Reconstruction method using direct and iterative techniques

A system and method for forming volumetric images of an imaged object based on multiple radiation measurements of the object taken from different angles. A first volumetric image of the object may be calculated using a direct reconstruction method from a plurality of radiation measurements of the object. At least one iteration of an iterative reconstruction method may be performed to compute a second volumetric image of the object. The iterative reconstruction method may be initialized with the first volumetric image of the object.

System and method for finding vehicle

A system for finding a vehicle includes a function controller, a key for matching with and controlling the function controller, and a portable device. The portable device can match with the key and transmit an instruction to the key. The key includes a first positioning module, and the function controller includes a second positioning module coupled to the first positioning module. The first positioning module and the second positioning module can receive data as to the distance between and respective locations of the chip key and the function controller. The present disclosure also discloses a method for finding vehicle.

Adaptive scanning in an imaging system

An imaging system exposes an object within a region to a beam of penetrating radiation. The beam of penetrating radiation is sensed on a side opposite the region from a source of the beam. An attenuation of the beam caused by passing the beam through the object is determined, the attenuation is compared to a threshold attenuation. If the attenuation exceeds the threshold attenuation, a parameter of the imaging system is adjusted based on the determined attenuation.

Moving-entity detection

A stepped-frequency radar signal is transmitted through a barrier. A transmitter of the stepped-frequency radar is on a first side of the barrier, a first object is on a second side of the barrier, and a second object that is distinct from the first object is on the second side of the barrier. A signal including a reflection of the transmitted signal from the first object and a reflection of the transmitted signal from the second object is sensed. The sensed signal is analyzed to determine that a first detection is associated with the first object and a second detection is associated with a second object.

Systems and methods for generating projection images

Systems, methods, and non-transitory computer-readable media taught herein process a subset of a three-dimensional array of voxels to form an image of a region of interest in an object. Images thus formed are clear, comprehensible, and contextual. The systems, methods, and non-transitory computer-readable media taught herein select the subset of voxels that represent the region of interest along a direction perpendicular to a view direction defined by the region of interest. The subset of voxels represents one or more portions of a plurality of image slices of the object.

3D mapping with two orthogonal imaging views

Methods, systems, and apparatuses, including computer programs encoded on a computer storage medium, for generating location and size measurements for small scattered objects in a large medium are disclosed.

Determination of heavy particle stopping power

A distribution of heavy particle stopping power is be determined. A distribution of effective atomic number of a three-dimensional space is accessed, and a distribution of an x-ray stopping power of the three-dimensional space is accessed. A conversion is applied to the distribution of the effective atomic number and the distribution of x-ray stopping power. A distribution of the heavy particle stopping power of the three-dimensional space is generated based on the conversion, the heavy particle stopping power being an indication of a depth of penetration for a heavy particle incident on the three-dimensional space.

Methods and apparatus for detection of contraband using terahertz radiation

An inspection system and methods for inspecting items using terahertz radiation that may be used to detect contraband (e.g., explosives, weapons and drugs) within items under inspection. Terahertz radiation may be transmitted through and/or reflected from an item. The density and/or a physical property of one or more regions within an item may be determined. Terahertz radiation may be used to inspect surface regions of an item and/or other regions of an item. Terahertz radiation may used in combination with and/or in addition to another inspection modality.

Irradiation system including an electron-beam scanner

A property of a treatment beam is controlled during a scanning period. A portion of a region is exposed to an imaging x-ray beam during a scanning period, the imaging x-ray beam being generated by an electron-beam scanner. X-ray radiation from the region is detected, the x-ray radiation representing an attenuation of the imaging x-ray beam caused by the portion of the region. A first image of the portion of the region is generated based on the detected x-ray radiation. A characteristic of the portion of the region is determined from the generated first image. An input derived from the characteristic is generated, the input configured to cause a source of a treatment beam to modify a property of the treatment beam. The source of the treatment beam modifies a property of the treatment beam during the scanning period by providing the input to the source of the treatment beam.

Material discrimination using single-energy x-ray imaging system

The present invention discloses a method for determining an atomic number of a location on a material using a radiation at a predetermined energy. The method comprises the steps of (i) generating the radiation at a first spectrum and a second spectrum penetrating through the location on the material; (ii) detecting a first profile corresponding to the first spectrum and a second profile corresponding to the second spectrum; and (iii) determining the atomic number of the material at the location based on the first profile and the second profile.

User interface for inspection system with isoluminant regions

An inspection system having a user friendly operator display. Characteristics of items under inspection are represented in the display by color and brightness. Each pixel on the display is assigned an intensity representation of a first characteristic of a region of an item, such as density. Color is assigned to each pixel based on anther characteristic of the regions, such as atomic number. The intensity assigned to each pixel in the display is based in part on the color assigned to that pixel so that each pixel representing the same value of the first characteristic will appear to a human with the same brightness, regardless of the color assigned to the pixels. Such a display is used in an x-ray inspection system to represent attenuation of x-rays by brightness and effective atomic number by color.

Adaptive scanning in an imaging system

An object within a region is exposed to a first beam of penetrating radiation. The first beam of penetrating radiation is sensed on a side opposite the region from a source of the first beam. An attenuation of the first beam caused by passing the first beam through the object is determined, the attenuation is compared to a threshold attenuation. If the attenuation exceeds the threshold attenuation, a parameter of a second of beam of penetrating radiation is adjusted based on the determined attenuation.

Contraband detection systems using a large-angle cone beam CT system

A contraband detection system using a cone beam computed tomography scanner. The cone beam scanner allows for rapid acquisition of data for computing three dimensional density maps of objects within items under inspection. Where greater resolution is desired, the image information obtained with the cone beam computed tomography scanner may be combined with higher resolution images formed with a single view scanner. A multi-energy single view scanner may be used to additionally provide information on the effective atomic number of objects contained within items under inspection. Additionally, information obtained with the cone beam computed tomography scanner may be used to increase the accuracy of the computation of the effective atomic number of objects within the item under inspection.

Stacked detectors

A representation of an amount of energy incident on a radiation sensor formed from multiple sens-ing elements coupled together along a direction parallel to a direction of propagation of the incident radiation is re-ceived. The radiation sensor has an adjustable border po-sitioned between any two of the multiple sensing ele-ments. From the representation, an amount of energy inci-dent on the radiation sensor is determined. A position of the border is selected based on the amount of energy inci-dent on the radiation sensor. After selecting the position of the border, an absorption characteristic of a region im-aged by the radiation sensor is determined.

Method and apparatus for detecting contraband using radiated compound signatures

An system for detecting contraband, particularly explosives or other energetic materials. The system includes a source of ionizing radiation that irradiates an item under inspection. The radiation stimulates the emission of RF energy from objects within the item under inspection. The characteristics of the emitted RF energy reveals information about the material composition of the objects. The system detects this emitted RF energy and comparers it to a signature of RF emissions from contraband objects. Apparatus to detect and analyze RF emissions may be constructed as a stand-alone unit or may be incorporated into an imaging system in which the ionizing radiation is used to form an image of the item under inspection. Similarly, the RF analysis may be used, in the first instance, to determine whether an object contains a contraband item or may be used as a second level analysis to clear alarms generated by analysis of images formed by the imaging system.

Sensor head

An apparatus includes an extendable wand, and a sensor head coupled to the wand. The sensor head includes a continuous wave metal detector (CWMD) and a radar. When the wand is collapsed, the wand and the sensor head collapse to fill a volume that is smaller than a volume filled by the sensor head and the wand when the wand is extended. Frequency-domain data from a sensor configured to sense a region is accessed, the frequency-domain data is transformed to generate a time-domain representation of the region, a first model is determined based on the accessed frequency-domain data, a second model is determined based on the generated time-domain representation, the second model being associated with a particular region within the sensed region, and a background model that represents a background of the region is determined based on the first model and the second model.

Detection of movable objects

Systems and methods for sensing targets on an opposite side of a wall are disclosed. In some aspects, the techniques include providing an indication to a user that portions of reflected radar signals were blocked by radiofrequency-blocking material at the wall. In some aspects, the techniques include identifying candidate targets as multipath echoes or motion-induced errors based on a correlation map.

Surveillance with reanalysis of screening data

A surveillance system may include at least one controller configured to receive information data from at least one information source and to control operation of at least one controllable subsequent information source based, at least in part, on the information data. A surveillance method may include analyzing screening data, obtaining information data, and reanalyzing the screening data based, at least in part, on the obtained information data.

Particle concentrator

Concentrating particles in a turbulent gas flow may include receiving, in a receptacle, a turbulent gas flow that includes particles. The concentration of particles in a gas flow exiting the receptacle at a first port is increased as compared with a concentration of the particles in the gas flow received by the receptacle. The increased concentration of particles is accomplished by removing a portion of the gas flow by using a second port, and fluidly communicating the gas flow through a tube in the receptacle. The tube has a smaller diameter at the end of the tube at which the gas flow exits the tube than diameter at the end of the tube at which the gas flow is received.

Adaptive scanning in an imaging system

An object within a region is exposed to a first beam of penetrating radiation. The first beam of penetrating radiation is sensed on a side opposite the region from a source of the first beam. An attenuation of the first beam caused by passing the first beam through the object is determined, the attenuation is compared to a threshold attenuation. If the attenuation exceeds the threshold attenuation, a parameter of a second of beam of penetrating radiation is adjusted based on the determined attenuation.

High throughput baggage inspection system

A stand-alone inspection system operating reliably with high throughput. The system employs automated image analysis to distinguish between cleared items and suspicious items. Cleared items pass through the inspection system without stopping, but the system stops suspicious items at a predetermined location so that the alarmed items can be readily identified by an operator. The system also displays information on the items that allows an operator to confirm that the item in the predetermined location is an alarmed item. Rather than resolving the alarmed item with the system stopped, the operator records an indicia of the alarmed item and the alarmed item is removed for further inspection or other processing. The recorded indicia provides a tracking mechanism that ensures alarmed bags are resolved.

Material analysis based on imaging effective atomic numbers

Effective atomic numbers associated with pixels in a region are received. An effective atomic number is associated with each pixel in the region. X-ray data for the region is received, and an item within the region is identified from the x-ray data. Some of the pixels in the region are correlated with the item such that the item is associated with an effective atomic number. An image of the region is rendered. The pixels of the item have a display style based on the effective atomic number of the item.

X-ray inspection system

X-ray imager with sparse detector array

A system and method for imaging objects with a sparse detector array that includes fewer detectors than conventional x-ray scanning systems. The sparse detector array is positioned to receive x-ray radiation from the at least one x-ray source after passing through an inspection area. The sparse detector array includes a plurality of rows of detector elements, wherein at least some of the plurality of rows are separated by gaps such that the at least some of the plurality of rows are non-contiguous. An iterative reconstruction process is used to determine a volumetric image of the object from the radiation measurements recorded by the detectors in the sparse detector array.

Dual energy X-ray source

A dual energy X-ray source for use in an explosive detection system includes only a single power supply and only a single X-ray tube. The X-ray tube includes only two electron guns and only a single anode. Each electron gun has its own grid and cathode. The X-ray source switches between producing a higher energy X-ray and producing a lower energy X-ray at a frequency of at least 4000 Hz.

Increased throughput inspection station

A method and apparatus for inspecting items for the presence of contraband. Trays may be used to hold items as they move through an inspection station. After use, the trays may be mechanically conveyed back to an entry region of the inspection station so that the trays may be used to move other items. Mechanically conveying the trays may enable increased throughput for inspection stations. A tray return may be constructed from multiple modules positioned to the side of an inspection machine. In use at an airport or other similar facility, the tray return may face a passenger use area at an inspection station. Passengers exiting the inspection station may place trays in the tray return. Passengers entering the inspection station may remove a tray from an end of the tray return at an entrance of the inspection station.

Offset feed antennas

An apparatus for detecting objects includes a transceiver configured to generate a radar signal, a radar having a transmit antenna configured to transmit the radar signal, and a receive antenna configured to sense a return signal in response to a transmission of the radar signal. The apparatus also includes a processor configured to detect an object based on the return signal. One or more of the transmit antenna or the receive antenna include offset spiral feed antennas.

Material analysis based on imaging effective atomic numbers

Effective atomic numbers associated with pixels in a region are received. An effective atomic number is associated with each pixel in the region. X-ray data for the region is received, and an item within the region is identified from the x-ray data. Some of the pixels in the region are correlated with the item such that the item is associated with an effective atomic number. An image of the region is rendered. The pixels of the item have a display style based on the effective atomic number of the item.

Security system with distributed computing

A security system with a processor that receives information from multiple sources. The system is illustrated by a network of inspection machines at multiple locations in an airport, such as at check-in desks. These machines provide data to the processor for threat detection processing. The processor provides a central control and data integration point. Centralized control may be used to readily adapt threat detection programs and data integration may allow more accurate or more thorough threat determinations to be made. Moreover, centralized processing of computation intensive operations, such as image reconstruction, may provide for more efficient processor utilization throughout the system, providing a lower total processing cost. Additionally, centralized processing allows for human decision makers to be readily integrated into the system.

Inspection system with data acquisition system interconnect protocol

An improved interconnection protocol that is well suited for use in an inspection system or similar modular electronic system. Communication is provided over a network where the electronic modules are nodes, including a root node and multiple remote nodes. The root node and remote nodes are connected through multiple point-to-point synchronous links. The root node and remote nodes are configured to send and receive packets in either a short form or a normal form. Timing between the root node and remote nodes is provided by an external clock distributed by the root node. Each remote node responds to commands with low latency. This protocol allows normal packets to be configured to provide variable payload length, with a maximum payload size that yields a low protocol overhead.

Method and apparatus to detect event signatures

A security system for use in connection with cargo containers and other enclosed spaces. The system monitors vibrations associated with a container and detects signals representative events indicating that an unauthorized access has been made to the container. The system may be programmed with a library of event signatures, allowing different types of events to be detected. The system may be provided with a library of signatures representing a heart beating with a beat pattern and the system may be used to detect a human or other animal within the container. Alternatively, the system may be provided with a library of signatures representing piercing the container. The system may be used to monitor containers in transit. Indications of events may be stored while the container is in transit and then communicated at a security check point.

Detecting contraband by employing interactive multiprobe tomography

An inspection system for detecting a specific material of interest in packages includes a multi-view X-ray inspection probe (30) and one or more material sensitive probes. The multi-view X-ray inspection probe employs X-rays transmitted through or scattered from an examined item (14A; 14B) to identify a suspicious region (155) inside the item. An interface (110) is used to receive from the X-ray inspection probe X-ray data providing spatial information about the suspicious region and to provide this information to a selected material sensitive probe (140, 275). The material sensitive probe then acquires material specific information about the previously identified suspicious region and provides it to a computer to identify presence of the specific material in the suspicious region. The material sensitive probe may be a directional probe such as a coherent scatter probe, or a non-directional probe such as a Compton scatter probe or an NQR probe.

Reconstruction of x-ray images into basis function components using multiple-energy sources

Material discrimination system

This disclosure relates to systems and methods for material discrimination. The systems and methods include a single source that generates both neutrons and photons, and a single imaging array with a common detector that detects the neutrons and the photons generated from the single source. The systems and methods allow for a determination of the contents, and/or the effective atomic number (“Z”) of the contents, of an object without physical inspection of the interior of the object.

Folded array CT baggage scanner

A reduced size CT scanner for baggage inspection has a wide angle x-ray source and multiple sets of detectors at different distances from the x-ray source. The detectors in each set are sized and positioned to maintain consistent pitch and flux levels among all detectors. Conventional reconstruction processes can be used to process the data from the CT scanner. The scanner may also be incorporated into a check-in desk in a network of scanners.

Article positioner for a conveyor system

A method and apparatus for reducing the likelihood of an article becoming jammed in a conveyor system. The width of an article, like luggage, may be detected and the article rotated if the width is greater than a threshold value. A jammed article in the conveyance system may be detected, and repositioned by a positioner, to clear the jam. Spacing between articles in the conveyor system may also be controlled.

Adaptive scanning in an imaging system

An object within a region is exposed to a first beam of penetrating radiation. The first beam of penetrating radiation is sensed on a side opposite the region from a source of the first beam. An attenuation of the first beam caused by passing the first beam through the object is determined, the attenuation is compared to a threshold attenuation. If the attenuation exceeds the threshold attenuation, a parameter of a second of beam of penetrating radiation is adjusted based on the determined attenuation.

X-ray imager with sparse detector array

A system and method for imaging objects with a sparse detector array that includes fewer detectors than conventional x-ray scanning systems. The sparse detector array is positioned to receive x-ray radiation from the at least one x-ray source after passing through an inspection area. The sparse detector array includes a plurality of rows of detector elements, wherein at least some of the plurality of rows are separated by gaps such that the at least some of the plurality of rows are non-contiguous. An iterative reconstruction process is used to determine a volumetric image of the object from the radiation measurements recorded by the detectors in the sparse detector array.

High throughput baggage inspection system

Inspection system with data acquisition system interconnect protocol

Rotatable cylinder dual beam modulator

A dual beam modulator (10) includes a rotatable cylinder (12) having annular walls (14, 15) and a set of a plurality of discrete chordal passages (18) extending through the walls between opposing holes in the outer surface of cylinder walls (14, 15). Each of the passages (18) is spaced radially about each of the walls (14, 15) and longitudinally in the direction of the longitudinal axis of the cylinder (12) for producing, in response to an incident fan beam of radiation (30), a series of discrete pencil beams (28) as the cylinder (12) rotates. The cylinder (12) further has reduced radius sections (16, 17) on the outer surface of the walls (14, 15) for periodically passing the incident fan beam (30) alternately with the series of pencil beams (28) as the cylinder (12) rotates.

Imaging system with long-standoff capability

An imaging system that can form an image of an item under inspection using scattered radiation. A pencil beam of radiation is steered over the item under inspection and scattered radiation is detected. Regions of the item under inspection form which radiation is scattered are resolved in three dimensions using two-dimensional coordinates to which the pencil beam is steered. The third dimension is resolved using time of flight from the source. Because the inspection system can be located on one side of an item under inspection, an item may be imaged from a long distance and the imaging system may be mounted on a moving vehicle, making the imaging system well suited for use in many security inspection systems to detect explosives and other contraband items.

Multi-source surveillance systems

A surveillance system is disclosed. In some embodiments, the surveillance system may include a controller configured to receive information data from an upstream information source and to control operation of a downstream information source based on the information data. In some embodiments, the system may include a first screening apparatus adapted to screen a subject in a subject position, a second screening apparatus adapted to screen the subject in the subject position, and a controller adapted to produce first and second screening data from the first and second screening apparatus, relate the screening data, and produce relational information data from the related screening data. A surveillance method also is disclosed. In some embodiments, the method may include analyzing screening data, obtaining information data, and reanalyzing the screening data based on the obtained information data. In some embodiments, the method may include associating, with respective identifiers, a person and carried items.

X-ray imager with sparse detector array

A system and method for imaging objects with a sparse detector array that includes fewer detectors than conventional x-ray scanning systems. The sparse detector array (314) is positioned to receive x-ray radiation from the at least one x-ray source (312) after passing through an inspection area. The sparse detector array includes a plurality of rows of detector elements (316), wherein at least some of the plurality of rows are separated by gaps such that the at least some of the plurality of rows are non-contiguous. An iterative reconstruction process is used to determine a volumetric image of the object from the radiation measurements recorded by the detectors in the sparse detector array.

Material discrimination system using both neutrons and photons

This disclosure relates to systems and methods for material discrimination. The systems and methods include a single source (105) that generates both neutrons and photons, and a single imaging array (115) with a common detector (110) that detects the neutrons and the photons generated from the single source (105). The systems and methods allow for a determination of the contents, and/or the effective atomic number ("Z") of the contents of an object (102) without physical inspection of the interior of the object (102).

Methods and apparatus for e-beam scanning

In one aspect, an x-ray scanning device is provided. The x-ray scanning device comprises a target adapted to convert electron-beam (e-beam) energy into x-ray energy, a detector array positioned to detect at least some x-rays emitted from the target, and a conveyer mechanism adapted to convey items to be inspected through an inspection region formed by the target and the detector array, wherein the target and the detector array are rotated out of alignment with each other such that x-rays emitted from the target impinge on diametrically positioned detectors of the detector array without passing through near-side detectors of the detector array.

A remote baggage screening system, software and method

A method of advance baggage screening (104, 106) includes steps of transmitting a threat file (532) corresponding to an item under inspection to a processing center, analyzing the treat file according to a detection algorithm (530) at the processing center to determine a screening result for the item under inspection, and transmitting the screening result to a remotely located operator interface for access by an operator.

A remote baggage screening system, software and method

A method of advance baggage screening (104, 106) includes steps of transmitting a threat file (532) corresponding to an item under inspection to a processing center, analyzing the treat file according to a detection algorithm (530) at the processing center to determine a screening result for the item under inspection, and transmitting the screening result to a remotely located operator interface for access by an operator.

Miniature quadrupole arrays using electron multiplication detectors

A gas sensor includes a first chamber containing a plurality of evenly spaced rods having voltages applied thereto to cause gas ions in the first chamber to move in a direction from a first end of the first chamber to a second end of the first chamber and a second chamber coupled to the second end of the first chamber and having at least one ion detector, where ions pass from the first chamber to the second chamber through a plurality of channels between the first chamber and the second chamber and are detected by the at least one ion detector. The voltages applied to the rods may include a first voltage applied to a first subset of the rods and a second voltage applied to a second subset of the rods, each of first and second voltages containing a DC component and an AC component.

画像処理のためのシステムおよび方法

放射線撮影画像を使用して輸送コンテナ内の物体を特定するためのシステムおよび方法が、説明される。より詳細には、輸送コンテナの放射線撮影画像および関連する貨物積荷目録を分析するために人工ニューラルネットワークを使用するための技術が、説明される。

画像処理のためのシステムおよび方法

Method and apparatus for transmitting information about a target object between a prescanner and a ct scanner

A method or apparatus for analyzing an object includes an X-ray prescanner (1) that performs a prescan of the object to determine prescan information about the object. Then, a computer tomography (CT) scanner (3) performs a CT scan on at least one plane of the object based on the prescan information to determine CT information. In one embodiment, if the CT scan of the object includes or is in the vicinity of metal, then metal artifact correction of a reconstructed image from the CT scan is performed based on the prescan information. In another embodiment, a processor (5) analyzes the CT information and the prescan information to determine whether to update the prescan information based on the CT information.

Method and apparatus for transmitting information about a target object between a prescanner and a ct scanner

Method and apparatus for transmitting information about a target object between a prescanner and a ct scanner

Nebeneinander-detectoranordnung für röntgen -bilderzeugungssystem mittels zweier energie-spektren

Nachweis von sprengstoffen und anderer schmuggelware unter verwendung transmittierter und gestreuter röntgenstrahlung

Systems and methods for image reconstruction at high computed tomography pitch

Methodologies, systems, apparatus, and non-transitory computer-readable media are described herein to facilitate acquisition of volumetric data and volumetric image reconstruction. An imaging system can be configured to transport an object at a speed relative to the scan path of an X-ray source such that insufficient measurement data is collected for classically complete geometrical coverage. Iterative image reconstruction techniques may be used to generate volumetric images based on measured volumetric data of at least a portion of the object.

Methods and apparatus for e-beam scanning

In one aspect, an x-ray scanning device is provided. The x-ray scanning device comprises a target adapted to convert electron-beam (e-beam) energy into x-ray energy, a detector array positioned to detect at least some x-rays emitted from the target, and a conveyer mechanism adapted to convey items to be inspected through an inspection region formed by the target and the detector array, wherein the target and the detector array are rotated out of alignment with each other such that x-rays emitted from the target impinge on diametrically positioned detectors of the detector array without passing through near-side detectors of the detector array.

Methods and apparatus for e-beam scanning

In one aspect, an x-ray scanning device is provided. The x-ray scanning device comprises a target adapted to convert electron-beam (e-beam) energy into x-ray energy, a detector array positioned to detect at least some x-rays emitted from the target, and a conveyer mechanism adapted to convey items to be inspected through an inspection region formed by the target and the detector array, wherein the target and the detector array are rotated out of alignment with each other such that x-rays emitted from the target impinge on diametrically positioned detectors of the detector array without passing through near-side detectors of the detector array.

Dual energy imaging system

A dual energy inspection system that generates X-rays with an electron beam scanned over targets. A switchable voltage source that can be change its voltage output may cause X- rays to be generated at different energies. This X-ray generation subsystem is controlled by a sequencer that provides beam steering and shaping control inputs that may be dependent on the voltage provided by the voltage source. In another aspect, the dual energy inspection system may use multiple types of detectors, each sensitive to X-rays of a different energy. A relatively small number of detectors sensitive to one energy level is provided. Nonetheless, dual energy measurements may be made on objects within an item under inspection by identifying points that, for each object of interest, provide a low interference path to one of those detectors. Measurements made with radiation emanating from those points are used for dual energy analysis of those objects.

高いコンピュータ断層撮影ピッチでの画像再構成のためのシステムおよび方法

容積データおよび容積画像再構成の取得を容易にする方法、システム、装置、および非一時的コンピュータ可読媒体について、本明細書で説明する。画像化システムが、古典的に完全なジオメトリのカバレージには不十分な測定データが収集されるようなX線ソースの走査経路に対する速度でオブジェクトをトランスポートするように構成され得る。オブジェクトの少なくとも一部分の測定済み容積データに基づいて、容積画像を生成するために、反復画像再構成技法が使用され得る。

高いコンピュータ断層撮影ピッチでの画像再構成のためのシステムおよび方法

Gated continuous wave radar

Methods, systems, and apparatus for transmitting a first set of continuous wave (CW) signals, where each CW signal of the first set of CW signals has a first signal frequency and the transmitter is turned off between transmission of each CW signal of the first set of CW signals. For each CW signal of the first set of CW signals, receiving a reflection of the CW signal, and selecting an analog to digital (A/D) sample of the reflection of the CW signal that does not contain ground reflections by selecting the A/D sample based on timing from the transmitter being turned off after transmission of the CW signal. Integrating the selected A/D samples from each of the CW signals of the first set of CW signals to obtain a single A/D sample for the first set of CW signals.

個人乗客情報の機密保護と航空路安全の保証

本出願は、検査中の物品について収集されたデータの遠隔アクセスおよび分析のためのシステムおよび方法を開示する。このシステムはデータ収集ステーションを含み、このデータ収集ステーションには、物品についてのデータを取得するために検査中の物品をスキャンするＸ線スキャナーを含めてもよい。このデータは、１つまたは２つ以上の遠隔エキスパートステーションに伝送されて、そこで遠隔エキスパートがデータを分析して、その物品が、例えば爆破物またはその他の禁制品などの潜在的な脅威を含むかどうかを判定する。

Deteccion de explosivos u otros objetos de contrabando mediante el uso de rayos x transmitidos y dispersados.

SE PRESENTA UN DISPOSITIVO DE INSPECCION DE RAYOS X (10) PARA DETECTAR UN MATERIAL ESPECIFICO DE INTERES EN ITEMS DE DIFERENTES TAMAÑOS Y FORMAS (24A, 24B, 24C) QUE INCLUYE UN SISTEMA DE FUENTE DE RAYOS X SITUADO EN UNA REGION DE INSPECCION Y CONSTRUIDO PARA EXPONER EL ITEM EXAMINADO A AL MENOS UN HAZ DE RADIACION DE RAYOS X, Y UNO O MAS SISTEMAS DE DETECCION DE RAYOS X (60, 80, 100). EL DISPOSITIVO DE INSPECCION DE RAYOS X TAMBIEN INCLUYE UNO O MAS DETECTORES DE DIMENSIONES (120) CONSTRUIDOS PARA MEDIR UNA DIMENSION SELECCIONADA DEL ITEM EXAMINADO, UN SISTEMA DE INTERFAZ CONECTADO PARA RECIBIR LOS DATOS DE LOS RAYOS X Y LOS DATOS DE DIMENSIONES, Y UN ORDENADOR PROGRAMADO PARA UTILIZAR LOS DATOS PARA EL RECONOCIMIENTO DE UN MATERIAL ESPECIFICO DE INTERES Y PARA INDICAR SU PRESENCIA EN EL ITEM EXAMINADO. CADA SISTEMA DE DETECCION INCLUYE UNA O MAS MATRICES DE DETECTORES DE RAYOS X DISPUESTAS EN UNA GEOMETRIA LINEAL, CIRCULAR O SEMIESFERICA.

Rotatable cylinder dual beam modulator

A dual beam modulator (10) includes a rotatable cylinder (12) having annular walls (14, 15) and a set of a plurality of discrete chordal passages (18) extending through the walls between opposing holes in the outer surface of cylinder walls (14, 15). Each of the passages (18) is spaced radially about each of the walls (14, 15) and longitudinally in the direction of the longitudinal axis of the cylinder (12) for producing, in response to an incident fan beam of radiation (30), a series of discrete pencil beams (28) as the cylinder (12) rotates. The cylinder (12) further has reduced radius sections (16, 17) on the outer surface of the walls (14, 15) for periodically passing the incident fan beam (30) alternately with the series of pencil beams (28) as the cylinder (12) rotates.

Reference detector for correcting fluctuations in dose and energy of x-ray sources

Systems and methods presented herein provide corrections for fluctuations in dose or energy of radiation sources including x-ray radiation sources. The corrections can be applied to improve the quality of transmission radiography data or other radiation imagery or to facilitate feedback control of a radiation source to improve stability.

Compact e-beam source for generating x-rays

Various novel apparatuses and methods for generating X-rays are disclosed. One or more e-beam generators are oriented at non-conventional locations with respect to the target of the device.

コンピュータ断層撮影ボリュームからの投影画像を再構成するためのシステムおよび方法

3次元コンピュータ断層撮影ボリュームから最小限のアーティファクトを有する物体の高解像度2次元投影画像の生成を容易にするシステム、方法、および非一時的コンピュータ可読媒体が本明細書で説明される。物体の少なくとも一部の高解像度2次元投影画像を生成するために、基準に従う測定データを識別し、選択するためのビニングと、初期ボリュームデータの再サンプリングと協働して、直接または反復画像再構成技法を使用することができる。

コンピュータ断層撮影ボリュームからの投影画像を再構成するためのシステムおよび方法

Ensuring airline safety while safeguarding personal passenger information

The application discloses a system and methods for remote access and analysis of data collected about items under inspection. The system includes a data collection station, that may include an X-ray scanner, that scans the items under inspection to obtain data about the items. The data is transmitted to one or more remote expert stations, where a remote expert analyzes the data to determine whether the item contains a potential threat, such as, for example, explosives or other contraband.

A remote baggage screening system, software and method

A remote baggage screening system, software and method

Radiation scanning systems and methods

A method for operating an inspection system is disclosed in which an item under inspection may be moved in a first direction relative to and at least partially between at least one radiation source and at least some radiation detectors illuminated by the at least one radiation source. The radiation source and detectors may be operated such that ray paths extending linearly between the at least one radiation source and at least some of the radiation detectors form acute angles with respect to a plane having a normal direction coinciding with the first direction that are substantially in excess of three degrees. Data accumulated by the radiation detectors may be processed to form a three-dimensional tomographic data image of at least a portion of the item under inspection. In some embodiments, transmission data based upon outputs of a plurality of radiation detectors may be processed to form a tomographic image, in which, for all possible orientations of a three dimensional plane, the orientation vectors of at least some of the rays of radiation for which transmission data was accumulated and used to form the tomographic image form an angle of less than eighty-five degrees or greater than ninety five degrees with respect to the plane.

Agile sensing for radar and metal detection

Methods, systems, and apparatus for transmitting a first set of stepped-frequency CW signals having first signal parameters, where the first signal parameters includes a first bandwidth and a first step size between signal frequencies. Detecting reflections of the first set of transmitted CW signals. Identifying an indication of a potential target in a frequency range of the reflections of the first set of transmitted CW signals from the detected reflections of the first set of transmitted CW signals. Determining second signal parameters for a second set of stepped-frequency CW signals in response to identifying the indication of the potential target. The second signal parameters include a second bandwidth and a second step size between signal frequencies, and where the second signal parameters focus on the frequency range in which the indication of the potential target is identified. Transmitting the second set of CW signals.