公开(公告)号：US06714011B1

公开(公告)日：2004-03-30

申请号：US09596215

申请日：2000-06-19

申请人： Bernd Aldefeld ,  Johannes Adrianus Overweg

发明人： Bernd Aldefeld ,  Johannes Adrianus Overweg

IPC分类号： G01V300

CPC分类号： G01R33/482 ,  G01R33/4838

摘要： The invention relates to an MR method wherein disturbing MR signals from peripheral regions outside the isocenter are suppressed in that a location-dependent, brief, steady magnetic field is produced simultaneously with an RF pulse. When the field strength of the magnetic field in the peripheral regions is either larger or smaller than that at the isocenter, it can be achieved that exclusively the nuclear magnetization in the peripheral regions is excited, which magnetization can subsequently be dephased. The subsequent MR sequence then influences only the region around the isocenter.

摘要翻译： 本发明涉及一种MR方法，其中抑制了来自等角点之外的外围区域的MR信号，因为与RF脉冲同时产生位置相关的简短的稳定磁场。 当外围区域的磁场的场强大于或小于等角点处的磁场强度时，可以实现仅外围区域的核磁化被激发，随后磁化可以被去相位。 随后的MR序列仅影响等角点周围的区域。

公开(公告)号：US06618606B2

公开(公告)日：2003-09-09

申请号：US09962654

申请日：2001-09-25

申请人： Johannes Adrianus Overweg ,  Bernd Aldefeld

发明人： Johannes Adrianus Overweg ,  Bernd Aldefeld

IPC分类号： A61B5055

CPC分类号： G01R33/3806 ,  G01R33/3815

摘要： A vertical field type MRI apparatus is provided with a superconducting coil system for generating a substantially homogeneous magnetic field in an imaging volume of the apparatus. The coil system includes a circular outer coil and a supplementary coil which is positioned in the same plane as and within the outer coil, which coils conduct opposite currents. The ratio Da/Do of the diameter Da of the supplementary coil to the diameter Do of the outer coil lies between 0.7 and 0.9. Further coils for making the field more homogeneous are preferably located on a conical surface within the circular outer coil and supplementary coil in such a manner that a recess is formed in which a conically shaped gradient coil system can be accommodated, with the result that the expensive outer coil and the supplementary coil can be arranged at an as short as possible distance from the space for receiving the patient to be examined.

摘要翻译： 垂直场型MRI装置设置有超导​​线圈系统，用于在装置的成像体积中产生基本均匀的磁场。 线圈系统包括圆形的外部线圈和辅助线圈，该线圈与外部线圈位于同一平面内，该线圈导致相反的电流。 辅助线圈的直径Da与外部线圈的直径Do的比Da / Do在0.7和0.9之间。 用于使场更均匀的更多线圈优选地位于圆形外线圈和辅助线圈内的锥形表面上，使得形成凹槽，其中可容纳锥形梯度线圈系统，结果是昂贵的 外线圈和辅助线圈可以布置在与用于接收待检查患者的空间尽可能短的距离处。

公开(公告)号：US20090177076A1

公开(公告)日：2009-07-09

申请号：US12296936

申请日：2007-04-05

申请人： Bernd Aldefeld ,  Peter Boernert ,  Jochen Keupp ,  Johan Samuel Van Den Brink

发明人： Bernd Aldefeld ,  Peter Boernert ,  Jochen Keupp ,  Johan Samuel Van Den Brink

IPC分类号： A61B5/05

CPC分类号： G01R33/56375 ,  G01R33/56383 ,  G01R33/56509 ,  G01R33/5673 ,  G01R33/5676

摘要： A magnetic resonance examination system has an object carrier (14) to move an object to be examined relative to the field of view. A monitoring system (33) monitors examination circumstances under which magnetic resonance signals are acquired from the object within the field of view. In particular the monitoring system monitors the degree of physiological motion in the patient to be examined. A velocity control system (32) to control the velocity of the movement of the object relative to the field of view and to control the velocity on the basis of the monitored examination circumstances, i.e. the degree of physiological motion.

摘要翻译： 磁共振检查系统具有用于相对于视场移动待检查物体的物体载体（14）。 监视系统（33）监视从视野内的物体获取磁共振信号的检查情况。 特别地，监测系统监测待检查患者的生理运动程度。 一种速度控制系统（32），用于控制物体相对于视场的移动速度，并且基于所监视的检查情况即生理运动的程度来控制速度。

公开(公告)号：US06587707B2

公开(公告)日：2003-07-01

申请号：US09880197

申请日：2001-06-13

申请人： Kay Nehrke ,  Peter Boernert ,  Bernd Aldefeld ,  Michael Harald Kuhn ,  Dirk Manke

发明人： Kay Nehrke ,  Peter Boernert ,  Bernd Aldefeld ,  Michael Harald Kuhn ,  Dirk Manke

IPC分类号： A61B5055

CPC分类号： G01R33/5676

摘要： An MR imaging method wherein motion of an object to be imaged is examined during a preparation phase preceding the actual MR examination. The necessary sequences for the subsequent MR examination are modified during the examination to compensate for the motion based on motion parameters calculated during the preparation phase or motion parameters derived from the motion parameters calculated during the preparation phase based on a correlation between the motion parameters.

摘要翻译： 一种MR成像方法，其中在实际MR检查之前的准备阶段检查待成像对象的运动。 在检查期间修改用于后续MR检查的必要序列，以基于在准备阶段期间计算的运动参数或基于运动参数之间的相关性在准备阶段期间计算的运动参数导出的运动参数来补偿运动。

公开(公告)号：US20090033327A1

公开(公告)日：2009-02-05

申请号：US11911723

申请日：2006-04-07

申请人： Bernd Aldefeld ,  Peter Boernert ,  Jochen Keupp

发明人： Bernd Aldefeld ,  Peter Boernert ,  Jochen Keupp

IPC分类号： G01R33/563

CPC分类号： G01R33/56375

摘要： A continuous moving table magnetic resonance imaging method is proposed where a ‘lateral’ read out is performed that is transverse to the direction of motion. This magnetic resonance imaging method for imaging a moving object includes spatially selective RF excitations are applied for respective phase-encodings. The sub-volume is excited by the spatially selective RF excitation moves with the motion of the object for respective subsets of primary phase-encodings. Acquisition of magnetic resonance signals is performed from a three-dimensional sub-volume of the object. The magnetic resonance signals are read encoded in a direction transverse to the direction of motion of the object and phase-encoded in at least the direction of motion of the object.

摘要翻译： 提出了一种连续移动台磁共振成像方法，其中执行横向于运动方向的“横向”读出。 用于对运动物体成像的这种磁共振成像方法包括空间选择性的RF激励用于各自的相位编码。 子体积被空间选择性RF激发移动与物体的运动激励，以相应的主相位编码子集。 从对象的三维子体积执行磁共振信号的获取。 磁共振信号在横向于物体的运动方向的方向上被读取，并且至少在物体的运动方向上进行相位编码。

公开(公告)号：US20090003674A1

公开(公告)日：2009-01-01

申请号：US11909167

申请日：2006-03-27

申请人： Jochen Keupp ,  Peter Boernert ,  Bernd Aldefeld

发明人： Jochen Keupp ,  Peter Boernert ,  Bernd Aldefeld

IPC分类号： G06K9/54

CPC分类号： G01R33/56375 ,  G01R33/5611

摘要： During continuous moving of an imaging subject (12) through a scanner field of view (20), k-space data are acquired using a plurality of radio frequency coils (24, 26). The acquiring includes undersampling of k-space in at least one undersampled direction. A weighted transform (62) from k-space to real space is defined for at least one undersampled direction. The weighted transform incorporates patient position-dependent coil sensitivity weighting factors and a Fourier transform. The acquired k-space data are hybrid transformed along the direction of continuous moving to define hybrid space data having a real space dimension in the transformed direction of continuous moving and a k-space dimension in a transverse direction that is transverse to the direction of continuous moving. The hybrid space data are transformed along the transverse direction to generate a reconstructed image. The hybrid transforming and the transforming employ the defined weighted transform (62) conditional upon the corresponding direction being undersampled.

摘要翻译： 在成像对象（12）通过扫描仪视野（20）的连续移动期间，使用多个射频线圈（24,26）获取k空间数据。 获取包括至少一个欠采样方向的k空间欠采样。 对于至少一个欠采样方向，定义从k空间到实际空间的加权变换（62）。 加权变换包括患者位置相关的线圈灵敏度加权因子和傅里叶变换。 所获取的k空间数据沿着连续移动的方向被混合变换以限定在连续移动的变换方向上具有实际空间尺寸的混合空间数据和横向于连续方向的横向方向上的k空间尺寸 移动。 混合空间数据沿着横向变换以产生重构图像。 混合变换和变换采用定义的加权变换（62），条件是相应方向被欠采样。

公开(公告)号：US06377043B1

公开(公告)日：2002-04-23

申请号：US09355491

申请日：1999-07-28

申请人： Bernd Aldefeld ,  Hermann Schomberg ,  Dietrich Holz

发明人： Bernd Aldefeld ,  Hermann Schomberg ,  Dietrich Holz

IPC分类号： G01V300

CPC分类号： G01R33/3852

摘要： The invention enables the temporal variation of the magnetic field generated by a gradient coil to be derived from the measured temporal variation of the current through this gradient coil and from a pulse response which has been determined once and stored for the relevant coil. In this case an inexpensive non-linear amplifier may be used in the gradient channel, and also a gradient coil with eddy current effects, without the reconstruction or the pulse design being degraded.

摘要翻译： 本发明使得由梯度线圈产生的磁场的时间变化可以从测量的通过该梯度线圈的电流的时间变化和已经为相关线圈确定一次并被存储的脉冲响应导出。 在这种情况下，可以在梯度通道中使用廉价的非线性放大器，也可以使用具有涡流效应的梯度线圈，而不会使重构或脉冲设计劣化。

公开(公告)号：US07436178B2

公开(公告)日：2008-10-14

申请号：US10595805

申请日：2004-11-03

申请人： Jochen Keupp ,  Bernd Aldefeld ,  Peter Boernert

发明人： Jochen Keupp ,  Bernd Aldefeld ,  Peter Boernert

IPC分类号： G01V3/00

CPC分类号： G01R33/56375 ,  G01R33/5611 ,  G01R33/563

摘要： A plurality of global receive coils (24a, 24b, 24c) are stationarily positioned around a fixed field of view (FOV) of a magnetic resonance diagnostic imaging device (10). Each global receive coil receives undersampled phase and frequency encoded data from the stationary field of view. A subject is imaged as it moves continuously through the fixed field of view such that data is collected over a virtual field of view (vFOV) of the subject which is longer than the field of view in a longitudinal direction of subject motion. Centrally encoded k-space data, acquired from each of the global receive coils, is used to generate coil sensitivity patterns (42) which are mapped (44) from the stationary field of view to the virtual field of view. A SENSE reconstruction processor (54) performs a SENSE reconstruction on the virtual field of view data in which reconstructed data is combined and unfolded in accordance with the virtual field of view sensitivity patterns (48) to generate a virtual field of view image representation (60).

摘要翻译： 多个全局接收线圈（24a，24b，24c）被固定地围绕磁共振诊断成像装置（10）的固定视野（FOV）定位。 每个全局接收线圈从静止视场接收欠采样的相位和频率编码数据。 当被摄体连续移动通过固定视野时，对象被成像，使得数据在被摄体的虚拟视野（vFOV）上被收集，所述虚拟视场（vFOV）在主体运动的纵向方向上比视场长。 从每个全局接收线圈获取的集中编码的k空间数据用于产生从静止视场映射到虚拟视场的线圈灵敏度模式（42）。 SENSE重建处理器（54）在虚拟视野数据上执行SENSE重建，其中根据虚拟视场灵敏度模式（48）组合和展开重构数据，以生成虚拟视野图像表示（60 ）。

公开(公告)号：US20070145977A1

公开(公告)日：2007-06-28

申请号：US10595805

申请日：2004-11-03

申请人： Jochen Keupp ,  Bernd Aldefeld ,  Peter Boernert

发明人： Jochen Keupp ,  Bernd Aldefeld ,  Peter Boernert

IPC分类号： G01V3/00

CPC分类号： G01R33/56375 ,  G01R33/5611 ,  G01R33/563

摘要： A plurality of global receive coils (24a, 24b, 24c) are stationarily positioned around a fixed field of view (FOV) of a magnetic resonance diagnostic imaging device (10). Each global receive coil receives undersampled phase and frequency encoded data from the stationary field of view. A subject is imaged as it moves continuously through the fixed field of view such that data is collected over a virtual field of view (vFOV) of the subject which is longer than the field of view in a longitudinal direction of subject motion. Centrally encoded k-space data, acquired from each of the global receive coils, is used to generate coil sensitivity patterns (42) which are mapped (44) from the stationary field of view to the virtual field of view. A SENSE reconstruction processor (54) performs a SENSE reconstruction on the virtual field of view data in which reconstructed data is combined and unfolded in accordance with the virtual field of view sensitivity patterns (48) to generate a virtual field of view image representation (60).

摘要翻译： 多个全局接收线圈（24a，24b，24c）被固定地围绕磁共振诊断成像装置（10）的固定视野（FOV）定位。 每个全局接收线圈从静止视场接收欠采样的相位和频率编码数据。 当被摄体连续移动通过固定视野时，对象被成像，使得数据在被摄体的虚拟视野（vFOV）上被收集，所述虚拟视场（vFOV）在主体运动的纵向方向上比视场长。 从每个全局接收线圈获取的集中编码的k空间数据用于产生从静止视场映射到虚拟视场的线圈灵敏度模式（42）。 SENSE重建处理器（54）在虚拟视野数据上执行SENSE重建，其中根据虚拟视场灵敏度模式（48）组合和展开重构数据，以生成虚拟视野图像表示（60 ）。

公开(公告)号：US06813512B2

公开(公告)日：2004-11-02

申请号：US09976328

申请日：2001-10-12

申请人： Bernd Aldefeld ,  Friedrich-Karl Beckmann ,  Holger Eggers ,  Rolf Udo Dieter Kobs ,  Erhard Paul Artur Klotz ,  Michael Harald Kuhn ,  Dirk Manke ,  Volker Rasche ,  Georg Weidinger

发明人： Bernd Aldefeld ,  Friedrich-Karl Beckmann ,  Holger Eggers ,  Rolf Udo Dieter Kobs ,  Erhard Paul Artur Klotz ,  Michael Harald Kuhn ,  Dirk Manke ,  Volker Rasche ,  Georg Weidinger

IPC分类号： A61B500

CPC分类号： A61B5/065 ,  A61B5/055 ,  A61B5/06 ,  A61B34/20 ,  A61B90/361 ,  A61B90/37 ,  A61B2017/00243 ,  A61B2034/2051 ,  A61B2034/2063 ,  A61B2090/374 ,  A61B2090/3782 ,  A61B2090/3958

摘要： A device for determining the position of a medical instrument that is introduced into an object to be examined is also used for imaging the vicinity of the medical instrument. In order to enable the acquisition of instantaneous position information and image information from the vicinity of the medical instrument for all kinds of medical instruments, a localization device that is arranged in the end zone of the medical instrument that is to be introduced determines the position of the medical instrument within the object to be examined; at the same time image information is acquired in the vicinity of the medical instrument by an image acquisition device that is arranged on the medical instrument and on the basis of the position thus determined the position of the medical instrument (3) is reproduced in a survey image of the object to be examined and images of the vicinity of the object to be examined are displayed on the basis of the image information acquired.

摘要翻译： 用于确定被引入待检查物体的医疗器具的位置的装置也用于对医疗器械附近进行成像。 为了能够从用于各种医疗器械的医疗器械附近获取瞬时位置信息和图像信息，布置在待引入的医疗器械的端部区域中的定位装置决定了 待检对象内的医疗器械; 同时通过布置在医疗器械上的图像获取装置在医疗器械附近获取图像信息，并且基于如此确定的位置，在调查中再现医疗器械（3）的位置 基于所获取的图像信息，显示要被检查的对象的图像和被检查对象的附近的图像。