专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20080265887A1 SYSTEM AND APPARATUS FOR DETECTING GAMMA RAYS IN A PET/MRI SCANNER 有权
标题翻译：用于检测PET / MRI扫描仪中的GAMMA RAYS的系统和装置
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。

2. 发明授权

US07667457B2 System and apparatus for detecting gamma rays in a PET/MRI scanner 有权
标题翻译：用于检测PET / MRI扫描仪中的γ射线的系统和装置
公开(公告)号：US07667457B2
公开(公告)日：2010-02-23
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： G01V3/00
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。

3. 发明授权

US06396268B1 Magnetic resonance imaging device having magnetic field disturbance compensation 失效
标题翻译：具有磁场干扰补偿的磁共振成像装置
公开(公告)号：US06396268B1
公开(公告)日：2002-05-28
申请号：US09677410
申请日：2000-10-02
申请人： Richard S. Hinks , Scott T. Mansell , Michael J. Radziun , Dewain A. Purgill , Anton M. Linz , Darren L. Hallman
发明人： Richard S. Hinks , Scott T. Mansell , Michael J. Radziun , Dewain A. Purgill , Anton M. Linz , Darren L. Hallman
IPC分类号： G01V300
CPC分类号： G01R33/389
摘要： A magnetic resonance imaging device has a compensation circuit for compensating for magnetic disturbances therein. The compensation circuit includes a sensor for sensing magnetic field changes and generating a magnetic field change signal. The sensor is coupled to a control circuit that has a transfer function therein. The control circuit is used to generate a compensation signal in response to the magnetic field change signal. The compensation signal may be coupled to the compensation coils located by the first magnet portion and the second magnet portion of the device. Also, the compensation signal may produce a time-dependent bias or change the center frequency to cancel magnetic disturbances.
摘要翻译：磁共振成像装置具有用于补偿其中的磁干扰的补偿电路。补偿电路包括用于感测磁场变化并产生磁场变化信号的传感器。传感器耦合到其中具有传递函数的控制电路。控制电路用于响应于磁场变化信号产生补偿信号。补偿信号可以耦合到由设备的第一磁体部分和第二磁体部分定位的补偿线圈。此外，补偿信号可能产生时间偏移或改变中心频率以消除磁扰动。

4. 发明申请

US20090206839A1 SYSTEM, METHOD AND APPARATUS FOR COMPENSATING FOR DRIFT IN A MAIN MAGNETIC FIELD IN AN MRI SYSTEM 审中-公开
标题翻译：用于补偿MRI系统中主磁场中DRIFT的系统，方法和装置
公开(公告)号：US20090206839A1
公开(公告)日：2009-08-20
申请号：US12034244
申请日：2008-02-20
申请人： Derek A. Seeber , Anton M. Linz
发明人： Derek A. Seeber , Anton M. Linz
IPC分类号： G01V3/00 , H01F6/00
CPC分类号： G01R33/3815 , G01R33/3875 , G01R33/389
摘要： A method for compensating for drift in a main magnetic field of a superconducting magnet in a magnetic resonance imaging (MRI) system includes measuring a pressure in a cryostat of the superconducting magnet. Based on the pressure, a parameter of an element of the MRI system is adjusted to correct or compensate for a change in the main magnetic field.
摘要翻译：用于补偿磁共振成像（MRI）系统中的超导磁体的主磁场中的漂移的方法包括测量超导磁体的低温恒温器中的压力。基于压力，调整MRI系统的元件的参数以校正或补偿主磁场的变化。

5. 发明授权

US6008648A Method for producing physical gradient waveforms in magnetic resonance imaging 失效
标题翻译：在磁共振成像中产生物理梯度波形的方法
公开(公告)号：US6008648A
公开(公告)日：1999-12-28
申请号：US985019
申请日：1997-12-04
申请人： Anton M. Linz , Jason A. Polzin , Paul E. Licato , Graeme C. McKinnon
发明人： Anton M. Linz , Jason A. Polzin , Paul E. Licato , Graeme C. McKinnon
IPC分类号： G01R33/385 , G01V3/00
CPC分类号： G01R33/3852 , G01R33/385
摘要： An MRI system produces magnetic field gradients along physical axes during a patient scan. The gradients are specified as logical gradient waveforms in a pulse sequence and these are stored in a logical vector table. A physical vector table is produced by rotating amplitude values in the logical vector table, and the resulting rotated amplitude values are used to calculate the heating in each gradient axis of the MRI system.
摘要翻译： MRI系统在患者扫描期间沿物理轴产生磁场梯度。梯度被指定为脉冲序列中的逻辑梯度波形，并将它们存储在逻辑矢量表中。通过旋转逻辑矢量表中的振幅值产生物理矢量表，并且使用所得到的旋转振幅值来计算MRI系统的每个梯度轴中的加热。

6. 发明授权

US06271666B1 Filtering of oscillatory B0 behavior in NMR devices 失效
标题翻译： NMR装置中振荡B0行为的滤波
公开(公告)号：US06271666B1
公开(公告)日：2001-08-07
申请号：US09316801
申请日：1999-05-21
申请人： Anton M. Linz , Kevin F. King
发明人： Anton M. Linz , Kevin F. King
IPC分类号： G01V300
CPC分类号： G01R33/56518 , G01R33/56563
摘要： The present invention, in one form, provides compensation for the effects of an oscillatory B0 eddy current Be(t) in an NMR apparatus. In an NMR apparatus having a transmitter generating a spin excitation signal and a receiver detecting an NMR signal, applied gradient signals are analyzed to estimate a resulting oscillatory B0 eddy current Be(t). The frequency of either the transmitter or the receiver of the NMR apparatus, or both, is shifted in frequency by an amount proportional to Be(t) to achieve compensation. The applied gradient signals are digitized and filtered using a recursive filter that is based upon an oscillatory model of the oscillatory B0 eddy current Be(t)
摘要翻译：本发明以一种形式提供对NMR装置中振荡B0涡流Be（t）的影响的补偿。在具有产生自旋激发信号的发射器和检测NMR信号的接收机的NMR装置中，分析所施加的梯度信号以估计得到的振荡B0涡流Be（t）。 NMR装置的发射器或接收器或两者的频率以与Be（t）成比例的量的频率偏移以实现补偿。使用基于振荡B0涡流Be（t）的振荡模型的递归滤波器对所施加的梯度信号进行数字化和滤波，

7. 发明授权

US5545995A Measurement of geometric distortion in MRI images 失效
标题翻译： MRI图像几何畸变的测量
公开(公告)号：US5545995A
公开(公告)日：1996-08-13
申请号：US346599
申请日：1994-11-29
申请人： Erika Schneider , Anton M. Linz , Gregory A. Repinski
发明人： Erika Schneider , Anton M. Linz , Gregory A. Repinski
IPC分类号： G01R33/565 , G01R33/20
CPC分类号： G01R33/56563 , G01R33/56518
摘要： A calibration procedure for correcting geometric errors in MRI images due to gradient field non-linearities and magnetic field inhomogeneities includes performing a 3D scan on a calibration phantom. The calibration phantom contains an array of tapered rods that produce an array of spots in reconstructed slice images. Spot sizes and positions enable position errors to be measured throughout the bore of the imaging system. Corrective coefficients are produced from these 3D error measurements that enable subsequent patient images to be corrected for warping errors in object position.
摘要翻译：用于校正由于梯度场非线性和磁场不均匀性引起的MRI图像中的几何误差的校准过程包括在校准体模上执行3D扫描。校准模型包含一系列锥形棒，其在重建的切片图像中产生点阵列。斑点尺寸和位置使得能够在成像系统的整个孔内测量位置误差。通过这些3D误差测量产生校正系数，使得随后的患者图像能够在物体位置纠正错误。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式