公开(公告)号：US20080265887A1

公开(公告)日：2008-10-30

申请号：US11615324

申请日：2006-12-22

申请人： Anton M. Linz ,  Chang L. Kim ,  Jim L. Malaney ,  David L. McDaniel ,  Robert S. Stormont ,  Ricardo Becerra

发明人： Anton M. Linz ,  Chang L. Kim ,  Jim L. Malaney ,  David L. McDaniel ,  Robert S. Stormont ,  Ricardo Becerra

IPC分类号： G01R33/28 ,  G01T1/20

CPC分类号： G01R33/28 ,  G01R33/481 ,  G01T1/1603

摘要： A gamma ray detector ring for a combined positron emission tomography (PET) and magnetic resonance imaging (MRI) system is integrated into a radio frequency (RF) coil assembly such that the detector ring is integrated with a RF shield. Each gamma ray detector in the detector ring includes a scintillator component that emits light when a gamma ray is detected and a photodetector component designed to be sensitive to the frequency of light produced by the scintillator. A RF shield may be integrated into a detector ring such that the RF shield is positioned between the scintillator and photodetector components of each detector, thereby saving valuable radial space within the imaging system. Multiple such detector rings may be located adjacent to one another to increase axial coverage and enable three-dimensional PET imaging techniques.

摘要翻译： 用于组合正电子发射断层摄影（PET）和磁共振成像（MRI）系统的伽马射线检测器环集成到射频（RF）线圈组件中，使得检测器环与RF屏蔽集成。 检测器环中的每个伽马射线检测器包括当检测到伽马射线时发光的闪烁体部件和设计成对由闪烁体产生的光的频率敏感的光检测器部件。 RF屏蔽可以集成到检测器环中，使得RF屏蔽物位于每个检测器的闪烁体和光电检测器部件之间，从而在成像系统内节省有价值的径向空间。 多个这样的检测器环可以彼此相邻放置以增加轴向覆盖并且能够进行三维PET成像技术。

公开(公告)号：US20090067697A1

公开(公告)日：2009-03-12

申请号：US11851961

申请日：2007-09-07

申请人： Robert S. Stormont ,  Dahsen Chu

发明人： Robert S. Stormont ,  Dahsen Chu

IPC分类号： G06K9/00

CPC分类号： G01R33/365 ,  A61B5/055 ,  G01R33/3621

摘要： An apparatus for receiving magnetic resonance (MR) signals emitted by an imaging subject includes a receiver coil configured to detect the MR signals and a frequency translating preamplifier coupled to the receiver coil. The frequency translating preamplifier is configured to amplify the MR signals and to convert a frequency of the MR signals to an intermediate frequency. The frequency translating preamplifier may include an amplifier having a predefined gain, a frequency filter configured to filter at least one predetermined frequency and a mixer configured to convert the frequency of the MR signals to the intermediate frequency.

摘要翻译： 用于接收由成像对象发射的磁共振（MR）信号的装置包括被配置为检测MR信号的接收器线圈和耦合到接收器线圈的频率转换前置放大器。 频率转换前置放大器被配置为放大MR信号并将MR信号的频率转换为中频。 频率转换前置放大器可以包括具有预定增益的放大器，被配置为对至少一个预定频率进行滤波的频率滤波器和配置成将MR信号的频率转换为中频的混频器。

公开(公告)号：US5525906A

公开(公告)日：1996-06-11

申请号：US273577

申请日：1994-07-11

申请人： Carl R. Crawford ,  Matthew G. Eash ,  Steven P. Souza ,  Norbert J. Pelc ,  Dennis G. DallaPiazza ,  Daniel S. Small ,  Robert S. Stormont

发明人： Carl R. Crawford ,  Matthew G. Eash ,  Steven P. Souza ,  Norbert J. Pelc ,  Dennis G. DallaPiazza ,  Daniel S. Small ,  Robert S. Stormont

IPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/36 ,  G01R33/56 ,  G01R33/28

CPC分类号： G01R33/3621 ,  G01R33/5608

摘要： An MRI system includes a noise filter which receives each acquired NMR signal during a scan and detects short-duration noise pulses by sensing the signal level in a band of frequencies outside the imaging bandwidth. A blanking circuit suppresses the NMR signal during the time interval each noise pulse is detected to remove the noise pulse prior to image reconstruction.

摘要翻译： MRI系统包括噪声滤波器，其在扫描期间接收每个获取的NMR信号，并且通过感测成像带宽以外的频带中的信号电平来检测短持续时间的噪声脉冲。 消隐电路在时间间隔期间抑制NMR信号，每个噪声脉冲被检测以去除图像重建之前的噪声脉冲。

公开(公告)号：US4992736A

公开(公告)日：1991-02-12

申请号：US389456

申请日：1989-08-04

申请人： Robert S. Stormont ,  Michael C. Anas ,  Norbert J. Pelc

发明人： Robert S. Stormont ,  Michael C. Anas ,  Norbert J. Pelc

IPC分类号： G01R33/48 ,  A61B5/055 ,  G01N24/08 ,  G01R33/341 ,  G01R33/36

CPC分类号： G01R33/3678 ,  G01R33/3621 ,  G01R33/3607

摘要： A receiver processes an NMR signal to produce a baseband image information signal from which two quadrature component signals are derived. An intermediate frequency section mixes the received NMR signal with two reference signals to shift the image information into a frequency band having a bandwidth BW and centered at a frequency that is 1.5 times the bandwidth BW. The resultant signal is filtered to remove extraneous signals outside the image information band. An analog to digital converter samples the filtered signal at a rate that is twice the bandwidth BW and digitizes the samples into a digital signal. A quadrature detector derives I and Q output signals from the digital signal by alternately selecting digital samples and negating every other sample selected for each of the I and Q output signals. The quadature detector also digitally filters the I and Q signals which are then used to construct an NMR image.

公开(公告)号：US4952877A

公开(公告)日：1990-08-28

申请号：US392692

申请日：1989-08-11

申请人： Robert S. Stormont ,  Jeffrey P. Noonan ,  Norbert J. Pelc

发明人： Robert S. Stormont ,  Jeffrey P. Noonan ,  Norbert J. Pelc

IPC分类号： G01R33/48 ,  A61B5/055 ,  G01R33/36 ,  G01R33/58

CPC分类号： G01R33/583

摘要： The transceiver of an NRM instrument includes a digital synthesizer that produces an analog carrier signal which can be controlled in both frequency and phase and which can be frequency and phase modulated. The analog carrier signal is mixed with reference signals to boost its frequency to the Larmor frequency of the instrument.

公开(公告)号：US4951672A

公开(公告)日：1990-08-28

申请号：US136662

申请日：1987-12-22

申请人： Randall H. Buchwald ,  Robert S. Stormont ,  Jeffrey P. Noonan

发明人： Randall H. Buchwald ,  Robert S. Stormont ,  Jeffrey P. Noonan

IPC分类号： A61B5/0428

CPC分类号： G01R33/28 ,  A61B5/0428 ,  G01R33/3685 ,  A61N2001/086 ,  G01R33/288 ,  G01R33/5673 ,  Y10S128/901

摘要： An electrode assembly, particularly useful in nuclear magnetic resonance apparatus, for sensing a physical characteristic of a live study subject includes an electrode positioned in electrical contact with the subject for sensing the physical characteristic. The electrode assembly further includes a lead wire connected at one of its ends to the electrode and having an impedance selected to protect the study subject from heating. The impedance is also selected to have a low voltage coefficient of resistivity in order to prevent conversion of radio-frequency energy to ECG in-band energy.

摘要翻译： 特别可用于核磁共振装置的用于感测实况研究对象的物理特性的电极组件包括与受试者电接触以检测物理特性的电极。 电极组件还包括在其一端连接到电极并且具有被选择用于保护研究对象免受加热的阻抗的引线。 阻抗也被选择为具有低电阻系数，以防止射频能量转换成ECG带内能量。

公开(公告)号：US4737712A

公开(公告)日：1988-04-12

申请号：US948201

申请日：1986-12-31

申请人： Robert S. Stormont ,  Randall H. Buchwald ,  Ralph S. Hashoian

发明人： Robert S. Stormont ,  Randall H. Buchwald ,  Ralph S. Hashoian

IPC分类号： G01R33/32 ,  A61B5/00 ,  A61B5/0428 ,  A61B5/055 ,  A61M25/095 ,  G01R33/28 ,  G01R33/20

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

摘要： There is provided a power source for continuously energizing electrically isolated devices 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 is made up of a first element for generating energy of one type and a second element for receiving this energy and converting it to a second energy type used to energize the electrically isolated devices. The first and second elements are operatively coupled to one another through an electrically isolated medium 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 may be an array of light-emitting diodes, while the second element may be an array of photovoltaic cells. In another embodiment, the first and second elements may be ultrasonic transducers coupled through air or a ceramic substrate.