公开(公告)号：EP0568380B1

公开(公告)日：1997-09-17

申请号：EP93303387.0

申请日：1993-04-29

申请人： GENERAL ELECTRIC COMPANY

发明人： Richards, Karl Timothy ,  Jansta, Donald Robert ,  Buchwald, Randall Henry ,  Lijewski, Robert Ray

IPC分类号： A61B5/00 ,  A61B5/055 ,  G01R33/28

CPC分类号： G01R33/28 ,  A61B5/055 ,  A61B5/14552

公开(公告)号：EP0568380A1

公开(公告)日：1993-11-03

申请号：EP93303387.0

申请日：1993-04-29

申请人： GENERAL ELECTRIC COMPANY

发明人： Richards, Karl Timothy ,  Jansta, Donald Robert ,  Buchwald, Randall Henry ,  Lijewski, Robert Ray

IPC分类号： A61B5/00 ,  A61B5/055 ,  G01R33/28

CPC分类号： G01R33/28 ,  A61B5/055 ,  A61B5/14552

摘要： A magnetic resonance imaging system has a electromagnet coil assembly for exciting nuclei of an animal placed within the assembly and a mechanism to receive magnetic resonance signals from the nuclei and reconstruct an image of the animal from those signals. A plethysmograph is provided to sense the peripheral arterial pulse of the animal and gate the MRI system. A sensor for the plethysmograph includes a fiber optic cable having a pair of optical fibers which extend into the magnet assembly. A probe is connected to one end of the cable and is adapted to be attached to a digit of the animal so that ends of the optical fibers are adjacent the animal's skin. The other end of the cable couples to a circuit which sends light through one of the optical fibers to the probe, and which receives light returned from the probe through the other optical fiber. The circuit produces an electrical signal corresponding to the intensity of light received from the other optical fiber.

摘要翻译： 磁共振成像系统具有用于激发放置在组件内的动物的核的电磁线圈组件，以及从该核接收磁共振信号并从那些信号重构动物图像的机构。 提供体积描记器来感测动物的外周动脉并对MRI系统进行门控。 用于体积描记器的传感器包括具有延伸到磁体组件中的一对光纤的光纤电缆。 探针连接到电缆的一端并适于附着到动物的数字上，使得光纤的端部与动物的皮肤相邻。 电缆的另一端耦合到将光通过其中一根光纤发送到探头的电路，并且通过另一根光纤接收从探针返回的光。 电路产生对应于从另一光纤接收的光的强度的电信号。

公开(公告)号：EP0275699A1

公开(公告)日：1988-07-27

申请号：EP87311353.4

申请日：1987-12-23

申请人： GENERAL ELECTRIC COMPANY

发明人： Stormont, Robert Steven ,  Hashoian, Ralph Sarkis ,  Buchwald, Randall Henry

IPC分类号： A61B5/04 ,  H03K17/687

CPC分类号： G01R33/28 ,  A61B5/04282 ,  A61B5/055

摘要： There is provided a power source (124) for continuously energizing electrically isolated devices (110, 112) used to monitor the physiological state of a subject undergoing an examination in an NMR scanner having a magnet, RF and gradient coils. The power source (124) is made up of a first element (126) for generating energy of one type and a second element (128) for receiving this energy and converting it to a second energy type used to energized the electrically isolated devices. The first and second elements are operatively coupled to one another through an electrically isolated medium (130) to permit continuous transfer of energy from the first to the second element and to reject interference due to the NMR apparatus subsystems.
In one embodiment the first element (126) may be an array of light-emitting diodes (138), while the second element (128) may be an array of photovoltaic cells (140). In another embodiment, the first and second elements may be ultrasonic transducers coupled through air or a ceramic substrate (146).

摘要翻译： 提供了一种用于连续激励电隔离装置（110，112）用于监视在NMR扫描器具有磁体，RF和线圈接受检查的梯度在受试者的生理状态的功率源（124）。 所述动力源（124）由用于产生一种类型的能量和用于接收该能量并将其转换成用于通电的电隔离装置的第二能量类型的第二元件（128）的第一元件（126）的。 所述第一和第二元件可操作地通过在电隔离介质（130），耦合到彼此，以允许从所述第一能量的连续传递到第二元件，拒绝由于NMR装置子系统的干扰。 在一个实施例中的第一元件（126）可以是发光二极管（138）阵列，而第二元件（128）可以在光伏电池（140）的阵列。 实施例。在又一个中，第一和第二元件可以是通过空气或陶瓷衬底（146），其耦合超声换能器。