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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2724. Отображено 100.
07-06-2012 дата публикации

Body section radiographic apparatus, and a noise removing method for the body section radiographic apparatus

Номер: US20120140877A1
Автор: Daisuke Notohara, Kazuyoshi Nishino, Koichi Shibata, Mikihiko Kato
Принадлежит: Shimadzu Corp

A body section radiographic apparatus for serially acquiring a series of fluoroscopic images while synchronously moving a radiation source and a radiation detecting device, and obtaining a sectional image of a subject from the series of fluoroscopic images. The apparatus includes, besides the radiation source which emits a beam of radiation and the radiation detecting device which is opposed to the radiation source and has a plurality of radiation detecting elements, a synchronous moving device for moving the radiation source and the radiation detecting device synchronously with each other, and a radiation grid disposed to cover a radiation detecting plane of the radiation detecting device for removing scattered radiation. The fluoroscopic images are serially acquired while moving the radiation grid relative to the radiation detecting device to change positions where radiation transmission unevenness of the radiation grid is projected on the radiation detecting device.

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Номер записи: 1
13-09-2012 дата публикации

Multi-source radiation system and method for interwoven radiotherapy and imaging

Номер: US20120230464A1
Автор: Athanasios ETMEKTZOGLOU, C. Clifton LING, Edward Shapiro, Margie A. HUNT, Pengpeng ZHANG
Принадлежит: SLOAN KETTERING INSTITUTE FOR CANCER RESEARCH, Varian Medical Systems Inc

An arc radiotherapy and imaging system is provided which includes a first radiation source and a second radiation source. The first radiation source is suitable for treating a region of a patient, and the second radiation source is suitable for imaging the region of the patient. A control is also provided for automatically adjusting system operation, according to a defined schedule, between treating the region of the patient using the first radiation source and imaging the region of the patient using the second radiation source, thereby facilitating both treating and imaging of the region of the patient.

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Номер записи: 2
27-09-2012 дата публикации

Apparatus for providing dental radiology image and method cephalometric

Номер: US20120243662A1
Автор: Jean-Marc Inglese, Sylvie Bothorel, Vincent LOUSTAUNEAU
Принадлежит: Individual

A dental x-ray unit comprising: an X-ray generator adapted to generate an X-ray beam in the direction of a patient's head, means of collimation adapted to confer given dimensions to the generated X-ray beam; a sensor placed facing the generator, receiving the radiologic projection of the collimated beam having irradiated the patient's head and supplying a cephalometric image of the patient's head, characterized in that the device includes: the means to acquire at least one photographic image of the patient's head, the means of automatic control for the means of collimation according to the at least one photographic image so that the dimensions of the collimated X-ray beam are adjusted to the dimensions of the patient's head.

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Номер записи: 3
29-11-2012 дата публикации

Computed Tomography Imaging Process And System

Номер: US20120301004A1
Автор: Adrian Paul Sheppard, Andrew Maurice Kingston, Arthur Sakellariou, Shane Jamie Latham, Trond Karsten Varslot
Принадлежит: Australian National University

A computed tomography imaging process, including: accessing projection data representing two-dimensional projection images of an object acquired using a misaligned tomographic imaging apparatus; and processing the projection data to generate misalignment data representing one or more values that quantify respective misalignments of the tomographic imaging apparatus.

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Номер записи: 4
03-01-2013 дата публикации

Methods and apparatus for scatter correction for cbct system and cone-beam image reconstruction

Номер: US20130004042A1
Автор: DONG Yang, Nathan J. Packard, Robert A. Senn
Принадлежит: Individual

Embodiments of methods and/or apparatus for 3-D volume image reconstruction of a subject, executed at least in part on a computer for use with a digital radiographic apparatus, can obtain image data for 2-D projection images over a range of scan angles. For each of the plurality of projection images, an enhanced projection image can be generated. In one embodiment, a first scatter intensity distribution through the plurality of projection images can be modulated based on a first scaling function and a SPR to generate a second scatter intensity distribution through the plurality of projection images, which can be combined with the original plurality of projection images.

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Номер записи: 5
28-03-2013 дата публикации

Extremity imaging apparatus for cone beam computed tomography

Номер: US20130077741A1
Автор: David H. Foos, Jeffrey H. Siewerdsen, John Yorkston, Robert Asento
Принадлежит: Individual

An apparatus for cone beam computed tomography of an extremity has a digital radiation detector and a first device to move the detector along a circular detector path extending so that the detector moves both at least partially around a first extremity of the patient and between the first extremity and a second, adjacent extremity. The detector path has radius R 1 sufficient to position the extremity approximately centered in the detector path. There is a radiation source with a second device to move the source along a concentric circular source path having a radius R 2 greater than radius R 1 , radius R 2 sufficiently long to allow adequate radiation exposure of the first extremity for an image capture by the detector. A first circumferential gap in the source path allows the second extremity to be positioned in the first circumferential gap during image capture.

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Номер записи: 6
04-07-2013 дата публикации

3D DIGITAL ENDODONTICS

Номер: US20130171580A1
Автор: Vallotton Paul-Henri, Van Lierde Carl
Принадлежит:

A method and system are described for 3D digital endodontics characterized in that 3D imaging equipment such as a CT or MRI scanner, ultrasound or the like are used to digitize the infected tooth or teeth, a 3D representation of the root canal system is extracted from the image data and visualized on a computer screen, a surgical template is designed to guide the endodontic instruments to localize the root canal(s) intra-operatively and said guide is manufactured by means of a computer driven system (e.g. milling, rapid prototyping, etc.). 152.-. (canceled)53. A computer based method for 3D digital endodontics , 3D imaging equipment being used to digitize an image of an infected tooth or teeth to thereby form image data , the method comprising:providing a user interface to extract a 3D representation of a root canal system from the image data and to visualize the root canal system on a visual display unit, wherein the 3D representation of the root canal system is expressed in a user specified coordinate system;the user interface being adapted to enable design of a surgical template to guide endodontic instruments to localize the root canal intra-operatively based on the 3D representation of the root canal system.54. The method of claim 53 , further comprising manufacturing said template by means of a computer driven system claim 53 , wherein the computer driven system is a milling claim 53 , a rapid prototyping claim 53 , or layered manufacture system.55. The method of claim 53 , wherein digital templates of a plurality of root canal instruments are provided claim 53 , allowing 2D superimposed views of instruments and canal shapes or canal cross-sections for treatment planning and instrument selection.56. The method of claim 53 , wherein location of root canal orifices is determined by extracting the root canal system from the image data.57. The method of claim 56 , wherein the step of extracting is carried out by indicating points along the axis of the root canal ...

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Номер записи: 7
01-08-2013 дата публикации

METHOD FOR DETERMINING POSITION OF ORTHODONTICS MINI-SCREW AND APPARATUS THEREOF

Номер: US20130196280A1
Автор: Han Jae Il, Jeong Jeong Woon, KIM Jin Kook
Принадлежит: INFINITT HEALTHCARE CO., LTD.

Disclosed herein are a method and apparatus for determining the location of an orthodontic fastener. In the method, a first location on a tooth and a second location on alveolar bone are set on a patient's medical image. Thereafter, a first rectilinear line including two points, that is, the set first and second locations, is generated. Thereafter, bone density values at the locations of the alveolar bone on the generated first rectilinear line are computed using the medical image. Finally, the location of the alveolar bone at which a first fastener is inserted is determined based on the computed bone density values. 1. A method of determining a location of an orthodontic fastener , comprising:setting, by a processor, a first location on a tooth and a second location on alveolar bone on a patient's medical image;generating, by the processor, a first rectilinear line including two points, that is, the set first and second locations;computing, by the processor, bone density values at locations of the alveolar bone on the generated first rectilinear line using the medical image; anddetermining, by the processor, a location of the alveolar bone at which a first fastener is inserted based on the computed bone density values.2. The method of claim 1 , further comprising displaying claim 1 , by the processor claim 1 , the computed bone density values at the locations of the alveolar bone on a screen on which the medical image is displayed.3. The method of claim 2 , wherein displaying further comprises claim 2 , when a third location on the first rectilinear line is selected in response to user input claim 2 , displaying a bone density value at the selected third location in synchronization of the third location.4. The method of claim 1 , wherein determining further comprises determining a location having a maximum one of the bone density values to be the location at which the first fastener will be inserted.5. The method of claim 1 , wherein determining further comprises ...

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Номер записи: 8
15-08-2013 дата публикации

METHOD AND SYSTEM FOR RESTORING BODY PARTS

Номер: US20130211242A1
Автор: BERTRAND Philippe, BOYER Hugo
Принадлежит:

The present relates to a method and system for determining the position and orientation of implants located in a body part of a patient. The method and system comprise determining voxels having an intensity value corresponding to implants in a three-dimensional radiographic representation of the body part. The method and system further comprise generating multiple random virtual implants, providing a score for each virtual implant, until obtaining a score that identifies implants. The score is based on a number of voxels having an intensity value corresponding to implants contained in each generated virtual implant. And the method and system comprise determining, based on the score of virtual implants, the position and orientation of the implants located in the body part. 1. A system for determining position and orientation of implants located in a body part of a patient , the system comprising: determining in a three-dimensional radiographic representation of the body part an intensity value of voxels representing the implants;', 'generating multiple random virtual implants and providing a score for each virtual implant, the score being based on a number of voxels contained in each generated virtual implant; and', 'determining position and orientation of the implants in the three-dimensional radiographic representation of the body part based on the score of each virtual implant., 'a processing unit for2. The system of claim 1 , wherein the processing unit generates multiple random virtual implants in various combinations of location and position.3. The system of claim 1 , wherein the processing unit further:selects a region of the three-dimensional radiographic representation to be searched for implants; andgenerating the random virtual implants is performed in the selected region.4. The system of claim 1 , wherein the processing unit further:generates data to be used to design a medical model adapted to the implants located in the body part.5. The system of claim ...

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Номер записи: 9
07-11-2013 дата публикации

X-ray CT Photographic Apparatus

Номер: US20130294569A1
Автор: Hideki Yoshikawa, Masakazu Suzuki
Принадлежит: J Morita Manufaturing Corp

An X-ray CT photographic apparatus including: a beam shaping mechanism that regulates an irradiation range of an X-ray generated from an X-ray generator and shapes the X-ray into an X-ray cone beam; and a main body controller that changes a read region, where an X-ray detection signal is read in the X-ray detector, according to the irradiation range of the X-ray cone beam. The main body controller changes the irradiation range of the X-ray cone beam to an x-axis direction during an X-ray CT photography such that only a set CT photographic region is irradiated with the X-ray cone beam according to the set CT photographic region input through a CT photographic region setting unit. The main body controller changes a read region in an X-ray detector with respect to the x-axis direction in a detection surface of the X-ray detector during the X-ray CT photography.

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Номер записи: 10
21-11-2013 дата публикации

Digital detector

Номер: US20130307923A1
Автор: Donna K. Rankin-Parobek, Jean Marc Inglese, Sylvie M. Bothorel
Принадлежит: Trophy SAS

An extra-oral dental imaging apparatus for obtaining an image from a patient has a radiation source and a digital imaging sensor that provides, for each of a number of image pixels, at least a first digital value according to a count of received photons that exceed at least a first energy threshold. A mount supports the radiation source and the digital imaging sensor on opposite sides of the patient's head. There can be a computer in signal communication with the digital imaging sensor for acquiring one or more two-dimensional images.

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Номер записи: 11
28-11-2013 дата публикации

System and method for wide cone helical image reconstruction

Номер: US20130315453A1
Автор: Brian Edward Nett, Guangzhi Cao, Jiang Hsieh
Принадлежит: General Electric Co

A tomographic system includes a gantry having an opening for receiving an object to be scanned, a radiation source, a detector positioned to receive radiation from the source that passes through the object, and a computer programmed to acquire a plurality of helical projection datasets of the object, reconstruct a first image using the acquired plurality of helical projection datasets and using a first reconstruction algorithm, reconstruct a second image using the acquired plurality of helical projection datasets and using a second reconstruction algorithm that is different from the first reconstruction algorithm, extract frequency components from each of the first and second images, sum the frequency components from each of the first and second images, and inverse transform the sum of the frequency components to generate a final image.

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Номер записи: 12
12-12-2013 дата публикации

DENTAL SURFACE MODELS

Номер: US20130330685A1
Автор: Lähelmä Jaakko
Принадлежит: PLANMECA OY

To create a digital surface model of an intra-oral anatomy, a recess or a hole in an impression material having a predetermined shape and size is scanned. The scanning results and information on the predetermined shape and size are used for determining a threshold value representing interface between the impression material and another material. The threshold value is then used in generating the digital surface model from CT scanning data of an impression of an intra-oral anatomy on said impression material. 1. A method for generating a digital surface model depicting an interface between an impression material and another material from volumetric data including image data of a physical impression of an intra-oral anatomy , the method comprising:acquiring information defining predetermined dimensions of a recess or a hole in the impression material;acquiring CT scanning results of said recess or hole in the impression material;using said information defining the predetermined dimensions and said CT scanning results of said recess or hole to determine a threshold value for an interface between the impression material and the other material;acquiring CT scanning results of the physical impression of an intra-oral anatomy, the impression being made in the same impression material as the recess or hole; andusing said threshold value in generating a surface of said impression of an intra-oral anatomy from said scanning results of said impression of an intra-oral anatomy.2. A method as claimed in claim 1 , further comprising:creating the recess or the hole in the impression material by means of a calibration tool having the predetermined dimensions.3. A method as claimed in claim 1 , wherein determining said threshold value includes:determining location and orientation of said recess or hole in said scanning results of said recess or hole;using the predetermined dimensions of said recess or hole and the determined location and orientation thereof to identify from the CT ...

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Номер записи: 13
20-03-2014 дата публикации

Inverse geometry volume computed tomography systems

Номер: US20140079181A1
Автор: Brian Patrick Wilfley, Edward Gerald Solomon, Joseph Anthony Heanue, Tobias Funk, Waldo Stephen Hinshaw
Принадлежит: Triple Ring Technologies Inc

The present invention pertains to an apparatus and method for inverse geometry volume computed tomography medical imaging of a human patient. A plurality of stationary x-ray sources for producing x-ray radiation are used. A rotating collimator located between the plurality of x-ray sources and the human patient is also used. A rotating detector can also be used.

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Номер записи: 14
07-01-2021 дата публикации

AUTOMATIC EXPOSURE CONTROL SETUP

Номер: US20210000440A1
Автор: TOEPFER Karin
Принадлежит:

A method for exposure control setup for a volume radiographic imaging apparatus obtains a reconstructed image volume of a subject acquired from the imaging apparatus using a set of x-ray technique settings. An image slice from the reconstructed image volume displays in at least a first rendering having a first corresponding noise factor and a second rendering having a second corresponding noise factor, different from the first noise factor. An operator instruction selects one of the at least first and second renderings and stores the corresponding noise factor for the set of x-ray technique settings. An automatic exposure control of the imaging apparatus is configured according to the stored noise factor. 1. A method for exposure control setup for a volume radiographic imaging apparatus , the method comprising:reconstructing a volume image of a subject based on a series of images of the subject captured by the volume radiographic imaging apparatus;displaying side-by-side a plurality of radiographic images of a same image slice from the reconstructed volume image of the subject, a first one of the displayed radiographic images comprising a fixed noise factor and a second one of the displayed radiographic images comprising a variable noise factor, and simultaneously displaying a user interface for adjusting the variable noise factor of the second one of the displayed radiographic images; andin response to an operator selection of the second one of the displayed radiographic images having a corresponding noise factor, determining an automatic exposure control for the volume radiographic imaging apparatus based on the corresponding noise factor.2. The method of claim 1 , further comprising configuring the volume radiographic imaging apparatus with the determined automatic exposure control.3. The method of claim 1 , further comprising reconstructing a volume image of the subject using a series of projection images acquired by the volume radiographic imaging apparatus ...

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Номер записи: 15
02-01-2020 дата публикации

COMPUTER TOMOGRAPH

Номер: US20200000423A1
Автор: MOHAMMADI ZAHRA
Принадлежит:

A computer tomograph () for mammographic x-ray imaging includes a MBFEX tube () and a flat-bed x-ray detector (). Cathodes () are arranged in a fixed manner in rows in the MBFEX tube (), the cathodes () being provided for the field emission of electrons. Geometry, radiation density and wavelength range of an x-ray beam (b) can be set. The MBFEX tube () is movable parallel (z) to the flat-bed x-ray detector (). The flat bed x-ray detector () includes a moveable x-ray screen (), the opening of which can be set. Using the x-ray screen (), an imaging area (A) on the detector surface (D) of the flat-bed x-ray detector () can be selected and moved. Compared to conventional computer tomographs having rotating x-ray components, the computer tomograph () has a lighter and more compact design, with which a particularly small focal spot size is achieved. 1. A computer tomograph for mammographic x-ray imaging , comprising: a MBFEX tube and a flat-bed x-ray detector , wherein a plurality of cathodes is arranged in a fixed manner in rows in the MBFEX tube , the cathodes being provided for field emission of electrons , and geometry , radiation density and wavelength range of an x-ray beam (b) are set , the MBFEX tube are movable parallel to the flat-bed x-ray detector , the flat bed x-ray detector comprising a moveable x-ray screen , the opening of the moveable x-ray screen is set , and , using the x-ray screen , an imaging area on a detector surface of the flat-bed x-ray detector is selectable and moveable.2. The computer tomograph according to claim 1 , wherein the cathodes contain carbon nanotubes.3. The computer tomograph according to claim 1 , wherein the cathodes contain nanorods for emitting electrons claim 1 , which contain a substance selected from a group of substances consisting of metal oxides claim 1 , metal sulfides claim 1 , nitrides claim 1 , carbides and silicon.4. The computer tomograph according to claim 1 , wherein the MBFEX tube has a grid device arranged in a ...

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Номер записи: 16
04-01-2018 дата публикации

Flexible radiopaque apron

Номер: US20180000432A1
Автор: Adam D. Pruyne
Принадлежит: Carestream Health Inc

A radiopaque apron configured to overlap an opening of a radiographic imaging apparatus. The apron is a two-layered radiopaque flexible material that extends over the opening. A first layer is large enough to extend across the imaging opening. The second layer has an apron opening smaller than the imaging opening and is positioned between the first layer and the apparatus.

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Номер записи: 17
05-01-2017 дата публикации

BREAST IMAGING APPARATUS, METHOD OF CONTROLLING BREAST IMAGING APPARATUS, AND STORAGE MEDIUM

Номер: US20170000433A1
Автор: Inagaki Chifuyu, Noguchi Takahiro, Ogasawara Hitomi, Shimada Tetsuo, Tsujii Osamu, Yamaguchi Sakiko
Принадлежит:

A breast imaging apparatus includes a radiation imaging unit capable of performing mammogram imaging and CT imaging. The breast imaging apparatus includes: a cover detection unit configured to detect a state of a cover that separates an object from the radiation imaging unit; and a control unit configured to switch between the mammogram imaging and the CT imaging based on the state. 1. A breast imaging apparatus including a radiation imaging unit capable of performing mammogram imaging and CT imaging , comprising:a cover detection unit configured to detect a state of a cover that separates an object from the radiation imaging unit; anda control unit configured to switch between the mammogram imaging and the CT imaging based on the state.2. The apparatus according to claim 1 , wherein the cover detection unit detects one of presence/absence of mounting of the cover and a position of the cover as the state of the cover.3. The apparatus according to claim 1 , wherein based on a detection result of the cover detection unit claim 1 , the control unitcontrols the CT imaging if the cover is mounted, andcontrols the mammogram imaging if the cover is not mounted.4. The apparatus according to claim 1 , further comprising a selection unit configured to select an imaging type claim 1 ,wherein the control unit switches between the mammogram imaging and the CT imaging based on the selected imaging type.5. The apparatus according to claim 1 , wherein the radiation imaging unit comprises:a radiation generation unit configured to generate radiation;a radiation detection unit configured to detect the radiation; anda rotation unit capable of rotating the radiation generation unit and the radiation detection unit in a state in which the radiation generation unit and the radiation detection unit face each other.6. The apparatus according to claim 5 , further comprising:an object detection unit configured to detect an object in front of the cover; anda pressing plate detection unit ...

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Номер записи: 18
05-01-2017 дата публикации

Radiation ct apparatus and method of controlling the same

Номер: US20170000434A1
Автор: Chifuyu Inagaki, Hitomi Ogasawara, Osamu Tsujii, Sakiko Yamaguchi, Takahiro Noguchi, Tetsuo Shimada
Принадлежит: Canon Inc

A radiation CT apparatus includes a rotation unit configured to rotate about a rotation axis, a radiation generation unit and a radiation detector which are fixed on either side of the rotation axis in the rotation unit, and a gantry cover containing the radiation generation unit and the radiation detector and including a breast insert portion configured to insert a breast of an object. An opening portion that can be opened and closed is placed on the gantry cover of the radiation CT apparatus. The radiation generation unit and the radiation detector are stopped to form a space that allows a user to access the breast insert portion from the opening portion.

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Номер записи: 19
03-01-2019 дата публикации

SYSTEM AND METHOD FOR MEDICAL IMAGING

Номер: US20190000564A1
Автор: FOTOUHIGHAZVINI Mohammadjavad, Fuerst Bernhard, Lee Sing Chun, Navab Nassir
Принадлежит:

The present disclosure provides a system and method for generating medical images. The method utilizes a novel algorithm to co-register Cone-Beam Computed Tomography (CBCT) volumes and additional imaging modalities, such as optical or RGB-D images. 1. A medical imaging apparatus comprising:a) a Cone-Beam Computed Tomography (CBCT) imaging modality having an X-ray source and an X-ray detector configured to generate a series of image data for generation of a series of volumetric images, each image covering an anatomic area;b) an auxiliary imaging modality configured to generate a series of auxiliary images; andc) a processor having instructions to generate a global volumetric image based on the volumetric images and the auxiliary images.2. The apparatus of claim 1 , wherein the processor is configured to perform an image registration process comprising co-registering the volumetric images and the auxiliary images claim 1 , wherein co-registration includes stitching of non-overlapping volumetric images to generate the global volumetric image.3. The apparatus of claim 1 , wherein the auxiliary imaging modality is an optical imaging modality configured to generate optical images.4. The apparatus of claim 1 , wherein the auxiliary imaging modality is a depth imaging modality.5. The apparatus of claim 1 , wherein the depth imaging modality is a RGB-D camera.6. The apparatus of claim 1 , wherein the imaging modalities are housed in a C-arm device.7. The apparatus of claim 6 , wherein the C-arm is configured to automatically navigate.8. A method for generating an image claim 6 , the method comprising:a) generating a series of image data using a Cone-Beam Computed Tomography (CBCT) imaging modality for generation of a series of volumetric images, each image covering an anatomic area;b) generating a series of auxiliary images using an auxiliary imaging modality; andc) generating a global volumetric image based on the volumetric images and the auxiliary images, thereby ...

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Номер записи: 20
04-01-2018 дата публикации

USING A CBCT BONE SCAN TO DESIGN A DENTAL ABUTMENT

Номер: US20180000569A1
Автор: Fisker Rune
Принадлежит: 3Shape A/S

Disclosed is a method of creating a digital abutment design of a customized dental abutment, the including comprising: obtaining a bone scan comprising a digital representation of at least a part of a patient's jaw including the surface of the jawbone; and designing the digital abutment design of the customized dental abutment; wherein the design of the digital abutment design is at least partly based on fulfilling a set of predefined design criteria including the relationship between the digital representation of the jawbone and the digital abutment design. 1. A method of generating a digital abutment design of a customized dental abutment , wherein the method comprises:obtaining a bone scan comprising a digital representation of at least a part of a patient's jaw including the surface of the jawbone; andgenerating the digital abutment design of the customized dental abutment;where the digital abutment design is at least partly based on fulfilling a set of predefined design criteria comprising the relationship between the digital representation of the jawbone and the digital abutment design.2. The method according to claim 1 , wherein the bone scan comprises a CBCT scan.3. The method according to claim 1 , wherein the relationship between the digital representation of the jawbone and the digital abutment design comprises the relationship between the surface of the digital representation of the jawbone and the outer surface of the digital abutment design.4. The method according to claim 1 , the method further comprising:segmenting the voxel data of the CBCT scan to provide at least a digital bone surface representation; andusing the digital bone surface representation to constrain the digital design of the customized dental abutment to confirm that the predefined design criteria have been fulfilled.5. The method according to wherein the bone scan further comprises information about the shape and position of at least part of one or more teeth adjacent to the desired ...

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Номер записи: 21
07-01-2016 дата публикации

BIO-COMPATIBLE RADIOPAQUE DENTAL FILLERS FOR IMAGING

Номер: US20160000939A1
Автор: Cutler Christopher, Sandhage Kenneth H.
Принадлежит:

Dental contrast formulations (“fillers”) of tailorable X-Ray radiopacity and methods for their use are provided. The disclosed fillers include mixtures of solid particles suspended in a biocompatible fluid. The solid particles contain one or more X-ray radiopaque materials. The biocompatible fluid can also contain one or more soluble X-ray radiopaque components. By controlling the composition of the solid particles, the composition of the biocompatible fluid, and the loading of the solid particles in the biocompatible fluid, the X-ray radiopacity and stability of the filler can be tailored to allow for improved discrimination of the filler within periodontal pockets, relative to adjacent soft tissue and teeth, so that the 3-D shape, volume, and depth of the pocket can be precisely and rapidly determined by X-Ray imaging. 1. A dental contrast composition comprising CaWOparticles dispersed in glycerol.2. The dental contrast composition of claim 1 , wherein the composition comprises 40 wt % suspension of CaWO.3. A composition claim 1 , comprising:particles comprising nanocellulose or diatom silica microshells coated with calcium phosphate suspended in a biocompatible fluid.4. The composition of claim 1 , wherein the calcium phosphate comprises hydroxyapatite.5. The composition of claim 3 , wherein the particles comprise microparticles claim 3 , nanoparticles claim 3 , or a combination thereof.6. The composition of claim 3 , wherein the composition is bioresorbable.7. The composition of claim 3 , wherein the particles have an X-ray radiopacity less than that of teeth or bone and greater than that of soft tissue.8. A contrast agent claim 3 , comprising:{'claim-ref': {'@idref': 'CLM-00003', 'claim 3'}, 'the composition of .'}9. The composition of claim 3 , wherein the microparticles are hollow.10. The composition of claim 3 , wherein the calcium phosphate comprises CaPO.11. The composition of claim 3 , wherein the calcium phosphate comprises Ca(PO)(OH).12. The composition ...

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Номер записи: 22
07-01-2016 дата публикации

METHOD AND APPARATUS FOR LARGE FIELD OF VIEW IMAGING AND DETECTION AND COMPENSATION OF MOTION ARTIFACTS

Номер: US20160005194A1
Автор: BERTRAM Matthias, NEUKIRCHEN Christoph, SCHRETTER Colas
Принадлежит:

A method and apparatus are provided to improve large field of view CT image acquisition by using at least two scanning procedures: (i) one with the radiation source and detector centered and (ii) one in an offset configuration. The imaging data obtained from both of the scanning procedures is used in the reconstruction of the image. In addition, a method and apparatus are provided for detecting motion in a reconstructed image by generating a motion map that is indicative of the regions of the reconstructed image that are affected by motion artifacts. Optionally, the motion map may be used for motion estimation and/or motion compensation to prevent or diminish motion artifacts in the resulting reconstructed image. An optional method for generating a refined motion map is also provided. 1. An apparatus for generating a motion map , the apparatus comprising:a radiation source;a radiation sensitive detector which detects radiation emitted by the source that has traversed an examination region; anda reconstructor and an image processor;wherein the radiation source and the radiation sensitive detector are used to acquire projection data at a plurality of angular positions relative to an object disposed in the examination region;wherein the reconstructor is used to generate a reference image from the projection data;wherein reference projection data is obtained from a forward projection of the reference image;wherein differences between the acquired projection data and the reference projection data are computed to determine line integral differences; andwherein the image processor uses the line integral differences to generate a motion map indicative of the regions of a corresponding image reconstructed from the projection data that are affected by motion.2. The apparatus of claim 1 , wherein the image processor applies a windowing process to refine the motion map.3. The apparatus of claim 1 , wherein the image processor applies a normalization process to refine the motion ...

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Номер записи: 23
20-01-2022 дата публикации

RADIATION SYSTEMS FOR RADITION TREATMENT AND IMAGING

Номер: US20220016443A1
Автор: JIANG Yifeng, MALTZ Jonathan, NI Cheng, STAHL Johannes, WANG LI, ZHOU Jingjie
Принадлежит: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

A radiation system is provided. The radiation system may include a bore accommodating an object, a rotary ring, a first radiation source and a second radiation source mounted on the rotary ring and a processor. The first radiation source may be configured to emit a first cone beam toward a first region of the object. The second radiation source may be configured to emit a second beam toward a second region of the object, the second region including at least a part of the first region. The processor may be configured to obtain a treatment plan of the object, the treatment plan including parameters associated with radiation segments. The processor may be further configured to control an emission of the first cone beam and/or the second beam based on the parameters associated with the radiation segments to perform a treatment and a 3-D imaging simultaneously. 1. A radiation system , comprising:a bore configured to accommodate an object;a rotary ring;a first radiation source mounted on the rotary ring and configured to emit a first cone beam toward a first region of the object;a second radiation source mounted on the rotary ring and configured to emit a second beam toward a second region of the object, the second region including at least a part of the first region; and obtain a treatment plan of the object, the treatment plan including one or more radiation segments;', 'cause the rotary ring to rotate around the object in one direction continuously for at least two full rotations; and', 'control an emission of at least one of the first cone beam or the second beam based on the treatment plan to perform a treatment and a 3-D imaging simultaneously., 'a processor configured to cause the radiation system to2. The radiation system of claim 1 , wherein the processor is further configured to cause the radiation system to:obtain respiration information of the object;determine a rotation parameter of the rotary ring based on the respiration information of the object; ...

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Номер записи: 24
12-01-2017 дата публикации

Method and apparatus for acquiring panoramic and CBCT volumetric radiographies

Номер: US20170007191A1
Автор: Zoccatelli Giacomo
Принадлежит: Cefla Societa Cooperativa

Method and apparatus for acquiring volumetric CBCT radiographies in an apparatus having a rotary supporting arm, at the ends of which at least an X-ray source and at least an X-ray sensor are positioned, the supporting arm rotating the at least one source and the at least one sensor around a patient. The method includes the steps of positioning a patient on the positioning device, and acquiring a CBCT image through a trajectory having an angular extension lower than 360°, wherein the rotation center of the trajectory of the X-ray sensor is never on the median sagittal plane defined by the patient positioned inside the apparatus and the trajectory is not symmetric to any of the possible sagittal planes of the patient. 1. A method of acquiring volumetric CBCT radiographies comprising:providing an acquisition apparatus having a rotary supporting arm, wherein at least an X-ray source and at least an X-ray sensor are positioned at ends of the rotary supporting arm, and wherein the rotary supporting arm is configured to rotate the at least one X-ray source and the at least one X-ray sensor around a patient;positioning a patient on a positioning device coupled to the apparatus; andacquiring a CBCT image through a rotational trajectory of the rotary supporting arm having an angular extension less than 360°,wherein a distance between the at least one X-ray source and the at least one X-ray sensor is less than 600 mm,wherein a rotation center of the trajectory of the X-ray sensor is never on a median sagittal plane defined by a patient positioned inside the apparatus, andwherein the trajectory of the X-ray sensor is not symmetric to any possible sagittal planes of the patient.2. The method according to claim 1 , wherein the distance between the at least one X-ray source and the at least one X-ray sensor is approximately the distance between the at least one X-ray source and the at least X-ray one sensor common for acquiring panoramic images.3. The method according to claim 2 ...

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Номер записи: 25
14-01-2016 дата публикации

METHOD AND DEVICE FOR GENERATING A LOW-DOSE X-RAY IMAGE PREVIEW, IMAGING SYSTEM AND COMPUTER PROGRAM PRODUCT

Номер: US20160007946A1
Автор: Kleinszig Gerhard, Siewerdsen Jeffrey, VOGT Sebastian, WANG Adam
Принадлежит:

A method of generating a preview of at least one low-dose x-ray image includes the followings steps: obtaining an initial volumetric representation of a patient from an x-ray device; creating at least one x-ray image projection from the initial volumetric representation; injecting correlated noise into at least one of the x-ray image projections; and processing the noise-injected x-ray image projections to create at least one preview of a patient-specific low-dose x-ray for showing to a user. There are also described a device for generating at least one preview of a low-dose x-ray image, a corresponding imaging system, and a non-transitory computer readable medium. 1. A method of generating a preview of a low-dose x-ray image , the method comprising the following steps:obtaining an initial volumetric representation of a patient by an x-ray device;creating one or more x-ray image projections from the initial volumetric representation;injecting correlated noise into at least one of the x-ray image projections to form one or more noise-injected x-ray image projections;processing the noise-injected x-ray image projections to generate at least one preview of a patient-specific low-dose x-ray image for display to a user according to a task specific to the patient.2. The method according to claim 1 , wherein the initial volumetric representation is a preoperative computed tomography scan.3. The method according to claim 1 , which comprises causing a low-dose x-ray image preview to simulate an intraoperative cone-beam computed tomography image.4. The method according to claim 1 , wherein the step of creating at least one x-ray image projection based on the initial volumetric representation comprises one of more of the following: simulating tube voltage and filtration claim 1 , beam hardening claim 1 , detector energy response of a cone-beam computer tomograph.5. The method according to claim 1 , wherein the step of creating an x-ray image projection based on the initial ...

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Номер записи: 26
14-01-2021 дата публикации

X-RAY CT APPARATUS AND IMAGING CONTROL METHOD

Номер: US20210007699A1
Автор: Tsuyuki Masaharu, YODA Takahiro
Принадлежит: Canon Medical Systems Corporation

According to one embodiment, an X-ray computed tomography (CT) apparatus includes an X-ray tube, an area detector, a rotary frame, generation circuitry, processing circuitry, and a controller. The generation circuitry is configured to generate a reference image of the subject based on an output from the area detector that is given in response to radiation of the X-rays from a predetermined position around the rotational axis for a period required to perform on/off control of radiation of the X-rays. The processing circuitry is configured to set, based on the reference image, an imaging condition for use in scanning for the subject. The controller is configured to control the scanning based on the set imaging condition. 1. An X-ray computed tomography (CT) apparatus comprising:an X-ray tube configured to radiate cone beam-shaped X-rays;an area detector configured to detect the X-rays having radiated from the X-ray tube and passed through a subject;a rotary frame supporting the X-ray tube and the area detector in such a manner that the X-ray tube and the area detector are rotatable about a rotational axis;generation circuitry configured to generate a reference image of the subject based on an output from the area detector that is given in response to radiation of the X-rays from a predetermined position around the rotational axis for a period required to perform on/off control of radiation of the X-rays;processing circuitry configured to set, based on the reference image, an imaging condition for use in scanning for the subject; anda controller configured to control the scanning based on the set imaging condition.2. The X-ray CT apparatus according to claim 1 , wherein the controller is further configured to perform control so that radiation of the X-rays is suspended and rotation of the rotary frame is continued for a period after completion of X-ray irradiation for generating the reference image and until start of the scanning.3. The X-ray CT apparatus according to ...

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Номер записи: 27
12-01-2017 дата публикации

Method, apparatus, and computer readable medium for removing unwanted objects from a tomogram

Номер: US20170011535A1
Автор: Ciamak Abkai, Kai Lindenberg
Принадлежит: SIRONA DENTAL SYSTEMS GMBH

A method, apparatus, and computer readable medium for removing an unwanted object from an image volume are provided. Volumetric data of an object of study is generated in a radiographic scan. Volumetric data of the unwanted object is obtained. The two sets of volumetric data are registered in a common coordinate system. The unwanted object is removed from the volumetric data of the object of study to create modified volumetric data of the object of study. Data from voxels surrounding the removed unwanted object may be used to populate voxels corresponding to the unwanted object with interpolated data. A plurality of forward projections are performed on the modified volumetric data of the object of study, and a tomogram with the unwanted object removed is constructed.

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Номер записи: 28
03-02-2022 дата публикации

Method and Device for Creating a Cephalometric Image

Номер: US20220031264A1
Автор: Loustauneau Vincent, Vlachomitrou Anna-Sesilia
Принадлежит:

An extra-oral dental imaging system comprises an X-ray source () and an imaging device () suitable for producing multiple frames during at least part of an exposure of an object (), the imaging device () being displaced along a scanning direction (X). A method for creating a cephalometric image of a human skull comprises a step of setting said imaging device () with an active area having in an imaging plane a width extending along said scanning direction (X), said width varying along a height direction perpendicular to said scanning direction (X); a step of synchronously displacing the X-ray source () and the imaging device () along said exposure profile; and a step of registering multiple frames produced by the imaging device () during the exposure of said object () to be imaged. Using for creating a cephalometric image by digital tomosynthesis. 1. A method for creating a cephalometric image of at least part of a human skull using an extra-oral dental imaging system having a conical shape x-ray beam and no cephalometric arm , said system comprising:an X-ray source for producing a conical shape x-ray beam used to irradiate an object to be imaged;an imaging device suitable for producing multiple frames during at least part of an exposure of said object;a manipulator for displacing the imaging device along an exposure profile between multiple frames during said at least part of the exposure of said object, the manipulator permitting the movement of the imaging device along a scanning direction (X), setting said imaging device with an active area having in an imaging plane a width extending along said scanning direction (X), said width varying along a height direction (Y) perpendicular to said scanning direction (X);', 'synchronously displacing the X-ray source and the imaging device along said exposure profile;', 'modifying the conical shape of said conical shape x-ray beam during displacement of the X-ray source and the imaging device to vary along a height direction ...

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Номер записи: 29
03-02-2022 дата публикации

Cbct comprising a beam shaping filter

Номер: US20220031266A1
Автор: Dirk Schaefer, Erik Hummel, Peter George Van De Haar, Petrus Johannes WITHAGEN
Принадлежит: Koninklijke Philips NV

In a first aspect, the present invention relates to a beam shaping filter ( 1 ) for use in a cone beam computed tomography system. The filter comprises a radiation attenuating element for positioning between an x-ray source of the cone beam computed tomography system and an object to be imaged. The radiation attenuation as function of position in at least a part ( 2 ) of the radiation attenuating element is rotationally symmetric with respect to a point of rotational symmetry ( 3 ).

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Номер записи: 30
15-01-2015 дата публикации

IMAGING METHODS FOR IMAGE-GUIDED RADIATION TREATMENT

Номер: US20150016586A1
Автор: Chopra Prashant, Jordan Petr, JR. Calvin R., Kuduvalli Gopinath, Lee Mu Young, Maurer
Принадлежит:

An IGRT system and methods are described embodiments of which perform selectively integration of x-ray source arrays, dual-energy imaging, stereoscopic imaging, static and source collimation, or inverse geometry tomosynthesis imaging to acquire or track a target during radiation treatment. 1. A method of image guided radiation treatment of a treatment target within an internal target volume of a patient , comprising:providing an image-guided radiation treatment (IGRT) apparatus having first and second x-ray tomosynthesis source-detector pairs positioned to acquire tomosynthesis projection images over first and second projection angle ranges, respectively, said first and second source-detector pairs being at a non-zero angle with respect to each other;acquiring first and second sets of tomosynthesis projection images of the target volume at distinct first and second x-ray energy levels, respectively, using said first and second x-ray tomosynthesis source-detector pairs, respectively;respectively processing said first and second sets of tomosynthesis projection images to generate respective first and second tomosynthesis reconstructed image sets of the target volume;processing, by a processing device, said first and second tomosynthesis reconstructed image sets in conjunction with each other on a locationwise basis within the target volume to generate a dual-energy processed image set; anddelivering treatment radiation to the treatment target within the target volume based at least in part on said dual-energy processed image set.2. The method of claim 1 , said first and second x-ray tomosynthesis source-detector pairs being disposed relative to each other and to the target volume such that no primary x-ray passing through the target volume from the first source impinges upon the second detector and no primary x-ray passing through the target volume from the second source impinges upon the first detector claim 1 , wherein said first and second sets of tomosynthesis ...

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Номер записи: 31
18-01-2018 дата публикации

Calibration phantom

Номер: US20180014809A1
Автор: William J. Sehnert, YUAN LIN
Принадлежит: Carestream Health Inc

A calibration phantom has a surface having a reflectance calibration target with a pattern that is indicative of one or more spatial reference positions. Radio-opaque markers are disposed in the phantom and are positionally correlated to the one or more spatial reference positions of the reflectance calibration target.

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Номер записи: 32
18-01-2018 дата публикации

TWO-DIMENSIONAL X-RAY IMAGING OF A TARGET VOLUME

Номер: US20180015305A1
Автор: Chopra Prashant, Jordan Petr, JR. Calvin R., Kuduvalli Gopinath, Lee Mu Young, Maurer
Принадлежит:

Methods of two-dimensional x-ray imaging of a target volume and tracking a target structure contained within a target volume are described. 1. A method of two-dimensional x-ray imaging of a target volume , comprising:providing an x-ray source array comprising a first plurality of x-ray sources, the first plurality of x-ray sources being spatially distinct from each other;providing a digital detector positioned substantially opposite the x-ray source array with respect to the target volume, the digital detector comprising an array of detector pixels extending over a predefined imaging area;providing an x-ray collimating device disposed between the x-ray source array and the target volume, the x-ray collimating device being positioned closer to the x-ray source array than to the target volume, the x-ray collimating device being configured and dimensioned to individually collimate x-ray radiation from each of said first plurality of x-ray sources onto a corresponding subgroup of detector pixels covering an area substantially smaller than said predefined imaging area;during a first exposure interval, activating each of said first plurality of x-ray sources for at least a portion of the first exposure interval; andduring the first exposure interval, selectively operating the digital detector to measure x-ray radiation at detector pixels corresponding to currently active ones of the first plurality of x-ray sources.2. The method of claim 1 , wherein the subgroups of detector pixels corresponding to different ones of said first plurality of x-ray sources are at least partially overlapping with each other.3. The method of claim 1 , wherein the subgroups of detector pixels corresponding to different ones of said first plurality of x-ray sources are substantially non-overlapping with each other.4. The method of claim 3 , wherein all of said first plurality of x-ray sources are activated substantially simultaneously.5. The method of claim 1 , wherein said activating each of ...

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Номер записи: 33
18-01-2018 дата публикации

TRACKING A TARGET STRUCTURE CONTAINED WITHIN A TARGET VOLUME USING AN X-RAY TOMOSYNTHESIS IMAGING DETECTOR

Номер: US20180015306A1
Автор: Chopra Prashant, Jordan Petr, JR. Calvin R., Kuduvalli Gopinath, Lee Mu Young, Maurer
Принадлежит:

Tracking a target structure contained within a target volume using an x-ray tomosynthesis imaging detector is described. 1. A method of tracking a target structure contained within a target volume , the target volume being a biological volume within a patient , comprising: an x-ray source array including a plurality of x-ray sources, the plurality of x-ray sources being spatially distinct from each other; and', 'an x-ray collimating device positioned generally adjacent to the x-ray source array;, 'providing an x-ray tomosynthesis imaging source comprising a plurality of controllable x-ray radiation source units disposed at a respective plurality of tomosynthesis projection angles relative to the target volume, each controllable x-ray radiation source unit comprisingproviding an x-ray tomosynthesis imaging detector comprising a plurality of digital detector units respectively disposed opposite said plurality of controllable x-ray radiation source units relative to the target volume, each said digital detector unit thereby forming a source unit-detector unit pair with a corresponding one of said controllable x-ray radiation source units, each digital detector unit comprising an array of detector pixels extending over a predefined imaging area, wherein each said controllable x-ray radiation source unit is operable in a first mode of operation to selectively illuminate a subregion of the predefined imaging area of the paired digital detector with primary x-rays, said illuminated subregion being controllable with respect to at least one of size, shape, and location on said predefined imaging area;receiving first information indicative of an expected location of the target structure within the target volume at a first point in time;for each said source unit-detector unit pair, processing said first information to identify a first bounded subregion of the digital detector expected to contain a first projection image of substantially the entire target structure at said ...

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Номер записи: 34
16-01-2020 дата публикации

VOLUME PRESENTATION FOR PLANNING A LOCATION OF AN INJECTION POINT

Номер: US20200015768A1
Автор: Mielekamp Pieter Maria, VAN DER STERREN WILLIAM EDWARD PETER
Принадлежит:

Visualization of a region of interest and planning a location of at least one injection point for a medical procedure is provided. At least one volume of imaging data for a region of interest is received. At least one virtual injection point is obtained. The at least one injection point indicates a location in a network of blood vessels for at least one injection. First and second rendering modules are controlled to construct a combined volume presentation including a first volume region rendered by a first rendering module at a relatively low level of detail and a second volume region is rendered at a higher level of detail by a second rendering module. The first and second volume regions are designated based on the at least one virtual injection point. 1. An image processing system for planning a location of at least one injection point for a medical procedure , the image processing system comprising:a data receiving module configured to receive at least one volume of imaging data for a region of interest;first and second rendering modules configured to render the at least one volume of imaging data;a processing module configured to obtain at least one virtual injection point indicating a location in a network of blood vessels for an injection;wherein the second rendering module renders imaging data at a higher level of detail than the first rendering module;wherein the processing module is configured to control the first and second rendering modules to construct a combined volume presentation including a first volume region rendered by the first rendering module and a second volume region based on imaging data at the higher level of detail rendered by the second rendering module, andwherein the processing module is configured to designate the first and second volume regions based on the at least one virtual injection point.2. The image processing system of claim 1 , comprising a user interface module configured to receive a user selection of the at least one ...

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Номер записи: 35
16-01-2020 дата публикации

RADIATION THERAPY SYSTEMS AND METHODS WITH TUMOR TRACKING

Номер: US20200016432A1
Автор: Maolinbay Manat
Принадлежит:

A radiation therapy system comprising a therapeutic radiation system (e.g., an MV X-ray source, and/or a linac) and a co-planar imaging system (e.g., a kV X-ray system) on a fast rotating ring gantry frame. The therapeutic radiation system and the imaging system are separated by a gantry angle, and the gantry frame may rotate in a direction such that the imaging system leads the MV system. The radiation sources of both the therapeutic and imaging radiation systems are each collimated by a dynamic multi-leaf collimator (DMLC) disposed in the beam path of the MV X-ray source and the kV X-ray source, respectively. In one variation, the imaging system identifies patient tumor(s) positions in real-time. The DMLC for the imaging radiation source limits the kV X-ray beam spread to the tumor(s) and/or immediate tumor regions, and helps to reduce irradiation of healthy tissue (e.g., reduce the dose-area product). 1. A radiation therapy system comprising:a rotatable gantry;an imaging system mounted on the gantry, wherein the imaging system comprises an imaging radiation source mounted at a first circumferential location along the gantry and a first multi-leaf collimator located in a radiation beam path of the imaging radiation source;a therapeutic radiation system mounted on the gantry, wherein the therapeutic radiation system comprises a therapeutic radiation source mounted at a second circumferential location along the gantry and a second multi-leaf collimator located in a radiation beam path of the therapeutic radiation source; and set the positions of the leaves of the first multi-leaf collimator to acquire image data of a region-of-interest (ROI) during a treatment session, and', 'set the positions of the leaves of the second multi-leaf collimator to apply therapeutic radiation to the ROI during the same treatment session., 'a controller in communication with the rotatable gantry, the imaging system and the therapeutic radiation system, wherein the controller is ...

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Номер записи: 36
19-01-2017 дата публикации

Systems and Methods for Approximating the Soft Tissue Profile of the Skull of an Unknown Subject

Номер: US20170018084A1
Автор: James Mah
Принадлежит: Nevada System of Higher Education NSHE

Facial approximation systems and methods for approximating the soft tissue profile of the skull of an unknown subject.

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Номер записи: 37
18-01-2018 дата публикации

SYSTEM AND METHOD FOR HIGH-TEMPORAL RESOLUTION, TIME-RESOLVED CONE BEAM CT ANGIOGRAPHY

Номер: US20180018796A1
Автор: Chen Guang-Hong, Strother Charles
Принадлежит:

A system and method for reconstructing an image using a cone-beam computed tomography (CT) imaging system includes acquiring data from a subject with the CT imaging system using a limited scan range that is less than 360 degrees. The process also includes reconstructing at least one image of the subject having a first temporal resolution from the data acquired, performing a temporal deconvolution of the at least one image using a finite temporal window to generate at least one image of the subject with a second temporal resolution that is greater than the first temporal resolution, and subtracting the at least one image of the subject with the second temporal resolution and a mask image of the subject to generate a time-resolved CT angiogram of the subject. 1. A method for reconstructing an image using a cone-beam computed tomography (CT) imaging system , the steps of the method comprising:a) acquiring data from a subject with the CT imaging system using a limited scan range that is less than 360 degrees;b) initializing an image matrix having columns that each correspond to a different image; i) minimizing a matrix rank of the image matrix;', 'ii) constraining the rank minimization of step c)i) subject to a consistency condition that promotes a forward projection of each column in the image matrix to be consistent with a different subset of the acquired data, each subset of the acquired data containing data that are consistent with each other while being inconsistent with data in other subsets of the acquired data;, 'c) reconstructing at least one image of the subject having a first temporal resolution from the data acquired in step a) byd) performing a temporal deconvolution of the at least one image using a finite temporal window to generate at least one image of the subject with a second temporal resolution that is greater than the first temporal resolution; ande) subtracting the at least one image of the subject with the second temporal resolution and a mask ...

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Номер записи: 38
28-01-2016 дата публикации

METHODS AND APPARATUS FOR DIFFERENTIAL PHASE-CONTRAST CONE-BEAM CT AND HYBRID CONE-BEAM CT

Номер: US20160022235A1
Автор: CAI Weixing, Ning Ruola
Принадлежит:

A raw DPC (differential phase contrast) image of an object is acquired. The background phase distribution due to the non-uniformity of the grating system is acquired by the same process without an object in place, and the true DPC image of the object is acquired by subtracting the background phase distribution from the raw DPC image. 1. A method for imaging an object , the method comprising:(a) acquiring a background image related to non-uniformity of a grating system by an imaging process without the object in place;(b) acquiring a raw projection image of the object by differential phase contrast (DPC) imaging process that uses a source, a detector, and the grating system;(c) wherein the grating system comprises a steppable source grating;(d) acquiring a corrected projection image of the object by removing the background image from the raw projection image;(e) acquiring a plurality of additional corrected projection images of the object at different view angles and performing three-dimensional (3D) computed tomography reconstruction of the object; and(f) displaying images of the object derived from the reconstruction.2. The method of claim 1 , wherein the object is a human breast.3. The method of claim 1 , wherein the 3D computed tomography is cone-beam computed tomography.4. The method of claim 1 , wherein the projection images are DPC images and the reconstruction is a matrix of 3D distribution of phase coefficient.5. The method of claim 1 , wherein the projection images are attenuation images and the reconstruction is a matrix of 3D distribution of attenuation coefficient.6. The method of claim 1 , wherein the projection images are dark-field images and the reconstruction is a matrix of 3D distribution of the density of sub-micron structures.7. The method of claim 1 , wherein the grating system comprises a phase grating and an analyzer grating.8. (canceled)9. The method of claim 1 , wherein the steppable source grating is stepped by a plurality of times within ...

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Номер записи: 39
26-01-2017 дата публикации

METHOD AND APPARATUS FOR CONE BEAM BREAST CT IMAGE-BASED COMPUTER-AIDED DETECTION AND DIAGNOSIS

Номер: US20170020474A1
Автор: Conover David L., Liu Shaohua, Ning Ruola, Zhang Xiaohua
Принадлежит:

Cone Beam Breast CT, (CBBCT) is a three-dimensional breast imaging modality with high soft tissue contrast, high spatial resolution and no tissue overlap. CBBCT-based computer aided diagnosis (CBBCT-CAD) technology is a clinically useful tool for breast cancer detection and diagnosis that will help radiologists to make more efficient and accurate decisions. The CBBCT-CAD is able to: 1) use 3D algorithms for image artifact correction, mass and calcification detection and characterization, duct imaging and segmentation, vessel imaging and segmentation, and breast density measurement, 2) present composite information of the breast including mass and calcifications, duct structure, vascular structure and breast density to the radiologists to aid them in determining the probability of malignancy of a breast lesion. 124-. (canceled)25. A system for imaging a breast of a patient , the system comprising:an imaging apparatus configured to take three-dimensional (3D) cone-beam breast computed tomography (CBBCT) projection images of the breast; pre-process the projection images of the breast to correct them based on breast shapes in the respective CNBCT projection images of the breast;', 'perform cone beam reconstruction using the pre-processed projection images to produce a matrix of a 3D distribution of linear attenuation coefficient of the breast;', 'perform correction and processing of the 3D distribution of linear attenuation coefficients of the breast to produce a corrected reconstruction matrix;, 'a computer device configured toa massive data storage/archive device configured to store the corrected reconstruction matrix into an image archive device; (i) detecting and characterizing parameters of duct tissue in the breast including shapes of the duct tissue,', '(ii) (ii) detecting and characterizing masses and calcifications in the breast, and', '(iii) (iii) assessing breast density;, 'a computer device comprising CPU-based computer facilities and GPU-based computer ...

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Номер записи: 40
24-01-2019 дата публикации

Method and Device for Creating a Cephalometric Image

Номер: US20190021683A1
Автор: Loustauneau Vincent, Vlachomitrou Anna-Sesilia
Принадлежит:

An extra-oral dental imaging system comprises an X-ray source () and an imaging device () suitable for producing multiple frames during at least part of an exposure of an object (), the imaging device () being displaced along a scanning direction (X). A method for creating a cephalometric image of a human skull comprises a step of setting said imaging device () with an active area having in an imaging plane a width extending along said scanning direction (X), said width varying along a height direction perpendicular to said scanning direction (X); a step of synchronously displacing the X-ray source () and the imaging device () along said exposure profile; and a step of registering multiple frames produced by the imaging device () during the exposure of said object () to be imaged. Using for creating a cephalometric image by digital tomosynthesis. 1. A method for creating a cephalometric image of at least part of a human skull in an extra-oral dental imaging system , said system comprising:an X-ray source for irradiating an object to be imaged;an imaging device suitable for producing multiple frames during at least part of an exposure of said object;a manipulator for displacing the imaging device along an exposure profile between multiple frames during said at least part of the exposure of said object, the manipulator permitting the movement of the imaging device along a scanning direction (X), setting said imaging device with an active area having in an imaging plane a width, extending along said scanning direction (X), said width varying along a height direction (Y) perpendicular to said scanning direction (X);', 'synchronously displacing the X-ray source and the imaging device along said exposure profile; and', 'registering said multiple frames produced by the imaging device during the exposure of said object to be imaged., 'characterized in that said method comprises the following steps2. A method according to claim 1 , wherein said active area is symmetric in ...

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Номер записи: 41
23-01-2020 дата публикации

SYSTEM AND METHOD FOR PROCESSING DATA FROM COMPUTED TOMOGRAPHY SCANS

Номер: US20200022666A1
Автор: PASSERA Katia, ROTILIO Alessandro, SOLBIATI Marco
Принадлежит:

A system for processing image data from computed tomography scans has: a first detection device capable of being activated prior to an antitumor treatment on a patient and configured to perform a standard computed tomography scan on the patient to obtain first image data; a second detection device capable of being activated intraoperatively at the end of the patient's antitumor treatment and configured to perform a cone-beam computed tomography scan to obtain second image data; a processing unit, in data communication with the first device and the second device and configured to process the first image data and the second image data, thereby providing a graphic comparison between a tumor mass prior to the antitumor treatment and a necrotic area after the antitumor treatment. A corresponding method for processing image data from computed tomography scans is also described. 117.-. (canceled)18. A processing system for processing image data from computed tomography scans , comprising:A) a first detection device capable of being activated prior to an antitumor treatment on a patient and that is configured to:A1) perform a standard computed tomography scan on a first part of the patient, said first part comprising a second part, which, in turn, comprises a tumor mass; a first image portion, representing said first part of said patient;', 'a second image portion, representing said second part of said patient; and', 'a third image portion, representing said tumor mass;, 'A2) obtain, from said standard computed tomography scan, first image data in a first reference system, comprisingB) a second detection device capable of being activated intraoperatively at the end of the patient's antitumor treatment and that is configured to:B1) perform a cone-beam computed tomography scan on a third part of said patient, wherein said third part substantially coincides with said second part and comprises a necrotic area resulting from said antitumor treatment; a fourth image portion, ...

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Номер записи: 42
28-01-2021 дата публикации

ULTRA-FAST SCANNING X-RAY IMAGING DEVICE

Номер: US20210022694A1
Автор: CHATZISTRATIS Dimitrios, SPARTIOTIS Konstantinos
Принадлежит:

Disclosed is a linear array ultra-fast scanning x-ray imaging device. The linear array x-ray imaging device is single photon sensitive, operating in frame output mode and including a pixel array Application Specific Integrated Circuit including the readout pixel array. The ASIC includes digital control logic and sufficient memory to accumulate digital output frames in various modes of operation prior to output from the ASIC, permitting advanced imaging functionalities directly on the ASIC, while maintaining a dynamic range of 16 bits and single photon sensitivity. The effective or secondary frames output from the pixel array ASIC can be tagged with user provided external triggers synchronizing the effective frames to the x-ray beam energy and/or to the movement of the x-ray source or imaged object. This enables dual energy imaging and ultra-fast scanning, without complex and costly conventional photon counting x-ray imaging sensors. The system architecture is simpler and higher performance. 1. An x-ray imaging device , comprising:a. a detector configured to detect impinging x-rays and to generate detector output signals;b. an application specific integrated circuit configured to receive said detector output signals and comprising a readout pixel array and electronics configured to produce a plurality of digital output pixel values each corresponding to a frame period;wherein said application specific integrated circuit further comprises a digital memory configured to store a resulting digital pixel value resulting from accumulation or averaging of the plurality of digital output pixel values, wherein the values correspond to at least two frame periods prior to readout of said resulting digital pixel value from said application specific integrated circuit.2. The x-ray imaging device according to claim 1 , wherein said digital memory is selected from the group consisting of a) SRAM claim 1 , b) registers claim 1 , c) FIFO claim 1 , and d) DRAM.3. The x-ray imaging ...

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Номер записи: 43
25-01-2018 дата публикации

COMMON-MASK GUIDED IMAGE RECONSTRUCTION FOR ENHANCED FOUR-DIMENSIONAL CONE-BEAM COMPUTED TOMOGRAPHY

Номер: US20180025510A1
Автор: CHEN Yunmei, Lu Bo, Park Chunjoo, ZHANG Hao
Принадлежит: University of Florida Research Foundation, Incorporated

A system for constructing images representing a 4DCT sequence of an object from a plurality of projections taken from a plurality of angles with respect to the object and at a plurality of times, first portions of the object being less static than second portions of the object. The system may comprise a processor configured to: iteratively process projections of the plurality of projections for a plurality of groups, each group comprising projections collected while the first portions of the object are in corresponding locations, with each iteration comprising: reconstructing first image portions representing the first portions of the object, the reconstructing of each first image portion of the first image portions being based on projections in a respective group of the plurality of groups; and reconstructing the second image portion, the second image portion representing the second portions of the object, based on projections in multiple groups of the plurality of groups and on the reconstructed first image portions. 1. A system for constructing a plurality of images representing a four-dimensional computed tomography sequence of an object from a plurality of projections , the projections being taken from a plurality of angles with respect to the object and at a plurality of times , first portions of the object being less static than second portions of the object , the system comprising: reconstructing first image portions representing the first portions of the object, the reconstructing of each first image portion of the first image portions being based on projections in a respective group of the plurality of groups; and', 'reconstructing a second image portion, the second image portion representing the second portions of the object, based on projections in multiple groups of the plurality of groups and on the reconstructed first image portions., 'iteratively process projections of the plurality of projections for a plurality of groups, each group of the ...

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Номер записи: 44
04-02-2016 дата публикации

Task-based source-detector trajectories for tomographic imaging

Номер: US20160029978A1
Автор: Jeffrey H. Siewerdsen, Joseph Webster Stayman
Принадлежит: JOHNS HOPKINS UNIVERSITY

An embodiment in accordance with the present invention provides a method for applying task-based performance predictors (measures of noise, spatial resolution, and detectability index) based on numerical observer models and approximations to the local noise and spatial resolution properties of the CBCT reconstruction process (e.g., penalized-likelihood iterative reconstruction). These predictions are then used to identify projections views (i.e., points that will constitute the scan trajectory) that maximize task performance, beginning with the projection view that maximizes detectability, proceeding to the next-best view, and continuing in an (arbitrarily constrained) orbit that can be physically realized on advanced robotic C-arm platforms. The performance of CBCT reconstructions arising from a task-based trajectory is superior to simple and complex orbits by virtue of improved spatial resolution and noise characteristics (relative to the specified imaging task) associated with the projection views constituting the customized scan orbit.

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Номер записи: 45
01-02-2018 дата публикации

EXTREMITY IMAGING APPARATUS FOR CONE BEAM COMPUTED TOMOGRAPHY

Номер: US20180028127A1
Автор: Csaszar Douglas M., Hartmann Andrew J., Litzenberger Michael A., Newman Peter A., Siewerdsen Jeffrey H., Yorkston John
Принадлежит:

An apparatus for cone beam computed tomography can include a support structure, a scanner assembly coupled to the support structure for controlled movement in at least x, y and z orientations, the scanner assembly can include a DR detector configured to move along at least a portion of a detector path that extends at least partially around a scan volume with a distance D1 that is sufficiently long to allow the scan volume to be positioned within the detector path; a radiation source configured to move along at least a portion of a source path outside the detector path, the source path having a distance D2 greater than the distance D1, the distance D2 being sufficiently long to allow adequate radiation exposure of the scan volume for an image capture by the detector; and a first gap in the detector path. 120.-. (canceled)21. A method of using an imaging apparatus for obtaining tomography images of a first portion of a patient , the method comprising:positioning the first portion of the patient proximate an imaging axis in the imaging apparatus;revolving a source of radiation and a radiation detector each along a respective revolution path about the imaging axis to capture radiographic images of the portion of the patient;positioning a second portion of the patient outside the respective revolution paths;providing a patient support bar coupled to a portion of the imaging apparatus for use by the patient to provide support for the patient;energizing the radiation source to direct radiation through the portion of the patient proximate the imaging axis and toward the detector; andcapturing radiographic images of the portion of the patient at different angles in the detector.22. The method of claim 21 , further comprising providing a height adjustable patient support bar.23. The method of claim 21 , further comprising attaching the patient support bar to a stationary portion of the imaging apparatus and maintaining the patient support bar stationary during the step of ...

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Номер записи: 46
01-02-2018 дата публикации

Automated tracking of fiducial marker clusters in x-ray images

Номер: US20180028133A1
Автор: Bernard Jones, Moyed Miften, Warren Campbell
Принадлежит: University of Colorado

Various embodiments of the present technology generally relate to identification of tumor location. More specifically, some embodiments of the present technology relate automated tracking of fiducial marker clusters in x-ray images for the real-time identification of tumor location and guidance of radiation therapy beams. Some embodiments use processed CBCT projection images, an automated routine of reconstruction, forward-projection, tracking, and stabilization generated static templates of the marker cluster at arbitrary viewing angles. Breathing data can be incorporated into some embodiments, resulting in dynamic templates dependent on both viewing angle and breathing motion. In some embodiments, marker clusters can be tracked using normalized cross correlations between templates (either static or dynamic) and CBCT projection images.

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Номер записи: 47
23-01-2020 дата публикации

System and method for creating registered images

Номер: US20200027264A1
Автор: Hung-Chi Tai, Kai-Lung Hua, Yu-Jen Chen
Принадлежит: MACKAY MEMORIAL HOSPITAL

Disclosed herein are a method and a system for creating a registered image that integrates the information of CT and CBCT images. With the present method and system, medical practitioners can precisely transform the information of CT image-based treatment plan into the CBCT image so as to accurately control the dosage and location of a radiation therapy. Accordingly, also disclosed herein are methods of treating a cancer in the subject with the aid of the method and/or system of the present disclosure.

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Номер записи: 48
17-02-2022 дата публикации

Portable medical imaging system

Номер: US20220047234A1
Автор: Hisham Salem, Norbert Johnson, Robert Stevens, Yuan Cheng
Принадлежит: Globus Medical Inc

A medical imaging system includes a movable station and a gantry. The movable station includes a gantry mount rotatably attached to the gantry. The gantry includes an outer C-arm slidably mounted to and operable to slide relative to the gantry mount, an inner C-arm slidably coupled to the outer C-arm and, an imaging signal transmitter and sensor attached to the C-arms. The two C-arms work together to provide a full 360 degree rotation of the imaging signal transmitter.

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Номер записи: 49
04-02-2021 дата публикации

SYSTEM AND METHOD TO VISUALIZE BOTH SOFT-TISSUE AND HARD BONE ANATOMY OF AN OBJECT

Номер: US20210030380A1
Автор: KUPPA Avinash Rao, Subrahmanyam Goteti Venkata
Принадлежит: Panacea Medical Technologies Private Limited

The present invention relates to a system and method to visualize both soft-tissue and hard bone anatomy of an object. For this purpose, the system () of the present invention comprises a ring gantry () with two x-ray sources () to simultaneously project radiations of different intensities to capture both soft-tissue and hard bone anatomy of the object. Further x-ray detectors () are placed opposite to the x-ray sources () to capture image data pertaining to both soft-tissue and hard bone anatomy of the object. A computer () to receive image data from the detectors and to generate single CBCT volume which has the information of both soft tissue and their relative hard-bone anatomy captured within the same time interval so as to identify any relative displacement of the soft tissue with respective to their hard bone anatomy in the generated volume. 1100. A dual energy cone beam computed tomography (DECBCT) system () comprises:{'b': 101', '102', '103, 'a) a ring gantry () with two x-ray sources (, ) to simultaneously project radiations of varying intensities to capture both soft-tissue and hard bone anatomy of an object;'}{'b': 104', '105', '102', '103, 'b) x-ray detectors (, ) placed opposite to the x-ray sources (, ) to capture image data pertaining to both soft-tissue and hard bone anatomy of the object;'}{'b': 106', '102', '103', '104', '105, 'claim-text': generate a first three-dimensional cone beam computed tomography (CBCT) volume pertaining to the received hard-bone anatomy of the object and a second three-dimensional CBCT volume pertaining to the received soft-tissue anatomy of the object;', 'combine the generated first three-dimensional CBCT volume pertaining to the hard-bone anatomy of the object and the second CBCT volume pertaining to the soft tissue anatomy of the object to form a single CBCT volume which has the information of both soft tissue and their relative hard-bone anatomy captured simultaneously by the x-ray detectors so as to identify any ...

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Номер записи: 50
30-01-2020 дата публикации

Structured detectors and detector systems for radiation imaging

Номер: US20200033486A1
Автор: Robert Sigurd Nelson, William Bert Nelson
Принадлежит: Minnesota Imaging and Engineering LLC

Detector module designs for radiographic imaging include first and second layers of scintillator rods or pixel arrays oriented in first and second directions. The first and second directions are transversely oriented to define a light sharing region between the first and second layers. Encoding features may be disposed in, on or between the first and second layers, and configured to modulate propagation of optical signals therealong or therebetween.

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Номер записи: 51
24-02-2022 дата публикации

VISUALIZATION, NAVIGATION, AND PLANNING WITH ELECTROMAGNETIC NAVIGATION BRONCHOSCOPY AND CONE BEAM COMPUTED TOMOGRAPHY INTEGRATED

Номер: US20220054097A1
Автор: Dickhans William J., Haley Kaylen J.
Принадлежит:

The present disclosure relates to systems, devices and methods for providing visual guidance for navigating inside a patient's chest. An exemplary method includes presenting a three-dimensional (3D) model of a luminal network, generating, by an electromagnetic (EM) field generator, an EM field about the patient's chest, detecting a location of an EM sensor within the EM field, determining a position of a tool within the patient's chest based on the detected location of the EM sensor, displaying an indication of the position of the tool on the 3D model, receiving cone beam computed tomography (CBCT) image data of the patient's chest, detecting the location of the tool within the patient's chest based on the CBCT image data, and updating the indication of the position of the tool on the 3D model based on the detected location. 120-. (canceled)21. A non-transitory computer-readable storage medium storing instructions which , when executed by a computer , cause the computer to:cause presentation of a 3D model of a luminal network;cause generation of, by an electromagnetic (EM) field generator of a tracking system, an EM field about a patient's chest;receive a detection a location of an EM sensor of the tracking system within the EM field;determine a position of a tool within the patient's chest based on the location of the EM sensor detected;cause display of an indication of the position of the tool on the 3D model;provide guidance for positioning a cone beam computed tomography (CBCT) imaging device based on the location of the EM sensor detected;actively track a location of the CBCT imaging device via a sensor included in the CBCT imaging device;determine whether the CBCT imaging device is moved into the EM field based at least in part on data received by the tracking system from the sensor included in the CBCT imaging device;compensate for distortion of the EM field caused by the CBCT imaging device being disposed within the EM field by adjusting the indication of ...

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Номер записи: 52
11-02-2016 дата публикации

Integration of intra-oral imagery and volumetric imagery

Номер: US20160042509A1
Автор: Bradley S. Carlson, Craig A. Andreiko, Robert F. Dillon
Принадлежит: Ormco Corp

Systems and methods are described for identifying a sub-gingival surface of a tooth in volumetric imagery data. Shape data is received from a surface scanner and volumetric imagery data is received from a volumetric imaging device. The shape data of the super-gingival portion of a first tooth is registered with the volumetric imagery data of the super-gingival portion of the first tooth to obtain a registration result. At least one criterion is then determined for detecting a surface of the first tooth in the volumetric imagery data of the super-gingival or the sub-gingival portion using the registration result. The surface of the sub-gingival portion of the first tooth is detected in the volumetric imagery data using the at least one criterion.

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Номер записи: 53
12-02-2015 дата публикации

MULTI-MODE CONE BEAM CT RADIOTHERAPY SIMULATOR AND TREATMENT MACHINE WITH A FLAT PANEL IMAGER

Номер: US20150043709A1
Автор: COLBETH Richard E., Johnsen Stanley W., Munro Peter, Pavkovich John M., Seppi Edward J., Shapiro Edward G.
Принадлежит:

A multi-mode cone beam computed tomography radiotherapy simulator and treatment machine is disclosed. The radiotherapy simulator and treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The flat panel imager captures x-ray image data to generate cone-beam CT volumetric images used to generate a therapy patient position setup and a treatment plan. 1. A radiation treatment system , comprising:a rotatable gantry;a treatment source;a cone-beam radiation source coupled to the rotatable gantry;a flat-panel imager coupled to the rotatable gantry, wherein the flat-panel imager is operable to capture image projection data of a patient;a patient support to support the patient; andlogic configured to control the patient support and place the patient in an operative position to begin a treatment based on the image projection data.2. The radiation treatment system of claim 1 , wherein the logic comprises at least one of hardwired logic and a programmable computer component; and wherein the programmable computer component comprises a processor.3. The radiation treatment system of claim 1 , wherein the flat-panel imager includes an amorphous silicon sensor array and includes a cesium iodide scintillator claim 1 , wherein the cesium iodide scintillator includes a mixture in a large matrix of cesium iodide crystals coated with a reflective powder and epoxy.4. The radiation treatment system of claim 1 , wherein the flat-panel imager is capable of fluoroscopic imaging claim 1 , radiographic imaging claim 1 , and cone-beam CT imaging.5. The radiation treatment system of claim 1 , wherein the flat-panel imager is capable of generating image projection data at 15 to 30 frames per second.6. The radiation treatment system of claim 1 , further comprising:a computing unit, coupled to the rotatable gantry, to store the image projection data captured by the flat-panel imager.7. The radiation treatment system of claim 1 , ...

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Номер записи: 54
08-02-2018 дата публикации

Digital Image Remapping

Номер: US20180040147A1
Автор: ALHRISHY Mazen, CARRELL Tom, PENNEY Graeme
Принадлежит: Cydar Limited

The present invention relates to production of 2D digital images suitable for use in medical imaging. The invention particularly relates to remapping X-ray images taken from a first viewpoint so that they present the same image as seen from a second viewpoint. Remapping is achieved by registering separate 2D images taken from the first and second viewpoints of an area with a 3D scan volume of the same region to ascertain their relative viewpoints with respect to the 3D scan volume. The image taken with respect to the first viewpoint is then remapped to yield the image as seen from the second viewpoint. 1. An image generation method comprising:a) obtaining first and second 2D images through an object to be imaged, wherein the images are from different viewpoints with respect to the object; andb) remapping pixels of the first 2D image to generate a remapped image from the viewpoint of the second 2D image.2. The method according to claim 1 , comprising:a) providing a 3D image data set of the object to be imaged; andb) registering the first and second 2D images with the 3D image data set.3. The method according to claim 2 , comprising defining a remapping surface within the 3D image data set.5. (canceled)6. The image generation method claim 1 , of claim 1 , comprising:a) obtaining first and second 2D images through an object to be imaged, wherein the images are from different viewpoints with respect to the object;b) obtaining a third 2D iimage through an object to be imaged, wherein the third image shares the viewpoint of the first image and is aligned with the first image;c) providing a 3D image data set of the object to be imaged:d) defining a remapping surface within the 3D image data set;e) registering the first and second 2D images with the 3D image data set and determining the viewpoint of the first and second 2D images with respect to the 3D image data set; i. determining which pixels of the third 2D image correspond to the pixels of the first 2D image;', 'ii. ...

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Номер записи: 55
18-02-2021 дата публикации

Simulated orthodontic treatment via augmented visualization in real-time

Номер: US20210045701A1
Автор: Amy UNKLESBAY, Cody J. OLSON, Richard E. Raby
Принадлежит: 3M Innovative Properties Co

A system and method for simulating orthodontic treatment using augmented reality. An electronic image of a user's face is received from a digital camera, and a region of interest in the image is identified where the region includes the user's teeth. Virtual orthodontic appliances are placed on the user's teeth in the image, and the user's image with the virtual orthodontic appliances is displayed on an electronic display device. The method occurs in real-time to provide the user with the augmented image simulating treatment when or shortly after the image of the user is received. The system and method can display a 3D representation of the user's face augmented with the virtual appliances. The user's augmented image or 3D representation can also be supplemented for display with an image or model of the user's facial anatomy such as an x-ray or a cone beam computed tomography image.

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Номер записи: 56
15-02-2018 дата публикации

SYSTEM AND METHOD FOR INCREASING THE ACCURACY OF A MEDICAL IMAGING DEVICE

Номер: US20180042570A1
Автор: Boll Morten, BRANDT Sami, HOLME Jens Peter, Öjelund Henrik, SØRENSEN Thomas Sangild
Принадлежит: 3Shape A/S

A method for improving the accuracy of a digital medical model of a part of a patient, the method includes obtaining a set of at least 2 medical images of the patient, where an element comprising a predefined geometry and/or predefined information was attached to the patient during the recording of the medical images; obtaining at least 2 tracking images taken with at least one camera having a known positional relationship relative to the medical imaging device, said tracking images depicting at least part of the element; determining any movement of the element between acquisition of the at least 2 tracking images; and generating the digital medical model from the acquired medical images, wherein the determined movement of the element is used to compensate for any movement of the patient between the acquisition of the medical images. 1. A method for improving the accuracy of a digital medical model of a part of a patient , the medical model comprising at least 2 medical images recorded with a medical imaging device , the method comprising:obtaining a set of at least 2 medical images of the patient, where an element comprising a predefined geometry and/or predefined information was attached to the patient during the recording of the medical images;obtaining at least 2 tracking images taken with at least one camera having a known positional relationship relative to the medical imaging device, said tracking images depicting at least part of the element;determining any movement of the element between acquisition of the at least 2 tracking images; andgenerating the digital medical model from the acquired medical images, wherein the determined movement of the element is used to compensate for any movement of the patient between the acquisition of the medical images.2. The method according to claim 1 , wherein the predefined information of the element comprises at least one fiducial marker.3. The method according to claim 1 , wherein the predefined information of the ...

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Номер записи: 57
18-02-2021 дата публикации

MANIPULATION OF A RESPIRATORY MODEL VIA ADJUSTMENT OF PARAMETERS ASSOCIATED WITH MODEL IMAGES

Номер: US20210049764A1
Автор: Core Matthew, Kahn Robert, Lugosi Kolos
Принадлежит:

A method and apparatus for manipulation of a respiratory model via adjustment of parameters associated with model images is described. The method includes identifying one of more images of a plurality of images that are used with a previously generated model associated with a position and motion of a targeted region of a patient to receive radiation treatment. The method also includes generating, by a processing device, a new model to be associated with the position and motion of the targeted region based on a selection that is associated with one of the one or more images of the plurality of images, wherein the new model is a relationship between a series of internal features and external marker positions. The method further includes delivering radiation to the targeted region based on the new model. 1. A method comprising:identifying one of more images of a plurality of images that are used with a previously generated model associated with a position and motion of a targeted region of a patient to receive radiation treatment;generating, by a processing device, a new model to be associated with the position and motion of the targeted region based on a selection that is associated with one of the one or more images of the plurality of images, wherein the new model is a relationship between a series of internal features and external marker positions; anddelivering radiation to the targeted region based on the new model.2. The method of claim 1 , further comprising sorting the one or more images of the plurality of images.3. The method of claim 1 , wherein the one of the one or more images of the plurality images is at an intermediate position in a respiratory order.4. The method of claim 2 , further comprising receiving the selection associated with one or more images of the plurality of images.5. The method of claim 4 , wherein the sorting of the one or more images of the plurality of images is based on a respiratory order associated with the patient claim 4 , and ...

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Номер записи: 58
18-02-2016 дата публикации

METHOD AND SYSTEM FOR SUBSTANTIALLY REDUCING CONE BEAM ARTIFACTS BASED UPON IMAGE DOMAIN DIFFERENTIATION IN CIRCULAR COMPUTER TOMOGRAPHY (CT)

Номер: US20160048983A1
Автор: CHIANG Be-Shan, LABNO Thomas, NAKANISHI Satoru, ZAMYATIN Alexander
Принадлежит:

Cone beam artifacts arise in circular CT reconstruction. The cone beam artifacts are substantially removed by reconstructing a reference image from measured data at circular source trajectory, differentiating the reference image; generating synthetic data by forward projection of the differentiated reference image along a pre-determined source trajectory, which supplements the circular source trajectory to a theoretically complete trajectory, reconstructing a correction image from the synthetic data and optionally applying a scaling factor. Ultimately, the cone beam artifact is substantially reduced by generating a corrected image using the reference image and the correction image that has been optimally scaled based upon the adaptively determined scaling factor value. 1. A method of substantially reducing cone beam artifacts , comprising:a) providing a first image;b) differentiating the first image to generate differentiated image;c) forward projecting the differentiated image to generate differentiated data;d) convoluting the differentiated line data to generate the convolved data;e) back projecting the convolved data to generate a second image; andf) correcting the first image based upon the second image to generate a corrected image.2. The method of substantially reducing cone beam artifacts according to wherein the differentiated data is generated at sparse view positions.3. The method of substantially reducing cone beam artifacts according to wherein the differentiated data is generated for a full set of rays determined by a physical detector size.4. The method of substantially reducing cone beam artifacts according to wherein the differentiated data is generated for an extended set of rays determined by extended image volume based upon the first image.5. The method of substantially reducing cone beam artifacts according to wherein the differentiated data is generated for a limited subset of rays required for reconstructing the first image.6. The method of ...

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Номер записи: 59
19-02-2015 дата публикации

METHOD AND APPARATUS FOR TOMOGRAPHIC X-RAY IMAGING AND SOURCE CONFIGURATION

Номер: US20150049855A1
Автор: FUNK TOBIAS, HEANUE JOSEPH ANTHONY, Hinshaw Waldo Stephen, Solomon Edward Gerald, WILFLEY BRIAN PATRICK
Принадлежит: TRIPLE RING TECHNOLOGIES, INC.

The present invention pertains to an apparatus and method for inverse geometry volume computed tomography medical imaging of a human patient. A plurality of stationary x-ray sources for producing x-ray radiation are used. A rotating collimator located between the plurality of x-ray sources and the human patient is also used. A rotating detector can also be used. 1. A tomographic x-ray imaging system for imaging an object comprising:a plurality of x-ray sources positioned around said object for producing x-ray radiation;a moving collimator located between said plurality of x-ray sources and said object for projecting said x-ray radiation through said object; andan x-ray detector for measuring amount of said x-ray radiation passing through said object and striking said detector.2. The tomographic x-ray imaging system of wherein said plurality of x-ray sources are arranged in a ring around said object in a stationary configuration.3. The tomographic x-ray imaging system of wherein said x-ray detector rotates at a speed of at least three rotations per second.4. The tomographic x-ray imaging system of further comprising: a plurality of vacuum envelopes wherein each of said vacuum envelopes comprising a plurality of said x-ray sources.5. The tomographic x-ray imaging system of wherein said plurality of x-ray sources is an array of linear x-ray tubes.6. The tomographic x-ray imaging system of wherein said collimator is scanned with said x-ray radiation every 15 milliseconds.7. The tomographic x-ray imaging system of wherein axial width of said x-ray sources is similar to the axial width of said detector during exposure.8. The tomographic x-ray imaging system of wherein intensity of said x-ray radiation is adaptively adjusted based on attenuation of said x-ray radiation by said object.9. The tomographic x-ray imaging system of wherein said x-ray detector is a photon counting detector.10. The tomographic x-ray imaging system of wherein volume acquisition occurs with a scan ...

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Номер записи: 60
14-02-2019 дата публикации

SYSTEMS AND METHODS FOR ADJUSTING MEDICAL DEVICE

Номер: US20190046132A1
Автор: Xu Lu
Принадлежит: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

A method for adjusting a medical device is provided. The method includes obtaining an initial trajectory of a component of the medical device. The initial trajectory of the component includes a plurality of initial positions. For each of the plurality of initial positions, the method further includes determining whether a collision is likely to occur between a subject and the component according to the initial trajectory of the component. In response to the determination that the collision is likely to occur, the method further includes updating the initial trajectory of the component to determine an updated trajectory of the component. 1. A system , comprising:a storage device storing a set of instructions; and obtain an initial trajectory of a component of a medical device, wherein the initial trajectory of the component includes a plurality of initial positions; and', determine whether a collision is likely to occur between a subject and the component according to the initial trajectory of the component, and', 'in response to the determination that the collision is likely to occur between the subject and the component, update the initial trajectory of the component to determine an updated trajectory of the component., 'for each of the plurality of initial positions,'}], 'at least one processor in communication with the storage device, wherein when executing the set of instructions, the at least one processor is configured to cause the system to2. The system of claim 1 , wherein to determine whether the collision is likely to occur between a subject and the component claim 1 , the at least one processor is further configured to cause the system to:determine, during a movement of the component, whether the collision is likely to occur between a subject and the component.3. The system of claim 1 , wherein to determine whether the collision is likely to occur between a subject and the component claim 1 , the at least one processor is further configured to cause the ...

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Номер записи: 61
08-05-2014 дата публикации

X-ray Photography Apparatus

Номер: US20140126687A1
Автор: Hideki Yoshikawa, Makoto Honjo
Принадлежит: J Morita Manufaturing Corp

An X-ray photography apparatus including: a turning arm that supports an X-ray generator and an X-ray detector which are opposed to each other so that the head of a patient can be interposed therebetween, and a moving mechanism that includes a turning part and a moving part. The turning part turns the turning arm about a turning axis with respect to the head. The moving part moves the turning arm relative to the head in a direction perpendicular to the turning axis. The X-ray photography apparatus also includes: an image processor that generates an X-ray image, a photographic region designation part that designates part of a row of teeth along a dental arch as a pseudo intraoral radiography region, and an X-ray forming mechanism that changes the irradiation direction in which the head is irradiated with an X-ray relative to the axial direction of the body axis of the patient.

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Номер записи: 62
13-02-2020 дата публикации

System and method for increasing the accuracy of a medical imaging device

Номер: US20200046308A1
Автор: Henrik ÖJELUND, Jens Peter HOLME, Morten BOLL, Sami Brandt, Thomas Sangild SØRENSEN
Принадлежит: 3Shape AS

A method for improving the accuracy of a digital medical model of a part of a patient, the method includes obtaining a set of at least 2 medical images of the patient, where an element comprising a predefined geometry and/or predefined information was attached to the patient during the recording of the medical images; obtaining at least 2 tracking images taken with at least one camera having a known positional relationship relative to the medical imaging device, said tracking images depicting at least part of the element; determining any movement of the element between acquisition of the at least 2 tracking images; and generating the digital medical model from the acquired medical images, wherein the determined movement of the element is used to compensate for any movement of the patient between the acquisition of the medical images.

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Номер записи: 63
22-02-2018 дата публикации

METHOD AND SYSTEM FOR IN SITU TARGETING OF OBJECTS

Номер: US20180050222A1
Автор: FEAIN Ilana, KEALL Paul, SHIEH Chun-Chien
Принадлежит: NANO-X PTY LTD

A method for tracking a target located within a body, whilst scanning the body using X-ray projections, the method including the steps of: (a) providing a first prior image of the body and target indicating their relative position; (b) iteratively performing, for a series of time intervals, the steps of: (i) acquiring a few spatially distributed x-ray projections of the target area; (ii) determining one of a series of motion phases for each x-ray projection; (iii) performing an iterative reconstruction of the image for each of the motion phases; and (iv) outputting a resultant image for a current time interval. 1. A method for tracking a target located within a body , whilst scanning the body using X-ray projections , the method including the steps of:(a) providing a first prior image of the body and target indicating their relative position; and, (i) acquiring a few spatially distributed x-ray projections of the target area;', '(ii) determining one of a series of motion phases for each x-ray projection;', '(iii) performing an iterative reconstruction of the image for each of the motion phases; and', '(iv) outputting a resultant image for a current time interval., '(b) iteratively performing, for a series of time intervals, the steps of2. The method as claimed in claim 1 , wherein the prior image comprises an X-ray image of the target.3. The method as claimed in claim 1 , wherein said iterative reconstruction utilises 4D cone beam CT to iteratively reconstruct the image.4. The method as claimed in claim 1 , wherein said determining step utilises a motion senor attached to the body to determine a current motion phase.5. The method as claimed in claim 1 , wherein said time interval corresponds to an about a 6 degree scanning arc.6. A method of tracking a moving target within a body claim 1 , the method including the steps of:(a) acquiring a first high resolution model of the target within the body;(b) forming a second high resolution model of the body without the ...

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Номер записи: 64
08-05-2014 дата публикации

Surgical location monitoring system and method using natural markers

Номер: US20140128727A1
Автор: Ehud Daon, Martin Gregory Beckett
Принадлежит: Navident Technologies Inc

The present invention involves a surgical hardware and software monitoring system and method allows for surgical planning while the patient is available for surgery, for example while the patient is being prepared for surgery so that the system may model the surgical site. In one embodiment, the model may be used to track contemplated surgical procedures and warn the physician regarding possible boundary violations that would indicate an inappropriate location in a surgical procedure. In another embodiment, the monitoring system may track the movement of instruments during the procedure and in reference to the model to enhance observation of the procedure.

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Номер записи: 65
10-03-2022 дата публикации

Tumor Position Determination

Номер: US20220071577A1
Автор: Erik Boman
Принадлежит: C-rad Positioning AB

A computer-implemented tumor position determining model is trained, based on a plurality of sets of image data, to determine a subsequent position of a tumor in a subject based on a subsequent 2D or 3D representation of a surface of the subject, an initial image of the tumor in the subject and an initial 2D or 3D representation of a surface of the subject. Each set of image data comprises an initial training image of a tumor in a subject, an initial training 2D or 3D representation of a surface of the subject, a subsequent training image of the tumor in the subject and a subsequent training 2D or 3D representation of a surface of the subject. The subsequent training image and the subsequent training 2D or 3D representation are taken at a subsequent point in time than the initial training image and the initial training 2D or 3D representation and the plurality of sets of image data are from a plurality of different subjects.

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Номер записи: 66
10-03-2022 дата публикации

IMPROVED METHOD OF ACQUIRING A RADIOGRAPHIC SCAN OF A REGION-OF-INTEREST IN A METAL CONTAINING OBJECT

Номер: US20220071578A1
Автор: Inglese Jean-Marc, Schildkraut Jay S., Wong Victor C.
Принадлежит:

The present disclosure describes a Cone Beam Computed Tomography (CBCT) imaging system and methods of operating the system to minimize the degradation of projection images by metal in a scanned object. The methods determine the location of metal in the scanned object by making an initial low dose scan and then, using information obtained from the low dose scan, perform a second scan that may be used to create a reconstruction with reduced artifacts. The methods also calculate X-ray source and detector scan trajectories which minimize reconstruction artifacts and optimize image quality, especially when a region-of-interest is near metal in the scanned object. Additionally, the methods of the present invention calculate X-ray source and detector scan trajectories that maximize the angular range of X-rays which pass through the region-of-interest that are not blocked by metal in the scanned object. 1. A method for acquiring a volume radiographic image of a metal containing object comprising the steps of:acquiring an initial scan of the object;using the initial scan to determine the location of metal in the object;determining a region-of-interest in the object;calculating an X-ray source and detector trajectory which maximizes the angular range of X-rays which pass through the region-of-interest unobstructed by metal;acquiring projection images of the object at various locations along the trajectory; andreconstructing the acquired projections to form a volume radiographic image.2. The method of claim 1 , wherein the step of acquiring includes acquiring an initial scan of the object using a low dose of X-rays.3. The method of claim 1 , wherein the step of determining includes receiving user input identifying the region-of-interest.4. The method of claim 1 , wherein the step of determining includes detecting the location of the region-of-interest that needs to be optimally imaged.5. The method of claim 1 , wherein the step of reconstructing includes weighting projection ...

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Номер записи: 67
10-03-2022 дата публикации

ADAPTIVE HELICAL COMPUTED TOMOGRAPHY

Номер: US20220071586A1
Автор: Bontus Claas, Schmitt Holger
Принадлежит:

A device () for controlling an image acquisition of a multi-slice computed tomography system (), MSCT, is disclosed. The device comprises an input () for receiving projection image data from the MSCT (), an output () for controlling operation of the MSCT () and a processor (). The processor () is adapted for controlling the MSCT to acquire a large volume localizer radiograph, and for defining an organ region in the localizer radiograph that delimits an organ of interest. The processor is adapted for acquiring a large volume helical CT scan of the subject, in which an X-ray cone angle is increased when the organ region in the subject is translated into the examination volume and decreased when the organ region is translated out of the examination volume. 1. A device for controlling an image acquisition of a multi-slice computed tomography system comprising a rotatable gantry , a multi-row detector , an X-ray source and an automated examination couch moving in a longitudinal direction , the device comprising:an input for receiving projection image data from the multi-row detector of the multi-slice computed tomography system;an output for controlling operation of the multi-slice computed tomography system; anda processor configured to control a first operation of the multi-slice computed tomography system via the output so that a computed tomography localizer radiograph of a subject to be imaged is acquired,wherein the processor is adapted for receiving the computed tomography localizer radiograph via the input,wherein the processor is adapted for controlling a second operation of the computed tomography system via the output so that a large volume overview that comprises at least an organ region defined on the computed tomography localizer radiograph and substantially delimiting an organ of interest in the subject is acquired, in which the subject is translated by the automated examination couch through an examination volume,wherein controlling the second operation ...

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Номер записи: 68
21-02-2019 дата публикации

CT IMAGING APPARATUS, INFORMATION PROCESSING APPARATUS, CT IMAGING METHOD, INFORMATION PROCESSING METHOD, AND RECORDING MEDIUM

Номер: US20190053775A1
Автор: Arai Yoshinori, Yoshikawa Hideki
Принадлежит:

A first position setting unit receives an operation to designate a position in a mesiodistal on a panoramic tomographic image displayed on a display, and sets a first position on a curved section based on the designation operation. The fluoroscopic imaging information providing unit provides information irradiating a subject with an X-ray beam along a direction having a component of a tangential direction at the first position of the curved section to execute fluoroscopic imaging acquiring a fluoroscopic image to a main body. A second position setting unit receives an operation to designate a position in a buccolingual direction on the fluoroscopic image displayed on the display, and sets a second position in the buccolingual direction based on the designation operation. 1. A CT imaging apparatus comprising:an X-ray generator that emits an X-ray beam;an X-ray detector that detects said X-ray beam;a support that supports said X-ray generator and said X-ray detector such that said X-ray generator and said X-ray detector oppose each other;a rotation driving unit that rotates said support around a rotation axis line located between said X-ray generator and said X-ray detector;a display that displays a panoramic tomographic image of a dental arch of a subject;a first position setting unit that receives an input of a designation operation to designate a position in a mesiodistal direction on said panoramic tomographic image displayed on said display, and sets a first position on said panoramic tomographic image based on the designation operation;a fluoroscopic imaging executing unit that irradiates said subject with the X-ray beam along a fluoroscopic imaging direction having a tangential direction component at said first position on said panoramic tomographic image by controlling said X-ray generator, said X-ray detector, and said rotation driving unit, and acquires a fluoroscopic image;a second position setting unit that receives an input of a designation operation to ...

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Номер записи: 69
01-03-2018 дата публикации

Gantry charged particle nozzle system - rolling floor interface apparatus and method of use thereof

Номер: US20180056093A1
Автор: Armin Huseinovic, Daniel J. Raymond, Jillian Reno, Lou Wainwright, Mark R. Amato, W. Davis Lee
Принадлежит: Armin Huseinovic, Daniel J. Raymond, Jillian Reno, Lou Wainwright, Mark R. Amato, W. Davis Lee

The invention comprises a segmented rolling floor apparatus and method of use thereof, such as for use in a charged particle cancer therapy system. The segmented rolling floor comprises a first spool and a second spool, attached to opposite ends of the rolling floor, which cooperatively wind and unwind the rolling floor. The segmented rolling floor circumferentially surrounds a nozzle system penetrating through an aperture in the segmented rolling floor, where the nozzle system is used to deliver charged particles, from an accelerator, to a tumor of a patient. The rolling floor and nozzle systems move at respective rates maintaining the nozzle system in the aperture allowing for a safe/walkable floor while allowing treatment of the tumor as a gantry rotates the nozzle system and delivers protons to the tumor from positions above and below the floor.

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Номер записи: 70
02-03-2017 дата публикации

METHODS AND SYSTEMS FOR IMAGE ARTIFACTS REDUCTION

Номер: US20170055931A1
Автор: Brehm Marcus, MELO DE CARVALHO Luis, PAYSAN Pascal, SEGHERS Dieter
Принадлежит:

One example method to reduce image artifacts, which may include obtaining measured projection data acquired using an imaging system. The measured projection data is associated with a target object and an artifact source within a radiation field of the imaging system. The method may also include generating virtual projection data associated with the artifact source by forward projecting a model representing one or more physical properties of the artifact source. The method may further include generating corrected projection data based on the measured projection data and the virtual projection data; and reconstructing the corrected projection data into reconstructed volume image data to reduce image artifacts caused by the artifact source. 1. A method to reduce image artifacts , the method comprising:obtaining measured projection data acquired using an imaging system, wherein the measured projection data is associated with a target object and an artifact source within a radiation field of the imaging system;generating virtual projection data associated with the artifact source by forward projecting a model representing one or more physical properties of the artifact source;generating corrected projection data based on the measured projection data and the virtual projection data; andreconstructing the corrected projection data into reconstructed volume image data to reduce image artifacts caused by the artifact source.2. The method of claim 1 , wherein the artifact source is at least partially within an imaging field that is smaller than the radiation field and the corrected projection data is generated based on the virtual projection data to at least partially remove the artifact source from the measured projection data and/or to reduce errors caused by the artifact source in the measured projection data.3. The method of claim 1 , wherein the artifact source is outside of an imaging field that is smaller than the radiation field and the corrected projection data is ...

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Номер записи: 71
04-03-2021 дата публикации

Patient table with lock and unlock device and improved safety arrangements

Номер: US20210059619A1
Автор: Chiampan Simone, Fasoli Martino, Mattiuzzo Giulio
Принадлежит:

An imaging apparatus includes a patient table with a gurney and a base. The gurney can slide between two extreme positions, an electrically supplied motoreducer controlled by a control unit causing the table to slide and having a lock/unlock system of the sliding that is mechanical, independent from the electrical supply, and manually controlled by a grabbing organ actuated by a human operator. The patient table may be provided together with a gantry having a housing transparent to light for at least part of its extension, and a control unit of the radiographic apparatus. The housing or a part thereof is associated with a source of light, and the control unit, when the apparatus is electrically supplied, and/or other status conditions are determined by a status sensor, causes the light source to be illuminated and the housing to light up in its translucent parts signalling the status condition. 1. An imaging apparatus comprising:{'b': 2', '6', '7, 'a patient table () configured to support a lying patient, the patient table comprising a gurney () and a base (), the gurney being configured to slide along a longitudinal direction between two extreme positions in relation to the base;'}{'b': '10', 'an electrically supplied moto-reducer () controlled by a control unit, so as to slide the patient table along at least one spatial axis; and'}{'b': '8', 'a lock/unlock system () of a sliding of the patient table,'}{'b': '8', 'wherein the lock/unlock system () of the sliding is a mechanical system independent from the electrical supply, manually controlled by a handle adapted to be actuated by a human operator.'}211. The imaging apparatus according to claim 1 , wherein the imaging apparatus is adapted for positioning the lying patient in a radiographic apparatus () and is provided in combination with the radiographic apparatus () claim 1 , wherein the radiographic apparatus is a cone-beam computerized tomography (CBCT) scanner claim 1 , a spiral computerized tomography scanner ...

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Номер записи: 72
20-02-2020 дата публикации

DOSE EVALUATION SYSTEM, PLANNING SYSTEM, PARTICLE IRRADIATION SYSTEM AND DOSE EVALUATION METHOD

Номер: US20200054897A1
Автор: Fujii Yusuke, FUJIMOTO Rintarou, KOYANO Hidenori, MATSUURA Taeko, MATSUZAKI Yuka, SHIRATO Hiroki, UMEGAKI Kikuo, Yamada Takahiro
Принадлежит:

A function/process of recording marker position data and spot data is provided. The marker position data includes position information of a marker measured for tumor tracking irradiation and information on time of execution of X-ray imaging. The spot data includes information on time of irradiation of each spot, a delivered irradiation position, and a delivered irradiation amount. The marker position data and the spot data are synchronized based on the time information, and by using the marker position data and the spot data upon spot irradiation, a delivered dose distribution of proton irradiation is calculated. With this configuration, it is possible to take the influence of interplay effect into consideration, and it is possible to support to make more appropriate determination upon replanning of a treatment plan. 111-. (canceled)12. A dose evaluation system comprising:an irradiation amount measuring device that measures an irradiation amount of a particle beam irradiated to a target;an irradiation position measuring device that measures an irradiation position of the particle beam irradiated to the target;an irradiation time recorder that records irradiation time at which the particle beam is irradiated;a tracking object position measuring part that measures a position of a tracking object being irradiated with the particle beam;a tracking object time recorder that records tracking object time at which the position of the tracking object is measured; anda dose distribution calculator that synchronizes the position of the tracking object being irradiated with the particle beam with the irradiation amount and the irradiation position of the particle beam at that time, by synchronizing the irradiation time with the tracking object time, and calculates a delivered dose distribution of irradiation to the target.13. The dose evaluation system according to claim 12 ,wherein the dose distribution calculator uses X-ray CBCT images obtained with the tracking object ...

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Номер записи: 73
05-03-2015 дата публикации

Image-based motion compensation of image data

Номер: US20150063534A1
Автор: Christopher Rohkohl, Herbert Bruder, Thomas Allmendinger, Thomas Flohr
Принадлежит: SIEMENS AG

A method, a computer program, a computer program product and a computed tomography system are disclosed. The image data is a spatially three-dimensional reconstruction. At least one value for an image metric of the image data is determined. A motion field for motion compensation of the image data is then determined on the basis of image data as a function of the image metric. Essentially, partial image data is determined, wherein the partial image data corresponds in each case to the spatially three-dimensional reconstruction from scan data of an angular sub-range. The motion field of the image data is determined at the control points via an optimization method as a function of the image metric, so that, thereafter, the partial image data is transformed in accordance with the motion of the motion field. New image data is then produced by merging the partial image data.

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Номер записи: 74
10-03-2022 дата публикации

Automated detection of lung conditions for monitoring thoracic patients undertgoing external beam radiation therapy

Номер: US20220076802A1
Автор: Jacek Lukasz KUSTRA, Maria Luiza BONDAR, Sergio CONSOLI
Принадлежит: Koninklijke Philips NV

A computerized system (SRS) for radiation therapy support. The system comprises an input interface (IN) for receiving an input image acquired by an imaging apparatus (IA1). The input image represents a region of interest (ROI) internal of a patient (PAT) and acquired before delivery of a dose fraction by a radiation therapy delivery apparatus (RTD). A pre-trained machine learning unit (MLU) of the system is configured to process the input image to detect a medical condition. A communication component (RC) of the system is configured to provide, based on the detected medical condition, an indication for one or more clinical actions to be performed in relation to the patient.

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Номер записи: 75
20-02-2020 дата публикации

IMAGE CAPTURE AND RECONSTRUCTION PROTOCOL SELECTION SYSTEM

Номер: US20200058141A1
Автор: Gindele Edward B., Packard Nathan J., Ray Lawrence A., SIMON Richard A.
Принадлежит:

A method accepts patient-specific data for imaging a patient extremity on a cone beam computed tomography apparatus and generates and displays a set of acquisition parameters and dose indication for 2-D projection image capture of the extremity. The generated set of acquisition parameters and dose indication are updated according to one or more operator entered instructions. A set of 2-D projection images of a 3-D volume is acquired according to the updated set of acquisition parameters. The volume is reconstructed according to the acquired set of 2-D projection images. 1. A method , executed at least in part by a computer , comprising:a) accepting patient-specific data for imaging a patient extremity on a cone beam computed tomography (CBCT) apparatus;b) generating and displaying, according to the patient-specific data, a set of acquisition parameters and a dose indication for 2-D projection image capture of the extremity on the CBCT apparatus;d) updating the generated set of acquisition parameters and dose indication according to one or more operator instructions;e) acquiring a set of 2-D projection images of a 3-D volume that includes the patient extremity according to the updated set of acquisition parameters;f) reconstructing the 3-D volume according to the acquired set of 2-D projection images; andg) displaying, storing, or transmitting at least a portion of the reconstructed 3-D volume.2. The method of further comprising displaying a generated set of reconstruction parameters and updating the reconstruction parameters according to one or more operator-entered instructions.3. The method of wherein the generated set of reconstruction parameters includes a voxel dimension.4. The method of wherein the generated set of reconstruction parameters includes a reconstruction algorithm.5. The method of wherein the CBCT apparatus has two or more x-ray sources and wherein the generated and displayed acquisition parameters specify using at least two of the two or more x- ...

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Номер записи: 76
28-02-2019 дата публикации

X-RAY IMAGING APPARATUS AND X-RAY IMAGING METHOD

Номер: US20190059842A1
Автор: Sadakane Tomoyuki, SUGIHARA Yoshito, Yoshikawa Hideki
Принадлежит:

An X-ray imaging apparatus receives mode selection using a mode selection receiving unit including a mode setting unit and an operation display. When a CT mode is selected by the mode selection receiving unit, an X-ray beam shape adjuster shapes an X-ray beam into an X-ray cone beam in which a center beam that is a center of the X-ray beam is orthogonally incident on a body axis of a head. When a panoramic mode is selected, the X-ray beam shape adjuster shapes the X-ray beam into an X-ray narrow beam in which the center beam is incident on the body axis from obliquely below to obliquely above, the X-ray narrow beam having a length in a direction of the body axis. 1. An X-ray imaging apparatus comprising:an X-ray generator;an X-ray detector;a support that supports said X-ray generator and said X-ray detector such that said X-ray generator and said X-ray detector oppose each other;a turning driving unit that turns said X-ray generator and said X-ray detector supported by said support;a head holder that holds a head of a subject;a mode setting receiving unit that receives a selection of a mode among a plurality of modes including a panoramic mode in which a curved section corresponding to a dental arch is imaged and a CT mode in which a predetermined imaging region is imaged; andan X-ray beam shape adjuster that adjusts a shape of an X-ray beam emitted from said X-ray generator according to the selected mode received by said mode setting receiving unit,whereinsaid X-ray beam shape adjuster shapes the X-ray beam into an X-ray cone beam in which a center beam that is a center of the X-ray beam is incident orthogonally to a body axis of said head in said CT mode, andsaid X-ray beam shape adjuster shapes the X-ray beam into an X-ray narrow beam in which a center beam that is a center of the X-ray beam is incident upward from obliquely downward with respect to said body axis, said X-ray narrow beam having a length in a direction of said body axis, in said panoramic mode.2. ...

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Номер записи: 77
17-03-2022 дата публикации

APPARATUS FOR FAST CONE-BEAM TOMOGRAPHY AND EXTENDED SAD IMAGING IN RADIATION THERAPY

Номер: US20220079534A1
Автор: Amstutz Martin, KELLER Simon, MORF Daniel
Принадлежит:

A cone-beam computed tomography (CBCT) system employs a large area detector and a cone-beam radiation source to allow for acquisition of projection images in about 180 degrees plus a fan angle to provide a complete data set for CBCT reconstruction to generate an image volume with a field of view (FOV) of at least about 20 cm. 1. A system , comprising:a source operable to produce a cone beam of radiation, the source being rotatable about an axis to irradiate an object from a plurality of angles;an area detector rotatable in synchrony with the source, the area detector being operable to acquire a projection image of the object when irradiated with the cone beam of radiation, wherein the area detector and the source are configured to allow for acquisition of a plurality of projection images in about 180 degrees plus a fan angle of the cone beam to provide a complete data set for CBCT reconstruction to generate an image volume with a field of view (FOV) of at least about 20 cm.2. The system of claim 1 , wherein the area detector and the source are configured to allow for acquisition of the plurality of projection images in about 180 degrees plus the fan angle to provide the complete data set for CBCT reconstruction to generate the image volume with an FOV ranging about from 20 to 50 cm.3. The system of claim 1 , wherein the area detector is positioned centrally on a beam axis of the cone beam of radiation.4. The system of claim 1 , further comprising:a source operable to produce radiation suitable for treatment of a disease and rotatable about the axis.5. The system of claim 4 , wherein the source operable to produce radiation suitable for treatment is rotatable about the axis at a speed of at least one revolution per minute.6. The system of claim 1 , wherein the source is rotatable about the axis to irradiate a patient containing the object claim 1 , and the area detector and the source are configured to acquire the plurality of projection images in about 180 degrees ...

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Номер записи: 78
17-03-2022 дата публикации

SYSTEM AND METHOD FOR IMAGING

Номер: US20220079535A1
Автор: Helm Patrick A., Shi Shuanghe
Принадлежит:

Disclosed is a system for imaging a system. The system may be operated to acquire image data of a subject in one or more manners. The image data acquired may be used to various purposes, such as generating an image for display, navigating a procedure, or other appropriate procedures. 1. An imaging system for acquiring image data of a subject , comprising:a gantry having a fixed gantry portion and a moveable gantry portion, wherein the moveable gantry portion is configured to move relative to the fixed gantry portion to allow access to an imaging region defined by the gantry, wherein the gantry in a closed configuration is configured to surround at least a portion of the imaging region;a source assembly configured to move within the gantry;a plurality of source portions positioned within the source assembly, wherein each source portion is configured to selectively emit x-rays;a detector configured to move within gantry, wherein the detector is configured to detect the emitted x-rays; anda controller configured to execute instructions to acquire image of the subject in the imaging region with at least one source portion of the plurality of source portions;wherein a first sub-plurality of source portions of the plurality of source portions are configured to acquire a first image data;wherein a second sub-plurality of source portions of the plurality of source portions are configured to acquire a second image data;wherein the source assembly including the plurality of source portions is positioned non-parallel with a plane of the gantry and are positioned anti-symmetrical relative to the detector.2. The system of claim 1 , wherein the anti-symmetrical source assembly is positioned such that a first number of the plurality of source portions are positioned on a first side of a line or plane extending from the detector and a second number of the plurality of source portions are positioned on a second side of the line extending from the detector such that the second number ...

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Номер записи: 79
17-03-2022 дата публикации

SYSTEM AND METHOD FOR IMAGING

Номер: US20220079536A1
Автор: Helm Patrick A., Shi Shuanghe
Принадлежит:

Disclosed is a system for imaging a system. The system may be operated to acquire image data of a subject in one or more manners. The image data acquired may be used to various purposes, such as generating an image for display, navigating a procedure, or other appropriate procedures. 1. An imaging system for acquiring image data of a subject , comprising:a gantry configured to at least partially surround an imaging region;a source assembly configured to be positioned relative to the imaging region at least in part by the gantry, wherein the source assembly includes at least a first source portion and a second source portion, wherein the first source portion is spaced a source distance away from the second source portion;a detector configured to be positioned relative to the imaging region at least in part by the gantry, wherein the detector is configured to be positioned to detect image data from both the first source portion and the second source portion substantially simultaneously; and operate the first source portion and the second source portion to selectively emit the x-rays through the imaging region to be detected at the detector,', 'generate image data based on the substantially simultaneously detection at the detector., 'a controller configured to execute instructions to2. The system of claim 1 , further comprising:a mobile cart configured to move the gantry from a first position to a second position;{'b': '0', 'wherein the gantry is at least one of a C-shaped gantry or an annular -shaped gantry.'}3. The system of claim 1 , wherein the gantry includes a fixed gantry portion and a moveable gantry portion;wherein the moveable gantry portion is configured to move relative to the fixed gantry portion to allow access to an imaging region defined by the gantry;wherein the gantry in a closed configuration is configured to at least partially surround the imaging region;wherein the source assembly is operable to move within at least one of the fixed gantry portion ...

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Номер записи: 80
09-03-2017 дата публикации

Image Guided Small Animal Stereotactic Radiation Treatment System

Номер: US20170065233A1
Автор: Yang Yidong
Принадлежит:

A dual, imaging and radiation system provides for finely aligned movement of a subject through the use of a computer controlled mounting stage having separate, non-gantry translational and rotational controllable movement. The system cycles a subject tissue between a treatment position where radiation doses are applied and an imaging position where high-quality computed tomography (CT) imaging is performed. Selective dose profiles and dose depths are achievable around an isocenter of the system. 1. An x-ray radiation treatment and analysis system for use in vivo testing of a subject tissue , the system comprising:a subject mounting stage having a rotational subsystem configured to rotate about a central axis and having a translational subsystem configured to move in translatory manner along at least two orthogonal directions;an image plate configured to image computed tomography images or a planar radiograph collected of a tissue of the subject during an imaging mode of the system;a collimating stage mounted to receive x-ray radiation from an x-ray source and configured to collimate the received x-ray radiation into a desired aperture size and direct the collimated x-ray radiation onto the tissue of the subject, where the collimating stage is adapted (i) to adjust between a first desired aperture size for use during an imaging mode and a second desired aperture size for use during a treatment mode, or (ii) to automatically move out of a path of the x-ray radiation during the imaging mode,wherein the image plate and the collimating stage are maintained in a fixed, not moving position during the imaging mode and during the treatment mode, and wherein the subject mounting stage is controlled to move to place the subject in proper position for imaging during the image mode and for treatment during the treatment mode; anda controller having at least one processor and at least one memory, the controller being coupled to control movement of the subject mounting stage in ...

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Номер записи: 81
17-03-2022 дата публикации

Systems and Methods for Generating Quick-Glance Interactive Diagnostic Reports

Номер: US20220084267A1
Автор: Aleksandrovskiy Vladimir Leonidovich, Ezhov Matvey Dmitrievich, Shumilov Evgeny Sergeevich
Принадлежит: Diagnocat, Inc.

A system for an infographic display of an image analysis, said system comprising: a processor; a non-transitory storage element coupled to the processor; encoded instructions stored in the non-transitory storage element, wherein the encoded instructions when implemented by the processor, configure the system to: receive at least one image frame; localize at least one of a present tooth, dental, or non-dental condition inside the received image frame and identify it by at least one of a number, name, or short-hand; extract the at least one identified tooth, dental, or non-dental condition within the received image; classify the at least one tooth, dental, or non-dental condition based on the extracted; and represent results of the at least one classified area of interest in at least one of three layers, wherein the layers are an image-based layer, infographic-based layer, or an informational layer. 1. A system for an infographic display of an image analysis , said system comprising: a non-transitory storage element coupled to the processor;', 'encoded instructions stored in the non-transitory storage element, wherein the encoded instructions when implemented by the processor, configure the system to:', 'receive at least one image frame;', 'localize at least one of a present tooth, dental, or non-dental condition inside the received image frame and identify it by at least one of a number, name, or short-hand;', 'extract the at least one identified tooth, dental, or non-dental condition within the received image;', 'classify the at least one tooth, dental, or non-dental condition based on the extracted; and', 'represent results of the at least one classified area of interest in at least one of three layers, wherein the layers are an image-based layer, infographic-based layer, or an informational layer., 'a processor;'}2. The system of claim 1 , wherein localization is achieved by performing object detection and subsequent semantic segmentation of at least one of the ...

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Номер записи: 82
10-03-2016 дата публикации

ARTIFACT-REDUCTION FOR X-RAY IMAGE RECONSTRUCTION USING A GEOMETRY-MATCHED COORDINATE GRID

Номер: US20160071293A1
Автор: Erhard Klaus, Homann Hanno Heyke, Nielsen Tim
Принадлежит:

A method for processing image data of an X-ray device () comprises the steps of: receiving a plurality of two-dimensional projection images () from an object of interest (), wherein the projection images have been acquired by transmitting X-rays () through the object of interest () with respect to different view angles; generating a three- dimensional raw image volume () from the plurality of two-dimensional projection images () with respect to a coordinate grid () adapted to the geometry of the transmitted X-rays (); and generating a deconvolved three-dimensional image () by applying a two- dimensional deconvolution to slices () of the three-dimensional raw image volume (), which slices () are adapted to the coordinate grid (). 1. A method for processing image data of an X-ray device , the method comprising the steps of:receiving a plurality of two-dimensional projection images from an object of interest, wherein the projection images have been acquired by transmitting X-rays through the object of interest with respect to different view angles;generating a three-dimensional raw image volume from the plurality of two-dimensional projection images with respect to a coordinate grid adapted to the geometry of the transmitted X-rays;generating a deconvolved three-dimensional image by applying a two-dimensional deconvolution to slices the three-dimensional raw image volume which slices are adapted to the coordinate grid.2. The method of claim 1 ,wherein the coordinate grid defines a cone with respect to an orthogonal grid.3. The method ofwherein the X-rays are generated by a point source and are transmitted through the object of interest via a cone beam;wherein the coordinate grid, has coordinate lines running along the cone beam.4. The method of claim 1 ,wherein the three-dimensional raw image volume is generated by filtered back projection of the two-dimensional projection images with respect to the coordinate grid.5. The method of claim 1 ,wherein the slices of the ...

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Номер записи: 83
12-03-2015 дата публикации

Gantry image guided radiotherapy system and related treatment delivery methods

Номер: US20150073256A1
Автор: Calvin R. Maurer, Jr., Euan S. Thomson
Принадлежит: Accuray Inc

Systems, methods, and related computer program products for image-guided radiation treatment (IGRT) are described. Provided according to one preferred embodiment is an IGRT apparatus including a barrel-style rotatable gantry structure that provides high mechanical stability, versatility in radiation delivery, and versatility in target tracking. Methods for treatment radiation delivery using the IGRT apparatus include conical non-coplanar rotational arc therapy and cono-helical non-coplanar rotational arc therapy. A radiation treatment head (MV source) and a treatment guidance imaging system including a kV imaging source are mounted to and rotatable with a common barrel-style rotatable gantry structure, or alternatively the MV and kV sources are mounted to separate barrel-style rotatable gantry structures independently rotatable around a common axis of rotation. Methods for intra-fraction target tracking in a gantry-style IGRT system based on comparisons between a pre-acquired planning image and intrafraction x-ray tomosynthesis images and/or intrafraction cone beam CT (CBCT) images are also described.

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Номер записи: 84
24-03-2022 дата публикации

Increased cone beam computed tomography volume length without requiring stitching or longitudinal c-arm movement

Номер: US20220087628A1
Автор: Neil R. Crawford, Norbert Johnson
Принадлежит: Globus Medical Inc

A medical imaging system includes a movable station having a C-arm, a collector, an X-ray beam emitter, and a controller. The collector is attached to a first end of the C-arm. The X-ray beam emitter faces the collector to emit an X-ray beam in a direction of the collector and is attached to a second end of the C-arm. The controller moves one of the X-ray beam emitter and the collector to a first offset position along a lateral axis orthogonal to the arc, and obtains a first set of images by rotating the collector and the X-ray beam emitter along the arc about a scanned volume. The controller moves the one of the X-ray beam emitter and the collector to a second offset position along the lateral axis, and obtains a second set of images. The controller combines the first and second set of images to generate a three-dimensional image of the scanned volume.

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Номер записи: 85
15-03-2018 дата публикации

APPARATUS AND METHOD FOR 4D X-RAY IMAGING

Номер: US20180070902A1
Автор: Lin Yuan, Sehnert William J.
Принадлежит:

A system for reconstructing a 4D image has a surface acquisition system for generating a 3D surface model of an object and an X-ray imaging system for acquiring at least one 2D X-ray projection image of the object. A controller controls the surface acquisition system and the X-ray imaging system. A processor applies a 4D reconstruction algorithm/method to the 3D surface model and the at least one 2D X-ray projection to reconstruct a 4D X-ray volume of the imaged body part in motion. 1. A system for reconstructing a 4D image , comprising:a surface acquisition system for generating a 3D surface model of an object;an X-ray imaging system for acquiring at least one 2D X-ray projection image of the object;a controller to control the surface acquisition system and the X-ray imaging system; anda processor to apply a 4D reconstruction algorithm/method to the 3D surface model and the at least one 2D X-ray projection to reconstruct a 4D X-ray volume of the imaged body part in motion.2. The system of claim 1 , wherein the surface acquisition system comprises:one or more light sources adapted to project a known pattern of light grid onto the object;one or more optical sensors adapted to capture a plurality of 2D digital images of the object; anda surface reconstruction algorithm for reconstructing the 3D surface model of the object using the at least one 2D projection image.3. The system of claim 2 , wherein the light sources and the optical sensors are adapted to be either:(i) mounted to a rotational gantry of the X-ray imaging system,(ii) affixed to the bore of the X-ray imaging system, or(iii) placed outside of (separate from) the X-ray imaging system.4. The system of claim 1 , wherein the X-ray imaging system comprises:one or more X-ray sources adapted to controllably emit X-rays; andone or more X-ray detectors including a plurality of X-ray sensors adapted to detect X-rays that are emitted from the X-ray sources and have traversed the object.5. The system of claim 4 , ...

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Номер записи: 86
15-03-2018 дата публикации

Imaging systems and methods

Номер: US20180070910A1
Автор: Addison Shelton, Evan Ruff, Gregory KOLOVICH, Igor ZAMLINSKY, Jason Franklin
Принадлежит: Micro C LLC

Versatile, multimode radiographic systems and methods utilize portable energy emitters and radiation-tracking detectors. The x-ray emitter may include a digital camera and, optionally, a thermal imaging camera to provide for fluoroscopic, digital, and infrared thermal imagery of a patient for the purpose of aiding diagnostic, surgical, and non-surgical interventions. The emitter may cooperative with an inventive x-ray capture stage that automatically pivots, orients and aligns itself with the emitter to maximize exposure quality and safety. The combined system uses less power, corrects for any skew or perspective in the emission, allows the subject to remain in place, and allows the surgeon's workflow to continue uninterrupted.

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Номер записи: 87
15-03-2018 дата публикации

SELF-CALIBRATING DEVICE FOR X-RAY IMAGING SCANNERS

Номер: US20180070912A1
Автор: Lin Yuan, Sehnert William J.
Принадлежит:

A position sensor has one or more fiducials formed of radio-opaque material and mounted along a surface of a radio-translucent body. A sensor element is coupled to the radio-translucent body and is spaced apart from the one or more fiducials and is energizable to acquire image content during receipt of exposure energy from an X-ray source to the position sensor. The sensor element is in signal communication with a processor and is energizable to generate data that is indicative of a relative position of the X-ray source. A radio-opaque covering is coupled against an outer surface of the radio-translucent body. 1. A position sensor comprising:one or more fiducials formed of radio-opaque material and disposed on a radio-translucent body;a sensor element coupled to the radio-translucent body and spaced apart from the one or more fiducials and energizable to acquire image content during receipt of exposure energy from an X-ray source to generate a signal according to the acquired image content, wherein the sensor element is in signal communication with a processor energizable to generate data indicative of a relative position of the X-ray source; anda radio-opaque covering coupled against an outer surface of the radio-translucent body.2. The position sensor of wherein the radio-translucent body is formed of a thermoplastic material.3. The position sensor of wherein the radio-opaque covering comprises a lead sheet or coating.4. The position sensor of further comprising a coupling mechanism to couple the position sensor to a radiography detector.5. The position sensor of wherein the sensor element is a CCD device.6. The position sensor of wherein the sensor element is a CMOS device.7. The position sensor of wherein the sensor element is a TFT device.8. The position sensor of wherein the position sensor has a single surface that is radio-translucent.9. The position sensor of wherein at least one of the one or more fiducials is spherical.10. A method for sensing position ...

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Номер записи: 88
24-03-2022 дата публикации

Method of Creating a Dental Implant Drill-Guide

Номер: US20220087789A1
Автор: Nulty Adam Brian
Принадлежит:

A method of creating a dental implant drill-guide is provided comprising the steps of using mucosal impression data of an edentulous maxillary or mandibular arch having a plurality of orthodontic screws inserted into the osseous tissue thereof and which extend through the gingival mucosa, along with image data of the arch to determine dental implant position data for the insertion of one or more dental implants into the edentulous maxillary or mandibular arch relative to the positions of the plurality of orthodontic screws. It is then possible to create a dental implant drill-guide to guide the drilling of dental-implant cavities in the edentulous maxillary or mandibular arch, and subsequently create a dental implant drill-guide from the dental implant drill-guide parameter data, the dental implant drill-guide having a plurality of orthodontic screw-seats which are engagable with the said plurality of orthodontic screws. 1. A method of creating a dental implant drill-guide for guiding the drilling of dental-implant cavities in an edentulous maxillary or mandibular arch , the method comprising the steps of:a] using mucosal impression data of an edentulous maxillary or mandibular arch having a plurality of orthodontic screws inserted into the osseous tissue thereof and which extend through the gingival mucosa, along with image data of the edentulous maxillary or mandibular arch to determine dental implant position data for the insertion of one or more dental implants into the edentulous maxillary or mandibular arch relative to the positions of the plurality of orthodontic screws;b] forming dental implant drill-guide parameter data from the determined dental implant position data; andc] creating a dental implant drill-guide from the determined dental implant drill-guide parameter data, the dental implant drill-guide having a plurality of orthodontic screw-seats which correspond to the said plurality of orthodontic screws of the mucosal impression data.2. A method as ...

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Номер записи: 89
15-03-2018 дата публикации

METHOD FOR STIMULATION OF ENDOGENOUS CRANIOFACIAL OSTEOGENESIS VIA STEM CELL ACTIVATION

Номер: US20180071130A1
Автор: BELFOR Theodore, Simonetti Scott A.
Принадлежит:

The present disclosure relates to methods for stimulation of craniofacial osteogenesis which includes the step of providing light intermittent cyclic tensil force to the craniofacial area of a patient. In an embodiment, the step of providing mechanical stress is achieved through the use of removable oral orthotic devices which utilize unilateral bite block technology. 1. A method of stimulating endogenous craniofacial osteogenesis , the method comprising:providing an orthotic device to a patient;positioning the orthotic device in a mouth of the patient to provide mechanical stress in the craniofacial region for at least a predetermined period of time for endogenous craniofacial osteogensis to take place; andremoving the device after the device has been in said patients mouth for all of the at least predetermined period of time.2. The method of further comprising:monitoring the development of new bone growth in the craniofacial region throughout treatment wherein facial scans obtained before commencement of treatment are compared to scans obtained after commencement of treatment.3. The method of wherein the facial scan is a cone beam computerized tomographic scan.4. The method of claim 1 , wherein stimulation of craniofacial osteogensis is in the region of the bony eye orbits.5. The method of claim 4 , wherein the stimulation of craniofacial osteogenesis results in periobital rejuvenation.6. The method of claim 1 , wherein the device is of .7. The method of claim 1 , wherein the device is the device of .8. The method of claim 1 , wherein the device is the device of .9. A method of stimulating mesenchymal stem cells within cranial sutres claim 1 , the method comprising:providing an orthotic device to a patient;positioning the orthotic device in a mouth of the patient to provide mechanical stress in the craniofacial region for at least a predetermined period of time for endogenous craniofacial osteogensis to take place; andremoving the device after the device has been ...

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Номер записи: 90
15-03-2018 дата публикации

CBCT and X-Ray Combined Setup with X-Ray Verification of Patient Positioning

Номер: US20180071551A1
Автор: Berlinger Kajetan, Knorr Sebastian, Rehs Joerg, Schlossbauer Cornel
Принадлежит:

The disclosure is directed to a radiotherapy system having a treatment device for treating a treatment body part of a patient with a treatment beam arrangement. The treatment device is included with a couch for placing the patient and includes a medical imaging devices for outputting three-dimensional cone-beam computed tomography images to a computer, and a medical imaging x-ray device for generating at least one x-ray image, if the patient is placed on the couch for treatment, and for outputting at least one x-ray image to the computer. The system will output movement control data to control the relative position of the treatment body part relative to the treatment beam if it is determined there is the offset between the position of the treatment body part relative to the bony structure as described by the image data and the position of the treatment body part relative to a bony structure. 1. A radiotherapy system , comprising:a treatment device for treating a treatment body part of a patient with a treatment beam arrangement;a couch for placing the patient, the treatment device constituted for treating the treatment body part, if the patient is placed on the couch for treatment;a first medical imaging device constituted for generating a three-dimensional first image and for generating at least one second image, if the patient is placed on the couch for treatment and for outputting the three-dimensional first image and the at least one second image to a computer; ora second medical imaging device constituted for generating a three-dimensional first image and for outputting the three-dimensional first image to a computer, and a third medical imaging device for generating the at least one second image, if the patient is placed on the couch for treatment, and for outputting the at least one second image to the computer;wherein the radiotherapy system further comprises the computer, wherein the computer comprises at least one processor which is configured to perform a ...

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Номер записи: 91
05-03-2020 дата публикации

X RAY IMAGING METHOD USING VARIABLE IMAGING PLANE PROJECTION AND X RAY IMAGING DEVICE APPLYING THE SAME

Номер: US20200069265A1
Автор: Joung Jinhun, KIM Yong-Kwon, Nguyen Manh Hung
Принадлежит:

The present disclosure relates to an x-ray imaging method using a variable imaging plane projection and to an x-ray imaging device applying the same. By applying a variable imaging plane projection using at least two sets of scan data for different heights obtained while varying the height of the x-ray generator from an imaging object, it is possible to solve problems caused due to a magnification effect generated in the x-ray imaging field based on a fan-beam-type or cone-beam-type x-ray generator, thereby providing more accurate x-ray image information. 1. An x-ray imaging method using an x-ray imaging device having an x-ray generator and an x-ray detector which are disposed such that an imaging object is interposed therebetween , the x-ray imaging method comprising:obtaining at least two sets of scan data for different heights by varying a height of the x-ray generator from the x-ray detector; andapplying a variable imaging plane projection using the at least two sets of obtained scan data to image an imaging target object in the imaging object at an actual position and size.3. The x-ray imaging method of claim 1 , wherein the variable imaging plane projection sets variable heights of the imaging target object consecutively determined along a scan direction to x-ray projection points at respective positions at arbitrary moments claim 1 , and causes the imaging target object to be projected at a calculated actual size by varying the imaging plane with respect to each of the heights at the arbitrary moments.4. The x-ray imaging method of claim 1 , wherein the x-ray generator uses a fan beam claim 1 , and the x-ray detector is configured in a one-dimensional-array (1D array) type.5. The x-ray imaging method of claim 4 , wherein during the postorder scan claim 4 , the scan is performed after the x-ray generator is shifted horizontally with a difference of a half pixel of the x-ray detector in comparison with the preorder scan.6. The x-ray imaging method of claim 4 , ...

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Номер записи: 92
19-03-2015 дата публикации

Reducing Artifacts in an Image Data Set and X-Ray Device

Номер: US20150078507A1
Автор: Kyriakou Yiannis
Принадлежит:

Streak artifacts generated by at least one X-ray attenuating object arranged outside a reconstruction volume in a three-dimensional image data set showing the reconstruction volume are reduced. The reconstruction volume is reconstructed from two-dimensional projection images recorded from different projection directions. The object is localized in the projection images showing the object. To determine corrected projection images for the reconstruction of the image data set, the image data of the area of each projection image showing the object is corrected to remove the object. The localization of the object is performed taking into account difference images of the measured projection images and from a reconstruction data set of forward-projected comparative images reconstructed from the measured projection images. 1. A method for reducing artifacts generated by at least one X-ray attenuating object arranged outside a reconstruction volume in a three-dimensional image data set showing the reconstruction volume , which is reconstructed from two-dimensional projection images recorded from different projection directions , the method comprising:localizing the object in the projection images showing the object; anddetermining corrected projection images for the reconstruction of the image data set, the image data of the area of each projection image showing the object being corrected to remove the object, wherein the localizing of the object is performed taking into account difference images of the measured projection images and from a reconstruction data set of forward-projected comparative images reconstructed from the measured projection images.2. The method as claimed in claim 1 , wherein localizing the object comprises localizing the object where the reconstruction volume is completely contained in all the projection images and the object has a higher density claim 1 , higher attenuation coefficient claim 1 , or the higher attenuation coefficient and the higher ...

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Номер записи: 93
19-03-2015 дата публикации

Dental x-ray imaging system having higher spatial resolution

Номер: US20150078513A1
Автор: Seung H. Baek
Принадлежит: Individual

A dental cone beam computed tomography (CBCT) system, with a photon generator configured to emit x-ray photons; a photon detector spaced apart from the photon generator so as to accommodate at least a portion of a human mouth therebetween, the photon detector configured to receive the x-ray photons; and a processor in electronic communication with the photon detector. The photon detector is a direct-conversion detector configured to convert each received x-ray photon directly to a corresponding electrical signal, to determine information corresponding to a spatial pattern of the electrical signals, and to transmit the information to the processor. The processor is further configured to generate an image of the portion of the human mouth from the transmitted information.

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Номер записи: 94
05-03-2020 дата публикации

GANTRY IMAGE GUIDED RADIOTHERAPY SYSTEM AND RELATED TREATMENT DELIVERY METHODS

Номер: US20200069970A1
Автор: JR. Calvin R., Maurer, Thomson Euan S.
Принадлежит:

A radiation treatment apparatus, comprising a gantry structure comprising a beam member extending between first and second ends of the gantry structure. The radiation treatment apparatus also includes a radiation treatment head movably mounted to the beam member in a manner that allows (i) translation of the radiation treatment head along the beam member between the first and second ends, and (ii) gimballing of the radiation treatment head relative to the beam member, the gimballing comprising pivotable movement in at least one independent pivot direction defined with respect to the beam member. The radiation treatment apparatus also includes a patient couch operative coupled with the radiation treatment head in manner to provide movement of the patient couch relative to the radiation treatment head. 1. A radiation treatment apparatus , comprising:a gantry structure; anda radiation treatment head movably mounted to the gantry structure to allow gimballing of the radiation treatment head relative to the gantry structure, the gimballing comprising pivotable movement in at least one independent pivot direction defined with respect to the gantry structure; anda patient couch operatively coupled with the radiation treatment head to provide movement of the patient couch relative to the radiation treatment head.2. The radiation treatment apparatus of claim 1 , wherein the radiation treatment head has pivotable movement in a maximum angle range greater than +/−30 degrees.3. The radiation treatment apparatus of claim 2 , wherein the patient couch and the radiation treatment head are movable to provide non-coplanar radiation treatment of a tissue volume.4. The radiation treatment apparatus of claim 3 , further comprising a controller operatively coupled with the patient couch and the radiation treatment head claim 3 , where to provide non-coplanar radiation treatment of a tissue volume the controller configured to control movement of the patient couch and gimbaling of the ...

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Номер записи: 95
18-03-2021 дата публикации

X-RAY IMAGING DEVICE AND METHOD FOR IMAGING BY USING SAME

Номер: US20210077038A1
Автор: Zhu Lei
Принадлежит:

The present application discloses an X-ray imaging device and a method of imaging using the X-ray imaging device. The X-ray imaging device comprises a rotating mechanism provided with a radiation source comprising a first radiation source and a second radiation source, the first radiation source and the second radiation source respectively emitting first light and second light, wherein the first light and the second light alternately irradiate a radiated body; and a detector for detecting the first light and the second light passing through the radiated body. 1. An X-ray imaging device comprising:a rotating mechanism provided with a radiation source comprising a first radiation source and a second radiation source, the first radiation source and the second radiation source respectively emitting first light and second light, wherein the first light and the second light alternately irradiate a radiated body; anda detector for detecting the first light and the second light passing through the radiated body.2. The X-ray imaging device according to claim 1 , wherein the detector is mounted on the rotating mechanism.3. The X-ray imaging device according to claim 2 , wherein the detector and the radiation source are mounted on two sides of the radiated body.4. The X-ray imaging device according to claim 1 , wherein the first radiation source and the second radiation source are pulsed radiation sources.5. The X-ray imaging device according to claim 1 , further comprising a light switching mechanism comprising a baffle that alternately blocks the first light and the second light.6. The X-ray imaging device according to claim 1 , further comprising a light switching mechanism comprising a first baffle and a second baffle claim 1 , wherein the first baffle and the second baffle alternately block the first light and the second light claim 1 , respectively.7. The X-ray imaging device according to claim 1 , wherein the first light and the second light are cone beam X-rays or fan- ...

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Номер записи: 96
18-03-2021 дата публикации

PROCESS FOR FABRICATING A DIGITAL BITE OPENING APPLIANCE DURING ORTHODONTIC TREATMENT

Номер: US20210077227A1
Автор: Griffin, III Alfred Charles, Winchell Dylan, Yarmarkovich Alexander
Принадлежит: LightForce Orthodontics, Inc

Embodiments may provide Bite Opening Devices (BODs) that are quicker and easier to place and provide improved accuracy. For example, a method may comprise using a computer system to perform: receiving data relating to teeth and jaws of a person, identifying a hinge axis of the jaw in three dimensional space using the data relating to teeth and jaws of a person, rotating the jaw to provide a desired clearance of the teeth, placing at least one Bite Opening Device on the teeth so as to provide the desired clearance of the teeth, and generating data defining a bonding tray to fit over the teeth, the bonding tray including a void corresponding to each Bite Opening Device, the generated data defining the bonding tray to be used for manufacturing the bonding tray using additive manufacturing. 1. A method comprising:using a computer system comprising a processor, memory accessible by the processor, and computer program instructions stored in the memory and executable by the processor to perform:receiving data relating to teeth and jaws of a person;identifying a hinge axis of the jaw in three dimensional space using the data relating to teeth and jaws of a person;rotating the jaw to provide a desired clearance of the teeth;placing at least one Bite Opening Device on the teeth so as to provide the desired clearance of the teeth; andgenerating data defining a bonding tray to fit over the teeth, the bonding tray including a void corresponding to each Bite Opening Device, the generated data defining the bonding tray to be used for manufacturing the bonding tray using additive manufacturing.2. The method of claim 1 , wherein each void is to be filled by a flowable or preformed bondable dental material to create separation of the dentition for orthodontic purposes.3. The method of claim 1 , wherein the material left by the void is configured to apply orthodontic vectors of force to the teeth by using masticatory forces.4. The method of claim 3 , wherein the masticatory forces ...

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Номер записи: 97
14-03-2019 дата публикации

MULTIRESOLUTION ITERATIVE RECONSTRUCTION FOR REGION OF INTEREST IMAGING IN X-RAY CONE-BEAM COMPUTED TOMOGRAPHY

Номер: US20190076101A1
Автор: CHANG Yu-Bing, Manak Joseph, Pan Xiaochuan, Xia Dan, ZHANG Zheng
Принадлежит:

A method and apparatus is provided to generate a multiresolution image having at least two regions with different pixel pitches. The multiresolution image is reconstructed using projection data having various pixel pitches corresponding to the pixel pitches of the multiresolution image. By using a higher resolution inside regions of interest (ROIs) in both the image and projection domains and lower resolution outside the ROIs, fast image reconstruction can be performed while avoiding truncation artifacts, which result imaging is limited to an ROI excluding attenuation regions. Further, those regions of greater clinical relevance and greater structural variance within the reconstructed images can be selected to be within the ROIs to improve the clinical benefit of the multiresolution image. The multiresolution image can be reconstructed using an iterative reconstruction method in which the high- and low-resolution regions are uniquely evaluated. 1. An apparatus , comprising: obtain projection data representing an intensity of radiation detected at a plurality of detector elements,', 'downsample the projection data to generate low-resolution projection data;', 'reconstruct a low-resolution image using the generated low-resolution projection data;', 'select a region within the low-resolution image to generate a first image-domain region of interest (ROI),', 'generate a first sinogram-domain ROI using a forward projection of the first image-domain ROI,', 'obtain, using the projection data, first ROI projection data representing the intensity of the radiation detected within the first sinogram-domain ROI, wherein the first ROI projection data has a smaller pixel pitch than the low-resolution projection data, and', 'reconstruct a multiresolution image having a low-resolution pixel pitch outside the first image-domain ROI and a first pixel pitch inside the first image-domain ROI, wherein the low-resolution pixel pitch is greater than the first pixel pitch., 'circuitry ...

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Номер записи: 98
22-03-2018 дата публикации

Method And Apparatus For Reconstructing Image Projections

Номер: US20180078226A1
Автор: Helm Patrick A., Shi Shuanghe
Принадлежит:

A method and system is disclosed for acquiring image data of a subject. The image data can be collected with an imaging system having a detector able to move relative to the subject. A contrast agent can be injected into the subject and image data can be acquired with the contrast agent in various phases of the subject. A volumetric model of multiple phases can be reconstructed selected reconstruction techniques. 1. A method reconstructing multiple phases of a vasculature of a subject , comprising:injecting a contrast agent into the vasculature of the subject at a selected injection start time;powering a x-ray source at a first power to emit x-rays to be detected by a detector at a selected imaging first time;powering the x-ray source at a second power to emit x-rays to be detected by a detector at a selected imaging second time;selecting the second power to have a voltage that is about 40 kV to about 60 kV different than the first power and an amperage that is about 20 mA to about 150 mA different than the first power;moving the x-ray source and the detector relative to the subject; andacquiring image data of a selected portion of the subject over an imaging period of time while (i) moving the x-ray source and the detector and (ii) switching between powering the x-ray source at the first power to emit x-rays to be detected by the detector and powering the x-ray source at the second power to emit x-rays to be detected by the detector, wherein the image data includes a plurality of image frames of the subject acquired over the imaging period of time at both (i) different positions relative to the subject based on the moving of the x-ray source and the detector and (ii) different powers;selecting a first phase of the vasculature of the subject;determining a first sub-plurality of image frames of the plurality of image frames that relate to the first phase in the subject;selecting a second phase of the vasculature of the subject;determining a second sub-plurality of ...

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Номер записи: 99
05-03-2020 дата публикации

Method for three-dimensional digital subtraction angiography and apparatus

Номер: US20200074700A1
Автор: Markus Kowarschik, Michael Manhart
Принадлежит: Siemens Healthcare GmbH

A method is provided for producing a high-resolution three-dimensional digital subtraction angiography image of an examination object. The method includes: providing or recording of a data set of a three-dimensional rotational run of an imaging system around the examination object without administration of contrast agent (e.g., mask run); motion compensation of the data set of the mask run by a method based on the epipolar consistency conditions; providing or recording of a data set of a three-dimensional rotational run of the imaging system around the examination object with administration of contrast agent (e.g., fill run); motion compensation of the data set of the fill run by a method based on the epipolar consistency conditions; reconstructing a first volume from the compensated data set of the mask run (e.g., mask volume) and a second volume from the compensated data set of the fill run (e.g., fill volume); rigid 3D-3D registration of the first volume and second volume relative to one another; and calculating a high-resolution three-dimensional digital subtraction angiography image by subtracting the mask volume from the fill volume.

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Номер записи: 100