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公开(公告)号：US20080231274A1
公开(公告)日：2008-09-25
申请号：US12051923
申请日：2008-03-20
IPC分类号： G01R33/483
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。
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2.发明授权Method to control a magnetic resonance system with individually controllable RF transmission channels 有权用单独控制的RF传输通道控制磁共振系统的方法公开(公告)号：US07719281B2
公开(公告)日：2010-05-18
申请号：US12051923
申请日：2008-03-20
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。
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3.发明授权Method and device for monitoring radio-frequency exposure in a magnetic resonance measurement 有权用于监测磁共振测量中射频暴露的方法和装置公开(公告)号：US07622921B2
公开(公告)日：2009-11-24
申请号：US11965809
申请日：2007-12-28
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。
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4.发明申请METHOD AND DEVICE FOR MONITORING RADIO-FREQUENCY EXPOSURE IN A MAGNETIC RESONANCE MEASUREMENT 有权用于监测磁共振测量中的无线电频率接触的方法和装置公开(公告)号：US20080157765A1
公开(公告)日：2008-07-03
申请号：US11965809
申请日：2007-12-28
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。
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公开(公告)号：US07902822B2
公开(公告)日：2011-03-08
申请号：US12051127
申请日：2008-03-19
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。
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公开(公告)号：US20080231270A1
公开(公告)日：2008-09-25
申请号：US12051127
申请日：2008-03-19
IPC分类号： G01R33/48
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. Three-dimensionally associable measurement subject data are determined from the measurement subject. Respective tissue types of the measurement subject are determined using the three-dimensional measurement subject data and a segmentation of the measurement subject into regions is effected using the tissue types. Known dielectric properties are respectively associated with the tissue types. The segmentation and the association for all positions of the measurement subject are recorded in respective entries of a database, such that the database contains all entries of the measurement subjects. A radio-frequency simulation for an transmission coils is implemented with the entries of the database, with which electrical field distributions and/or B1 field distributions related to spatial elements are determined as a simulation result and are entered as results into the database. For further magnetic resonance examinations, the entries of the database are used for determination of an optimized current distribution for elements of a transmission coil with which the B1 field is ultimately adjusted.
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。 从测量对象确定三维可关联的测量对象数据。 使用三维测量对象数据确定测量对象的各种组织类型，并且使用组织类型对测量对象进入区域进行分割。 已知的介电性质分别与组织类型相关。 将测量对象的所有位置的分割和关联记录在数据库的相应条目中，使得数据库包含测量对象的所有条目。 用数据库的条目实现传输线圈的射频仿真，将与空间元素相关的电场分布和/或B1场分布确定为模拟结果并作为结果输入到数据库中。 对于进一步的磁共振检查，数据库的条目用于确定最终调整B1场的传输线圈元件的优化电流分布。
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公开(公告)号：US20140307764A1
公开(公告)日：2014-10-16
申请号：US14251595
申请日：2014-04-12
IPC分类号： H04B17/00
CPC分类号： H04B17/12 , G01R33/3607 , G01R33/5612 , G01R33/586
摘要： A method for operating a transmission device of a magnetic resonance device is provided. In order to actuate coil elements of a radiofrequency coil with different phases, phase differences in a reference plane are taken into consideration. In a first calibration measurement to be performed once for each transmission path, a first phase of a transmitted radiofrequency signal is measured by an internal measuring device installed permanently in the transmission device spaced apart from the reference plane. A second phase of the transmitted radiofrequency signal is measured by a second, external measuring device to be connected to the reference plane for the first calibration measurement. At least one phase of the first phase and the second phase is taken into consideration in the phase-accurate actuating of the coil elements and/or for correcting further measurements with the internal measuring device.
摘要翻译： 提供了一种用于操作磁共振装置的传输装置的方法。 为了激励具有不同相位的射频线圈的线圈元件，考虑到参考平面中的相位差。 在对于每个传输路径执行一次的第一校准测量中，通过永久安装在与参考平面间隔开的传输设备中的内部测量设备测量发射的射频信号的第一相位。 发射的射频信号的第二阶段由第二外部测量装置测量，以连接到用于第一校准测量的参考平面。 在线圈元件的相位精确致动中和/或用于利用内部测量装置校正进一步的测量时，考虑到第一相和第二相的至少一相。
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8.发明授权Input system for orientation in a three-dimensional visualization and method for visualization of three-dimensional data sets 失效用于三维可视化中的取向的输入系统和用于可视化三维数据集的方法公开(公告)号：US07567701B2
公开(公告)日：2009-07-28
申请号：US10727467
申请日：2003-12-04
申请人： Joerg Ulrich Fontius
发明人： Joerg Ulrich Fontius
IPC分类号： G06K9/00
CPC分类号： G06F3/04815 , G06F3/0346 , G06F3/03543 , G06F2203/0334 , G06T15/08 , G06T19/00 , G06T2210/41
摘要： In a display system to display a visualization of three-dimensional data sets on a monitor, by means of values input with the aid of an input system, a three-dimensional representation is manipulated, whereby the manipulation is limited to a portion of the visualization.
摘要翻译： 在显示系统中，通过借助于输入系统输入的值来显示监视器上的三维数据集的可视化，操纵三维表示，由此将操作限于一部分可视化 。
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公开(公告)号：US10135549B2
公开(公告)日：2018-11-20
申请号：US14251595
申请日：2014-04-12
IPC分类号： H04B17/00 , G01R33/36 , H04B17/12 , G01R33/561 , G01R33/58
摘要： A method for operating a transmission device of a magnetic resonance device is provided. In order to actuate coil elements of a radiofrequency coil with different phases, phase differences in a reference plane are taken into consideration. In a first calibration measurement to be performed once for each transmission path, a first phase of a transmitted radiofrequency signal is measured by an internal measuring device installed permanently in the transmission device spaced apart from the reference plane. A second phase of the transmitted radiofrequency signal is measured by a second, external measuring device to be connected to the reference plane for the first calibration measurement. At least one phase of the first phase and the second phase is taken into consideration in the phase-accurate actuating of the coil elements and/or for correcting further measurements with the internal measuring device.
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10.发明申请COMBINED MAGNETIC RESONANCE IMAGING AND TARGETING DEVICE FOR MAGNETIC PARTICLES 有权用于磁性颗粒的组合磁共振成像和瞄准装置公开(公告)号：US20100079142A1
公开(公告)日：2010-04-01
申请号：US12568935
申请日：2009-09-29
申请人： Joerg Ulrich Fontius
发明人： Joerg Ulrich Fontius
CPC分类号： A61B5/055 , A61B5/4839 , A61B34/73 , A61B2090/374 , A61N2/002 , G01R33/4808
摘要： The invention relates to a combined magnetic resonance imaging and targeting device for magnetic particles having a magnetic coil array. The magnetic coil array comprises a plurality of coils, each of which is connected to a power supply. The power supplies are connected to a controller which is embodied for two operating modes. In a first operating mode the power supplies are controlled in such a way that a magnetic field extreme value is generated at at least one location in a target region. In a second operating mode the power supplies are controlled in such a way that magnetic fields having a strictly monotonously rising or falling magnetic field profile are generated in an imaging region.
摘要翻译： 本发明涉及一种用于具有磁线圈阵列的磁性颗粒的组合磁共振成像和瞄准装置。 磁线圈阵列包括多个线圈，每个线圈连接到电源。 电源连接到具有两种操作模式的控制器。 在第一操作模式中，电源被控制成使得在目标区域中的至少一个位置处产生磁场极值。 在第二操作模式中，电源被控制成使得在成像区域中产生具有严格单调上升或下降的磁场分布的磁场。
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