公开(公告)号：US20050088177A1

公开(公告)日：2005-04-28

申请号：US10691405

申请日：2003-10-22

申请人： Oliver Schreck ,  Mike Muller ,  Martin Harder ,  Hans-Peter Hollenbach ,  Franz Schmitt ,  Ines Nimsky ,  Anders Dale ,  Andre Van Der Kouwe

发明人： Oliver Schreck ,  Mike Muller ,  Martin Harder ,  Hans-Peter Hollenbach ,  Franz Schmitt ,  Ines Nimsky ,  Anders Dale ,  Andre Van Der Kouwe

IPC分类号： A61B5/05 ,  A61B5/055 ,  A61B5/107 ,  A61B6/00 ,  A61B6/03 ,  G01V3/00

CPC分类号： A61B5/055 ,  A61B6/03 ,  A61B6/506

摘要： In a method and computer program product for operating a tomographic imaging apparatus, a standard measurement protocol is generated by displaying a planning representation of a standard object, defining a spatial position of a standard imaging area in the planning representation, and storing, as the standard measurement protocol for the standard object, a reference to the standard object and parameters of the standard imaging area. Such a standard measurement protocol can then be used in the slice position planning for an actual tomographic measurement, by obtaining data representing features of an examination object, corresponding to the standard object, determining a geometrical relation of the features of the examination object to features of the standard object, and generating an object-specific measurement protocol wherein the imaging area is positioned relative to the examination object by modification of the standard measurement protocol.

公开(公告)号：US06952097B2

公开(公告)日：2005-10-04

申请号：US10691405

申请日：2003-10-22

申请人： Oliver Schreck ,  Mike Müller ,  Martin Harder ,  Hans-Peter Hollenbach ,  Franz Schmitt ,  Ines Nimsky ,  Anders Dale ,  Andre Van Der Kouwe

发明人： Oliver Schreck ,  Mike Müller ,  Martin Harder ,  Hans-Peter Hollenbach ,  Franz Schmitt ,  Ines Nimsky ,  Anders Dale ,  Andre Van Der Kouwe

IPC分类号： A61B5/05 ,  A61B5/055 ,  A61B5/107 ,  A61B6/00 ,  A61B6/03 ,  G01V3/00

CPC分类号： A61B5/055 ,  A61B6/03 ,  A61B6/506

摘要： In a method and computer program product for operating a tomographic imaging apparatus, a standard measurement protocol is generated by displaying a planning representation of a standard object, defining a spatial position of a standard imaging area in the planning representation, and storing, as the standard measurement protocol for the standard object, a reference to the standard object and parameters of the standard imaging area. Such a standard measurement protocol can then be used in the slice position planning for an actual tomographic measurement, by obtaining data representing features of an examination object, corresponding to the standard object, determining a geometrical relation of the features of the examination object to features of the standard object, and generating an object-specific measurement protocol wherein the imaging area is positioned relative to the examination object by modification of the standard measurement protocol.

摘要翻译： 在用于操作层析成像设备的方法和计算机程序产品中，通过在规划表示中显示标准对象的规划表示，定义标准成像区域的空间位置并存储作为标准来生成标准测量协议 标准对象的测量协议，参考标准对象和标准成像区域的参数。 这样的标准测量协议然后可以用于实际断层摄影测量的切片位置规划，通过获得表示与标准对象相对应的检查对象的特征的数据，确定检查对象的特征的几何关系， 标准对象，并且生成对象特定测量协议，其中通过修改标准测量协议，成像区域相对于检查对象定位。

公开(公告)号：US20140306708A1

公开(公告)日：2014-10-16

申请号：US14250140

申请日：2014-04-10

申请人： Hans-Peter Fautz ,  Matthias Gebhardt ,  Franz Schmitt

发明人： Hans-Peter Fautz ,  Matthias Gebhardt ,  Franz Schmitt

IPC分类号： G01R33/36

CPC分类号： G01R33/36 ,  G01R33/288 ,  G01R33/34092

摘要： A magnetic resonance apparatus including transmission antennas that may be actuated in parallel by a control device of the magnetic resonance apparatus may be operated in a group mode. In the group mode, the transmission antennas are grouped into groups of transmission antennas. The actuation signals of transmission antennas within the respective group are in a respectively predefined relationship relative to one another. A respective group actuation signal for each of the groups of transmission antennas is prescribed for the control device by an operator. The control device carries out checks as to whether a group exposure value established based on the group actuation signals lies below a maximum admissible group exposure limit. If this is the case, the control device establishes the actuation signals for the individual transmission antennas based on the group actuation signals. If this is not the case, the control device carries out another measure.

摘要翻译： 包括可由磁共振装置的控制装置并行致动的发送天线的磁共振装置可以以组模式操作。 在组模式中，发送天线被分组成发送天线组。 相应组内的发射天线的致动信号相对于彼此分别是预定义的关系。 用于操作者的控制装置规定了用于发送天线组中的每一组的相应组致动信号。 控制装置执行基于组致动信号建立的组曝光值是否在最大允许组暴露极限以下的检查。 如果是这种情况，则控制装置基于组致动信号建立各个发送天线的致动信号。 如果不是这样，则控制装置执行另一个测量。

公开(公告)号：US08000770B2

公开(公告)日：2011-08-16

申请号：US11777334

申请日：2007-07-13

申请人： Franz Schmitt

发明人： Franz Schmitt

IPC分类号： A61B5/055

CPC分类号： A61B5/0555 ,  G01R33/288 ,  G01R33/307

摘要： A magnetic resonance device has a patient bed able to be automatically moved by means of a drive apparatus into a patient chamber, as well as a magnet arrangement for creating a magnetic field in the interior of the patient chamber. The drive apparatus is operated so as to move the patient bed at a speed determined as a function of the distribution of the magnetic field in the direction of movement of the patient bed.

摘要翻译： 磁共振装置具有能够通过驱动装置自动移动到病人室中的患者床，以及用于在患者室的内部产生磁场的磁体装置。 驱动装置被操作以便以病人床的移动方向上的磁场分布确定的速度移动患者床。

公开(公告)号：US07719281B2

公开(公告)日：2010-05-18

申请号：US12051923

申请日：2008-03-20

申请人： Joerg Ulrich Fontius ,  Marian Lattka ,  Juergen Nistler ,  Franz Schmitt

发明人： Joerg Ulrich Fontius ,  Marian Lattka ,  Juergen Nistler ,  Franz Schmitt

IPC分类号： G01V3/00

CPC分类号： G01R33/36 ,  G01R33/34046 ,  G01R33/3415 ,  G01R33/3607 ,  G01R33/5612 ,  G01R33/5659

摘要： In a method for controlling a magnetic resonance system having a radio-frequency antenna structure and a number of individually controllable transmission channels, respective parallel radio-frequency signals are emitted via the transmission channels for generation of a desired radio-frequency field distribution in at least one specific volume region within an examination volume of the magnetic resonance system. A digital signal is generated for each of the transmission channels and is modulated on a carrier frequency. The radio-frequency signal so generated is transmitted via a radio-frequency signal path to the radio-frequency antenna structure and is amplified therein in a radio-frequency power amplifier. The digital signal is manipulated in a characteristic curve correction device on the basis of a correction characteristic curve predetermined for the respective radio-frequency signal path such that a distortion of the radio-frequency signal caused in the appertaining radio-frequency signal path is at least partially compensated. Respective individual correction characteristic curves for a specific measurement are predetermined for the various transmission channels dependent on a field distribution parameter that defines the desired radio-frequency field distribution. A magnetic resonance system implements such a method.

摘要翻译： 在一种用于控制具有射频天线结构和多个可独立控制的传输信道的磁共振系统的方法中，经由传输信道发射各自的并行射频信号，用于至少产生所需的射频场分布 在磁共振系统的检查体积内的一个比体积区域。 为每个传输信道生成数字信号，并在载波频率上进行调制。 如此生成的射频信号经由射频信号路径发送到射频天线结构，并且在射频功率放大器中被放大。 基于针对各个射频信号路径预定的校正特性曲线，在特性曲线校正装置中操作数字信号，使得在相应射频信号路径中引起的射频信号的失真至少为 部分补偿。 根据限定期望的射频场分布的场分布参数，针对各种传输信道预先确定特定测量的各自的校正特性曲线。 磁共振系统实现这种方法。

公开(公告)号：US07622921B2

公开(公告)日：2009-11-24

申请号：US11965809

申请日：2007-12-28

申请人： Joerg Ulrich Fontius ,  Juergen Nistler ,  Wolfgang Renz ,  Franz Schmitt ,  Karsten Wicklow

发明人： Joerg Ulrich Fontius ,  Juergen Nistler ,  Wolfgang Renz ,  Franz Schmitt ,  Karsten Wicklow

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/288 ,  G01R33/5612

摘要： In a method and device for monitoring the physiologically effective radio-frequency exposure in at least one specific volume region of an examination subject in a magnetic resonance data acquisition scan in a magnetic resonance system, amplitude values are acquired that respectively represent, at specific acquisition points in time, a signal amplitude of the radio-frequency signals emitted or to be emitted via the radio-frequency signal channels. Also, phase values are acquired that represent the phases of the appertaining radio-frequency signals at these points in time. Local exposure values are then determined on the basis of the amplitude values and phase values, respectively representing a physiological exposure that the radio-frequency pulses cause at the examination subject at a specific location at a specific time. Based on this, exposure control values are determined that are compared with predetermined exposure limit values. When an exposure limit values is reached or exceeded, a control signal is output.

摘要翻译： 在用于在磁共振系统的磁共振数据采集扫描中监测检查对象的至少一个特定体积区域中的生理上有效的射频暴露的方法和装置中，获取分别表示在特定采集点 在时间上，经由射频信号信道发射或将要发射的射频信号的信号幅度。 此外，获取代表在这些时间点处的无线电频率信号的相位的相位值。 然后根据振幅值和相位值来确定本地曝光值，分别表示在特定时间在特定位置处的检查对象发生的射频脉冲引起的生理暴露。 基于此，确定与预定曝光极限值进行比较的曝光控制值。 当达到或超过曝光限制值时，输出控制信号。

公开(公告)号：US20080157765A1

公开(公告)日：2008-07-03

申请号：US11965809

申请日：2007-12-28

申请人： Joerg Ulrich Fontius ,  Juergen Nistler ,  Wolfgang Renz ,  Franz Schmitt ,  Karsten Wicklow

发明人： Joerg Ulrich Fontius ,  Juergen Nistler ,  Wolfgang Renz ,  Franz Schmitt ,  Karsten Wicklow

IPC分类号： G01R33/483

CPC分类号： G01R33/3415 ,  G01R33/288 ,  G01R33/5612

摘要： In a method and device for monitoring the physiologically effective radio-frequency exposure in at least one specific volume region of an examination subject in a magnetic resonance data acquisition scan in a magnetic resonance system, the magnetic resonance system having a radio-frequency antenna structure with a number of individually controllable radio-frequency signal channels for generation of radio-frequency field distributions in an examination volume including the examination subject, amplitude values are acquired that respectively represent, at specific acquisition points in time, a signal amplitude of the radio-frequency signals emitted or to be emitted via the radio-frequency signal channels in the course of the magnetic resonance measurement. Also, phase values are acquired that represent the phases of the appertaining radio-frequency signals at these points in time. Local exposure values are then determined on the basis of the amplitude values and phase values, these local exposure values respectively representing a physiological exposure that the radio-frequency pulses cause at the examination subject at a specific location at a specific time. Based on this, exposure control values are determined that are compared with predetermined exposure limit values. When an exposure limit values is reached or exceeded, a control signal is output.

摘要翻译： 在用于在磁共振系统的磁共振数据采集扫描中监测检查对象的至少一个特定体积区域中的生理上有效的射频暴露的方法和装置中，所述磁共振系统具有射频天线结构， 在包括检查对象的检查体积中产生用于产生射频场分布的多个独立控制的射频信号通道，获取分别在特定采集时间点表示射频信号幅度的振幅值 在磁共振测量过程中通过射频信号通道发射或发射的信号。 此外，获取代表在这些时间点处的无线电频率信号的相位的相位值。 然后基于振幅值和相位值来确定局部曝光值，这些局部曝光值分别表示在特定时间的特定位置的射频脉冲在检查对象下引起的生理暴露。 基于此，确定与预定曝光极限值进行比较的曝光控制值。 当达到或超过曝光限制值时，输出控制信号。

公开(公告)号：US06208140B1

公开(公告)日：2001-03-27

申请号：US09414553

申请日：1999-10-08

申请人： Matthias Gebhardt ,  Franz Schmitt

发明人： Matthias Gebhardt ,  Franz Schmitt

IPC分类号： G01V300

CPC分类号： G01R33/385 ,  G01R33/3852

摘要： In a method for operating a MR-tomography device, and MR-tomography device, the gradient coil system can be switched to different field qualities during a pulse sequence, so that an optimized field quality can be chosen during the individual measuring phases of a pulse sequence.

摘要翻译： 在用于操作MR断层摄影装置和MR断层摄影装置的方法中，梯度线圈系统可以在脉冲序列期间切换到不同的场质量，使得可以在脉冲的各个测量阶段期间选​​择优化的场质量 序列。

公开(公告)号：US6123658A

公开(公告)日：2000-09-26

申请号：US313559

申请日：1999-05-14

申请人： Peter Schweighofer ,  Michael Moritz ,  Franz Schmitt

发明人： Peter Schweighofer ,  Michael Moritz ,  Franz Schmitt

IPC分类号： A61N2/00 ,  A61N2/02 ,  A61N2/04 ,  A61N1/00

CPC分类号： A61N2/02 ,  A61N2/006

摘要： A magnetic stimulation device has at least one stimulation coil, which is connected with its terminals to the output of at least one controllable electronic power converter and which has an inductance and current and voltage carrying capability, so that the stimulation pulses it generates permeate at least one volume on the order of magnitude of limbs, head or trunk of a patient. The controllable electronic power converter contains at least one activatable and deactivatable power semiconductor switch with short switching times. The electronic power converter is connected with its input to a voltage intermediate circuit. The voltage intermediate circuit and the controllable electronic power converter have a layout for high output voltages and currents, so that action potentials can be triggered even in deeper neuromuscular tissue of a patient, and the magnetic stimulation device offers wide freedom in the selection of the stimulation pulse shapes.

摘要翻译： 磁刺激装置具有至少一个刺激线圈，其与其端子连接至至少一个可控电子功率转换器的输出，并且具有电感和电流和电压承载能力，使得其产生的刺激脉冲至少渗透至少 一个病人肢体，头部或躯干的数量级。 可控电子功率转换器包含至少一个具有短切换时间的可激活和可去激活的功率半导体开关。 电子功率转换器与其输入端连接到电压中间电路。 电压中间电路和可控电子功率转换器具有用于高输出电压和电流的布局，使得即使在患者的较深的神经肌肉组织中也可以触发动作电位，并且磁刺激装置在刺激的选择中提供广泛的自由度 脉冲形状。

公开(公告)号：US5298863A

公开(公告)日：1994-03-29

申请号：US621040

申请日：1990-12-03

申请人： Stefan Nowak ,  Franz Schmitt ,  Hubertus Fischer

发明人： Stefan Nowak ,  Franz Schmitt ,  Hubertus Fischer

IPC分类号： G01R33/385 ,  G01R33/20

CPC分类号： G01R33/3852

摘要： A gradient coil for generating a periodically changing read-out gradient in a magnetic resonance imaging apparatus is operated in a series resonant circuit having a capacitor. One of the elements of the series resonant circuit is charged before the beginning of each read-out gradient. The gradient coil can be charged with current, or the capacitor can be charged with voltage. Such operation either avoids or significantly shortens the transient effect which occurs after excitation of the nuclear spins. The use of a series resonant circuit instead of a parallel resonant circuit significantly reduces the voltage load on the gradient amplifier, so that the gradient amplifier can be constructed simpler and more inexpensively.

摘要翻译： 在具有电容器的串联谐振电路中操作用于在磁共振成像装置中产生周期性变化的读出梯度的梯度线圈。 在每个读出梯度的开始之前，串联谐振电路的元件之一被充电。 梯度线圈可以充电电流，或者电容器可以充电电压。 这种操作可以避免或显着缩短在核自旋激发后发生的瞬态效应。 使用串联谐振电路代替并联谐振电路可以显着降低梯度放大器的电压负载，从而使梯度放大器的构造更简单，成本更低。