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41. 发明授权

US06418336B1 MR tomography apparatus and method for suppressing stimulation of an examination subject 有权
标题翻译： MR断层摄影装置和抑制检查对象刺激的方法
公开(公告)号：US06418336B1
公开(公告)日：2002-07-09
申请号：US09632789
申请日：2000-08-04
申请人： Ralph Kimmlingen , Franz Schmitt
发明人： Ralph Kimmlingen , Franz Schmitt
IPC分类号： A61B5055
CPC分类号： G01R33/3852
摘要： In an MR tomography system and a method for operating an MR tomography system for the purpose of executing both fast and conventional measuring sequences with high image resolution without triggering stimulations in a living subject and with a high degree of freedom in the selection of imaging regions, a gradient coil is provided with at least two independently controllable potions, so that it is possible to set up gradient fields for a first imaging subregion and for a second imaging subregion that is not a subset of the first region and does not contain it, as well as an aggregate imaging region that contains at least the first and second imaging regions. The gradient fields for different regions can be set up in chronological succession, the various possibilities for setting up the gradient fields allows a selection dependent on the set measuring sequences to be determined prior to the execution of data acquisition with an examination subject present, so that stimulations do not occur in the actual execution of measuring sequences for image data acquisition.
摘要翻译：在MR断层摄影系统和用于操作MR断层摄影系统的方法中，为了执行具有高图像分辨率的快速和常规测量序列，而不在活体中触发刺激，并且在成像区域的选择中具有高自由度，梯度线圈设置有至少两个可独立控制的药水，使得可以为第一成像子区域和不是第一区域的子集而不包含第一成像子区域的第二成像子区域设置梯度场，如以及至少包含第一和第二成像区域的聚集成像区域。可以按时间顺序设置不同区域的梯度场，用于设置梯度场的各种可能性允许在使用检查对象存在的数据采集执行之前确定依赖于所设置的测量序列的选择，使得在图像数据采集的测量序列的实际执行中不会发生刺激。

42. 发明授权

US6157280A Switchable gradient coil arrangement 有权
标题翻译：可切换梯度线圈布置
公开(公告)号：US6157280A
公开(公告)日：2000-12-05
申请号：US436519
申请日：1999-11-09
申请人： Winfried Arz , Lothar Regenfus , Franz Schmitt
发明人： Winfried Arz , Lothar Regenfus , Franz Schmitt
IPC分类号： G01R33/385 , H01F5/00
CPC分类号： G01R33/385
摘要： A switchable gradient coil arrangement for a magnetic resonance tomography apparatus, has conductor ends in the primary plane (or planes) that can be differently connected to one another and/or to conductor ends in the secondary plane (or planes) to form respective coil arrangements having different field qualities/performance features. The connections are produced by a switch system composed of standard switches for the logical interconnection of the individual sub-coils, in the form of at least four bipolar switches. One of these switches, as a power connection switch connects the ends of each sub-coil to the power terminals, one switch is connected parallel to the sub-coil, and at least one switch is arranged in a connection branch that branches for optional connection to other sub-coils.
摘要翻译：用于磁共振断层摄影装置的可切换梯度线圈装置具有在主平面（或平面）中的导体端，其可以在二次平面（或平面）中彼此不同地连接和/或导体端，以形成相应的线圈装置具有不同的场质量/性能特征。连接由至少四个双极开关形式的由各个子线圈的逻辑互连的标准开关组成的开关系统产生。这些开关中的一个作为电源连接开关将每个子线圈的端部连接到电源端子，一个开关并联到子线圈，并且至少一个开关布置在连接分支中，用于可选连接到其他子线圈。

43. 发明授权

US5814990A Method for compensating DC voltage ofsets in measurement channels for nuclear magnetic resonance signals and arrangement for the implementation of the method 失效
标题翻译：用于补偿用于核磁共振信号的测量通道中的直流电压的方法以及用于实施该方法的装置
公开(公告)号：US5814990A
公开(公告)日：1998-09-29
申请号：US847718
申请日：1997-04-28
申请人： Piotr Wielopolski , Franz Schmitt
发明人： Piotr Wielopolski , Franz Schmitt
IPC分类号： G01R33/54 , A61B5/055 , G01R33/565
CPC分类号： G01R33/565 , G01R33/5659
摘要： In a nuclear magnetic resonance tomography apparatus wherein image information are sampled in time measurement windows with a sampling grid that is not equidistant in time and are digitized, for D.C. offset compensation in at least one measurement window, the output signal of the measurement channel is sampled without a nuclear magnetic resonance signal, is digitized, and the offset data acquired in this way are stored in an offset vector. The n offset data stored in the offset vector are subtracted from the image raw data that are acquired per measurement window and allocated chronologically in the sampling grid.
摘要翻译：在其中图像信息在时间测量窗口中采样的核磁共振断层摄影装置中，采样网格在时间上不等距并被数字化，用于至少一个测量窗口中的直流偏移补偿，测量通道的输出信号被采样没有核磁共振信号被数字化，并且以这种方式获取的偏移数据被存储在偏移矢量中。从每个测量窗口获取的图像原始数据中减去存储在偏移矢量中的n个偏移数据，并按时间顺序在采样网格中分配。

44. 发明授权

US5278506A Method and circuit for operating a magnetic resonance imaging apparatus for producing tomograms in an arbitrary position 失效
标题翻译：用于操作用于在任意位置产生断层图像的磁共振成像装置的方法和电路
公开(公告)号：US5278506A
公开(公告)日：1994-01-11
申请号：US842999
申请日：1992-02-28
申请人： Franz Schmitt
发明人： Franz Schmitt
IPC分类号： G01R33/385 , G01R33/54 , G01R33/20
CPC分类号： G01R33/385 , G01R33/4833
摘要： A method and circuit for operating a magnetic resonance imaging apparatus to produce tomograms in an arbitrary position (plane) generate logic gradients which are arbitrarily spatially oriented by a combination of a number of physical magnetic field gradients. At least one gradient coil is operated in a resonant circuit. The logic gradients do not chronologically overlap. A logic read-out gradient can have gaps (non-signal regions) in the region of its zero-axis crossings, at which time a logic phase-coding gradient can be activated.
摘要翻译：用于操作磁共振成像装置以在任意位置（平面）上产生断层图的方法和电路产生通过多个物理磁场梯度的组合任意空间取向的逻辑梯度。至少一个梯形线圈在谐振电路中工作。逻辑梯度不按时间顺序重叠。逻辑读出梯度在其零轴交叉的区域中可以具有间隙（非信号区域），此时可激活逻辑相位编码梯度。

45. 发明授权

US10345399B2 Method and local coil system for producing a magnetic resonance radio frequency field 有权
公开(公告)号：US10345399B2
公开(公告)日：2019-07-09
申请号：US14245181
申请日：2014-04-04
申请人： Hans-Peter Fautz , Wolfgang Renz , Franz Schmitt
发明人： Hans-Peter Fautz , Wolfgang Renz , Franz Schmitt
IPC分类号： G01R33/28 , G01R33/34 , G01R33/36 , G01R33/3415
摘要： A magnetic resonance RF field is produced in a magnetic resonance imaging system that includes a main magnetic field apparatus and an object-bearing table movable relative to the main magnetic field apparatus and on which a local coil system is arranged. The local coil system includes a plurality of transmission elements. A current location of the object-bearing table relative to the main magnetic field apparatus is established. The transmission elements are automatically connected based on the current location of the object-bearing table.

46. 发明授权

US09176209B2 Controlling gradient coils taking the inductive coupling into account 有权
标题翻译：考虑电感耦合的控制梯度线圈
公开(公告)号：US09176209B2
公开(公告)日：2015-11-03
申请号：US13552442
申请日：2012-07-18
申请人： Eva Eberlein , Ralph Kimmlingen , Helmut Lenz , Franz Schmitt
发明人： Eva Eberlein , Ralph Kimmlingen , Helmut Lenz , Franz Schmitt
IPC分类号： G01R33/54 , G01R33/385
CPC分类号： G01R33/543 , G01R33/385 , G01R33/3852
摘要： A gradient pulse generator generates reference current signals for a plurality of gradient coils of a gradient coil system of a magnetic resonance system and supplies each of the reference current signals to a controller assigned to one of the gradient coils. Also supplied to the respective controller is an actual current signal that is characteristic of the current flowing in the respective gradient coil. Each of the controllers generates a control signal and accordingly drives a gradient power amplifier assigned to the respective gradient coil. The gradient power amplifiers apply a current to the gradient coils assigned to the gradient power amplifiers in accordance with the generated control signals. Each of the controllers is also supplied with the reference current signal or the actual current signal of at least one other gradient coil or the time derivative of the reference current signal or the actual current signal.
摘要翻译：梯度脉冲发生器产生用于磁共振系统的梯度线圈系统的多个梯度线圈的参考电流信号，并将每个参考电流信号提供给分配给一个梯度线圈的控制器。还提供给相应控制器的是实际电流信号，其是在各个梯度线圈中流动的电流的特征。每个控制器产生控制信号，并相应地驱动分配给相应梯度线圈的梯度功率放大器。梯度功率放大器根据所生成的控制信号向分配给梯度功率放大器的梯度线圈施加电流。每个控制器还提供参考电流信号或至少一个其他梯度线圈的实际电流信号或参考电流信号或实际电流信号的时间导数。

47. 发明申请

US20130187653A1 ACTIVATION OF FIELD COILS OF A MAGNETIC RESONANCE SYSTEM HAVING EDDY CURRENT COMPENSATION 有权
标题翻译：具有EDDY电流补偿的磁共振系统的现场线圈的激活
公开(公告)号：US20130187653A1
公开(公告)日：2013-07-25
申请号：US13554870
申请日：2012-07-20
申请人： Eva Eberlein , Ralph Kimmlingen , Franz Schmitt , Johann Schuster
发明人： Eva Eberlein , Ralph Kimmlingen , Franz Schmitt , Johann Schuster
IPC分类号： G01R33/54
CPC分类号： G01R33/543 , G01R33/389
摘要： A controller of a magnetic resonance system determines an activation signal vector based on a target field predetermined for the controller in conjunction with field characteristics of field coils known to the controller. The activation signal vector includes a respective activation signal for each field coil. The controller determines the activation signal vector such that within a predetermined examination volume of the magnetic resonance system, any deviation of an ideal field that would result if ideal coils were subjected to the activation signals of the activation signal vector from the target field is minimized. The controller determines a compensation signal vector based on the activation signal vector in conjunction with eddy current characteristics of the field coils known to the controller. The compensation signal vector is used to minimize a deviation of an actual field from the target field within the predetermined examination volume of the magnetic resonance system.
摘要翻译：磁共振系统的控制器结合控制器已知的场线圈的场特性，基于为控制器预定的目标场确定激活信号矢量。激活信号向量包括用于每个励磁线圈的相应启动信号。控制器确定激活信号向量，使得在磁共振系统的预定检查体积内，如果理想线圈受到来自目标场的激活信号矢量的激活信号的任何理想场的偏差都将最小化。控制器基于激活信号向量结合控制器已知的励磁线圈的涡流特性来确定补偿信号向量。补偿信号矢量被用于最小化在磁共振系统的预定检查体积内的实际场与目标场的偏差。

48. 发明授权

US07902822B2 Method for adjustment of a B1 field of a magnetic resonance apparatus 有权
标题翻译：用于调整磁共振装置的B1场的方法
公开(公告)号：US07902822B2
公开(公告)日：2011-03-08
申请号：US12051127
申请日：2008-03-19
申请人： Joerg Ulrich Fontius , Franz Schmitt , Karsten Wicklow
发明人： Joerg Ulrich Fontius , Franz Schmitt , Karsten Wicklow
IPC分类号： G01V3/00
CPC分类号： G01R33/583 , G01R33/288 , G01R33/36 , G01R33/5608 , G01R33/5612 , G01R33/5659
摘要： In a method for adjustment of a B1 field in a magnetic resonance apparatus, the position of the measurement subject relative to a coordinate system is determined from a plurality of measurement subjects with a morphological magnetic resonance measurement. Respective tissue types of the measurement subject are determined using three-dimensional measurement subject data and a segmentation of the measurement subject into regions is effected using the tissue types having known dielectric properties. The segmentation and the association for all positions of the measurement subject are recorded for all subjects in respective entries of a database. A radio-frequency simulation for transmission coils is implemented with the entries of the database wherein electrical field distributions and/or B1 field distributions related to spatial elements are determined and are entered as results into the database, that is then used further magnetic resonance examinations.
摘要翻译：在用于调整磁共振装置中的B1场的方法中，从具有形态磁共振测量的多个测量对象确定测量对象相对于坐标系的位置。使用三维测量对象数据确定测量对象的各种组织类型，并且使用具有已知介电特性的组织类型将测量对象分割成区域。为数据库的各个条目中的所有科目记录测量对象的所有位置的分割和关联。用数据库条目实现传输线圈的射频仿真，其中确定与空间元素相关的电场分布和/或B1场分布，并作为结果输入到数据库中，然后使用进一步的磁共振检查。

49. 发明授权

US07548061B2 Method and magnetic resonance apparatus for setting a shim to homogenize a magnetic field in the apparatus 失效
标题翻译：用于设置垫片以均匀化装置中的磁场的方法和磁共振装置
公开(公告)号：US07548061B2
公开(公告)日：2009-06-16
申请号：US12037200
申请日：2008-02-26
申请人： Andrew Dewdney , Franz Schmitt
发明人： Andrew Dewdney , Franz Schmitt
IPC分类号： G01V3/00
CPC分类号： G01R33/3875 , G01R33/483
摘要： In a method for determination or adaptation of a shim for homogenization of a magnetic field of a magnetic resonance apparatus, which magnetic field is provided for the generation of magnetic resonance exposures of a specific examination region, an automatic determination, of a computer and/or supported by an operator on an image output unit of the computer, is made of a three-dimensional volume that is relevant for the determination or adaptation of the shim and that is matched to the examination region and/or an examination protocol by selection from an arbitrary morphology set of selectable volumes (which morphology set is not limited to specific shapes) and/or by generation of an arbitrarily three-dimensional volume not limited to specific shapes. The computer then automatically calculates the shim for the determined or selected three-dimensional volume.
摘要翻译：在用于确定或适应用于磁共振装置的磁场的均匀化的垫片的方法中，该磁场被提供用于产生特定检查区域的磁共振暴露，计算机的自动确定和/或由计算机的图像输出单元上的操作者支持的三维体积由与所述垫片的确定或适应相关并且与检查区域和/或检查协议相匹配的三维体积通过从可选容积的任意形态集（该形态集不限于特定形状）和/或通过生成不限于特定形状的任意三维体积。然后，计算机自动计算确定或选择的三维体积的垫片。

50. 发明授权

US07439742B2 Magnetic resonance RF transmission array 有权
公开(公告)号：US07439742B2
公开(公告)日：2008-10-21
申请号：US11605780
申请日：2006-11-28
申请人： Ulrich Fontius , Rudi Baumgartl , Franz Schmitt , Georg Pirkl , Bernd Stoeckel
发明人： Ulrich Fontius , Rudi Baumgartl , Franz Schmitt , Georg Pirkl , Bernd Stoeckel
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/36 , G01R33/3607 , G01R33/5612
摘要： In a magnetic resonance system and an operating method therefor, a number of independently operable radio frequency signal generator modules are provided or respectively connected to radio frequency coils. A control unit provides a synchronization signal to each of the radio frequency signal generator modules to selectively operate the modules to achieve different types of signal transmission. One of the radio frequency signal generator modules can serve as a master module, that receives the synchronization signal directly from the control unit, and supplies the synchronization signal to the other modules, functioning as slave modules.

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