Method and system for obtaining dimension related information for a flow channel
Номер патента: EP1450679A2
Опубликовано: 01-09-2004
Автор(ы): Warren P. Heim
Принадлежит: Team Medical LLC
Опубликовано: 01-09-2004
Автор(ы): Warren P. Heim
Принадлежит: Team Medical LLC
Реферат: A method and system for determination of dimension related information such as volumetric flow rate(s) of a fluid flowing through a channel. In one implementation, the method and system analyzes temporal changes in a moving fluid's velocity profile to calculate the fluid dimensions. In turn, the fluid channel dimensions and the fluid velocity profile data may be combined to calculate the volumetric flow rate of the fluid flowing through the channel. In this regard, the geometry of the channel can be characterized using dimensionless variables that relate dimensions, such as the radius across a circular cross-section, to the largest extent of a dimension. One or more dimensionless variables can be used to characterizes geometries. The time required for velocity profiles to change from one shape to another may be characterized by dimensionless time. Dimensionless time, in turn, uses the fluid's viscosity and density along with time and overall channel dimensions and may be used in combination with at least one velocity profile to calculate the volumetric flow rate of the fluid flowing through the channel.
Method and magnetic resonance system for determining a coding for a flow measurement and for implementing a flow measurement with the coding
Номер патента: US20100145184A1. Автор: Andreas Greiser. Владелец: SIEMENS AG. Дата публикации: 2010-06-10.