公开(公告)号：US09036884B2

公开(公告)日：2015-05-19

申请号：US13393232

申请日：2010-08-05

申请人： Paul R. Harvey ,  Thomas H. Rozijn ,  Gerrit H. Ijperen ,  Willem M. Prins ,  Wilhelmus R. M. Mens ,  Franciscus J. M. Benschop

发明人： Paul R. Harvey ,  Thomas H. Rozijn ,  Gerrit H. Ijperen ,  Willem M. Prins ,  Wilhelmus R. M. Mens ,  Franciscus J. M. Benschop

IPC分类号： G06K9/00 ,  G01R33/565

CPC分类号： G01R33/5659

摘要： A magnetic resonance system includes a magnetic resonance scanner having a multi-channel transmit coil or coil system and a magnetic resonance receive element; and a digital processor configured to perform an imaging process. The image process includes shimming the multi-channel transmit coil or coil system, acquiring a coil sensitivity map for the magnetic resonance receive element using the multi-channel transmit coil or coil system, acquiring a magnetic resonance image using the magnetic resonance receive element and the shimmed multi-channel transmit coil or coil system, and performing an intensity level correction on the acquired magnetic resonance image using the coil sensitivity map to generate a corrected magnetic resonance image.

摘要翻译： 磁共振系统包括具有多通道发射线圈或线圈系统和磁共振接收元件的磁共振扫描器; 以及被配置为执行成像处理的数字处理器。 图像处理包括对多通道发射线圈或线圈系统进行匀场，使用多通道发射线圈或线圈系统获取用于磁共振接收元件的线圈灵敏度图，使用磁共振接收元件获取磁共振图像，并且 并且使用线圈灵敏度图对获取的磁共振图像执行强度电平校正，以产生校正的磁共振图像。

公开(公告)号：US20120163692A1

公开(公告)日：2012-06-28

申请号：US13393232

申请日：2010-08-05

申请人： Paul R. Harvey ,  Thomas H. Rozijn ,  Gerrit H. Ijperen ,  Willem M. Prins ,  Wilhelmus R. M. Mens ,  Franciscus J. M. Benschop

发明人： Paul R. Harvey ,  Thomas H. Rozijn ,  Gerrit H. Ijperen ,  Willem M. Prins ,  Wilhelmus R. M. Mens ,  Franciscus J. M. Benschop

IPC分类号： G06K9/00

CPC分类号： G01R33/5659

摘要： A magnetic resonance system comprises: a magnetic resonance scanner including a multi-channel transmit coil or coil system and a magnetic resonance receive element; and a digital processor configured to perform an imaging process including shimming the multi-channel transmit coil or coil system, acquiring a coil sensitivity map for the magnetic resonance receive element using the multi-channel transmit coil or coil system, acquiring a magnetic resonance image using the magnetic resonance receive element and the shimmed multi-channel transmit coil or coil system, and performing an intensity level correction on the acquired magnetic resonance image using the coil sensitivity map to generate a corrected magnetic resonance image.

摘要翻译： 磁共振系统包括：包括多通道发射线圈或线圈系统和磁共振接收元件的磁共振扫描器; 以及数字处理器，被配置为执行包括对多通道发射线圈或线圈系统进行匀场的成像处理，使用多通道发射线圈或线圈系统获取用于磁共振接收元件的线圈灵敏度图，使用 所述磁共振接收元件和所述散光多通道发射线圈或线圈系统，并且使用所述线圈灵敏度映射对获取的磁共振图像执行强度电平校正，以产生校正的磁共振图像。

公开(公告)号：US20120161766A1

公开(公告)日：2012-06-28

申请号：US13393234

申请日：2010-08-05

申请人： Paul R. Harvey ,  Ronaldus F.J. Holthuizen ,  Willem M. Prins ,  Franciscus J.M. Benschop

发明人： Paul R. Harvey ,  Ronaldus F.J. Holthuizen ,  Willem M. Prins ,  Franciscus J.M. Benschop

IPC分类号： G01R33/48

CPC分类号： G01R33/583 ,  G01R33/5612 ,  G01R33/5659

摘要： A magnetic resonance method comprising: loading a subject into a magnetic resonance scanner; with the subject loaded into the magnetic resonance scanner, acquiring B1 maps (72) for a plurality of radio frequency transmit channels of the magnetic resonance scanner; shimming the plurality of radio frequency transmit channels and setting a radio frequency transmit power for the shimmed plurality of radio frequency transmit channels using the acquired B 1 maps to generate optimized amplitude and phase parameters (98) for the plurality of radio frequency transmit channels; acquiring magnetic resonance imaging data of the subject loaded into the magnetic resonance scanner including exciting magnetic resonance by operating the plurality of radio frequency transmit channels using the optimized amplitude and phase parameters; generating a reconstructed image from the acquired magnetic resonance imaging data; and displaying the reconstructed image.

摘要翻译： 一种磁共振方法，包括：将对象加载到磁共振扫描器中; 将被摄体加载到磁共振扫描器中，获取磁共振扫描器的多个射频发射通道的B1图（72）; 对所述多个射频发射信道进行匀场，并使用所获取的B 1映射设置所述多个无线频率发射信道的射频发射功率，以产生用于所述多个射频发射信道的优化的幅度和相位参数（98）; 使用优化的幅度和相位参数，通过操作多个射频发射信道来获取加载到磁共振扫描仪中的被摄体的磁共振成像数据，其包括激励磁共振; 从所获取的磁共振成像数据生成重建图像; 并显示重建图像。

公开(公告)号：US5068610A

公开(公告)日：1991-11-26

申请号：US358327

申请日：1989-05-26

申请人： Antoon F. Mehlkopf ,  Willem M. Prins

发明人： Antoon F. Mehlkopf ,  Willem M. Prins

IPC分类号： A61B5/055 ,  G01R33/50 ,  G01R33/56

CPC分类号： G01R33/50 ,  G01R33/56

摘要： An MRI method and device for fast determination of the transverse relaxation time constant T2 utilizes the fact that this time constant introduces asymmetry into all magnetic resonance echo signals (::exp(-t/T2) enabling determination of the time constant T2 from the asymmetry of the echo signals. During the determination of a spin density distribution the value of the time constant T2 can be determined for each pixel. After Fourier transformation of the resonance signal, integration of the imaginary terms is performed (in the coordinate direction of the measuring gradient). The quotient of the current integral and the real term of the associated pixel is an accurate measure of the time constant T2 in the relevant pixel.

摘要翻译： 用于快速确定横向弛豫时间常数T2的MRI方法和装置利用这一事实，即该时间常数将不对称性引入所有磁共振回波信号（:: exp（-t / T2），使得能够从不对称性确定时间常数T2 在确定自旋密度分布期间，可以为每个像素确定时间常数T2的值，在谐振信号的傅里叶变换之后，执行虚部的积分（在测量的坐标方向上 梯度），相关像素的当前积分和实数的商是相关像素中时间常数T2的精确测量。

公开(公告)号：US06424152B1

公开(公告)日：2002-07-23

申请号：US09486993

申请日：2000-03-01

申请人： Willem M. Prins ,  Gerardus N. Peeren

发明人： Willem M. Prins ,  Gerardus N. Peeren

IPC分类号： G01V300

CPC分类号： G01R33/565 ,  G01R33/56509

摘要： A magnetic resonance imaging facilitates a pre-compensating phase encoding of spuriously generated magnetizations. The method includes generating a preparatory excitation of spins represented upon an RF-excitation line, applying subsequently a temporary magnetic compensation gradient as represented along a phase-encoding axis, generating subsequently an RF excitation pulse as represented upon the RF-excitation line, applying subsequent to the RF excitation pulse, and before an acquisition interval for receiving magnetic resonance signals, a phase-encoding gradient as represented along the phase-encoding axis. The phase-encoding gradient is substantially the same magnitude as, and opposite in direction relative to, the direction of the temporary magnetic compensation gradient. The last step includes receiving magnetic resonance signals during the acquisition interval as represented along the RF-excitation line.

摘要翻译： 磁共振成像有利于对伪产生的磁化进行预补偿相位编码。 该方法包括产生在RF激励线上表示的自旋的准备激励，随后施加沿着相位编码轴表示的临时磁补偿梯度，随后产生如RF激励线上表示的RF激励脉冲，随后应用 到RF激励脉冲之前和在用于接收磁共振信号的获取间隔之前，沿相位编码轴表示的相位编码梯度。 相位编码梯度与临时磁补偿梯度的方向基本相同，并且相对于临时磁补偿梯度的方向相反。 最后一步包括在沿RF激励线表示的采集间隔期间接收磁共振信号。