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1. 发明申请

US20130241553A1 METHOD OF CHARACTERIZING 有权
标题翻译：表征方法
公开(公告)号：US20130241553A1
公开(公告)日：2013-09-19
申请号：US13882293
申请日：2011-10-26
申请人： Johan Van Den Brink , Ingmar Graesslin , Sascha Krueger , Steffen Weiss , Peter Vernickel
发明人： Johan Van Den Brink , Ingmar Graesslin , Sascha Krueger , Steffen Weiss , Peter Vernickel
IPC分类号： G01R33/36 , G01R33/44
CPC分类号： G01R33/36 , G01R33/246 , G01R33/44 , G01R33/5612 , G01R33/583
摘要： The invention relates to a method of characterizing the RF transmit chain of a magnetic resonance imaging scanner (1) using a local transmit/receive coil system (204; 210), comprising a first local NMR probe and a first local magnetic resonance coil, the first NMR probe being spatially located in immediate neighborhood to the first coil, a local receive coil system (206; 208), comprising a second local NMR probe and a second local magnetic resonance coil, the second NMR probe being spatially located in immediate neighborhood to the second coil, wherein the transmit chain comprises an external MR coil (9; 11; 12; 13), the method comprising: determining with the first magnetic resonance coil, a first MR signal phase evolution of the local RF transmit field generated by MR excitation of the first probe using the first magnetic resonance coil by measuring the RF response of the first probe upon said excitation, determining with the second magnetic resonance coil a second MR signal phase evolution of the local RF transmit field generated by MR excitation of the second probe using the external MR coil (9; 11; 12; 13) by measuring the RF response of the second probe upon said excitation, calculating a phase offset between the first and second MR signal phase evolution.
摘要翻译：本发明涉及一种使用本地发射/接收线圈系统（204; 210）来表征磁共振成像扫描仪（1）的RF发射链的方法，该系统包括第一局部NMR探针和第一局部磁共振线圈，空间上位于第一线圈周围的第一NMR探针，包括第二局部NMR探针和第二局部磁共振线圈的局部接收线圈系统（206; 208），所述第二NMR探针在空间上位于紧邻附近所述第二线圈，其中所述发射链包括外部MR线圈（9; 11; 12; 13），所述方法包括：利用所述第一磁共振线圈确定由MR产生的所述本地RF发射场的第一MR信号相位演变通过在所述激发时测量第一探针的RF响应，使用第一磁共振线圈激发第一探针，用第二磁共振线圈确定第二MR信号相位ev 使用外部MR线圈（9; 9）对第二探针的MR激发产生的局部RF发射场的清零。 11; 12; 13）通过在所述激励时测量第二探针的RF响应，计算第一和第二MR信号相位演变之间的相位偏移。

2. 发明授权

US09575146B2 Method of characterizing 有权
标题翻译：表征方法
公开(公告)号：US09575146B2
公开(公告)日：2017-02-21
申请号：US13882293
申请日：2011-10-26
申请人： Johan Van Den Brink , Ingmar Graesslin , Sascha Krueger , Steffen Weiss , Peter Vernickel
发明人： Johan Van Den Brink , Ingmar Graesslin , Sascha Krueger , Steffen Weiss , Peter Vernickel
IPC分类号： G01R33/36 , G01R33/24 , G01R33/44 , G01R33/561 , G01R33/58
CPC分类号： G01R33/36 , G01R33/246 , G01R33/44 , G01R33/5612 , G01R33/583
摘要： The invention relates to a method of characterizing the RF transmit chain of a magnetic resonance imaging scanner (1) using a local transmit/receive coil system (204; 210), comprising a first local NMR probe and a first local magnetic resonance coil, the first NMR probe being spatially located in immediate neighborhood to the first coil, a local receive coil system (206; 208), comprising a second local NMR probe and a second local magnetic resonance coil, the second NMR probe being spatially located in immediate neighborhood to the second coil, wherein the transmit chain comprises an external MR coil (9; 11; 12; 13), the method comprising: determining with the first magnetic resonance coil, a first MR signal phase evolution of the local RF transmit field generated by MR excitation of the first probe using the first magnetic resonance coil by measuring the RF response of the first probe upon said excitation, determining with the second magnetic resonance coil a second MR signal phase evolution of the local RF transmit field generated by MR excitation of the second probe using the external MR coil (9; 11; 12; 13) by measuring the RF response of the second probe upon said excitation, calculating a phase offset between the first and second MR signal phase evolution.
摘要翻译：本发明涉及一种使用本地发射/接收线圈系统（204; 210）来表征磁共振成像扫描仪（1）的RF发射链的方法，该系统包括第一局部NMR探针和第一局部磁共振线圈，空间上位于第一线圈周围的第一NMR探针，包括第二局部NMR探针和第二局部磁共振线圈的局部接收线圈系统（206; 208），所述第二NMR探针在空间上位于紧邻附近所述第二线圈，其中所述发射链包括外部MR线圈（9; 11; 12; 13），所述方法包括：利用所述第一磁共振线圈确定由MR产生的所述本地RF发射场的第一MR信号相位演变通过在所述激发时测量第一探针的RF响应，使用第一磁共振线圈激发第一探针，用第二磁共振线圈确定第二MR信号相位ev 使用外部MR线圈（9; 9）对第二探针的MR激发产生的局部RF发射场的清零。 11; 12; 13）通过在所述激励时测量第二探针的RF响应，计算第一和第二MR信号相位演变之间的相位偏移。

3. 发明申请

US20080211501A1 Method and Curcuit Arrangement For Operating Multi-Channel Transmit/Receive Antenna Devices 有权
标题翻译：用于操作多通道发射/接收天线设备的方法和电路布置
公开(公告)号：US20080211501A1
公开(公告)日：2008-09-04
申请号：US11912683
申请日：2006-04-21
申请人： Ingmar Graesslin , Peter Vernickel , Joachim Schmidt , Christian Findeklee
发明人： Ingmar Graesslin , Peter Vernickel , Joachim Schmidt , Christian Findeklee
IPC分类号： G01R33/3415 , G01R33/48
CPC分类号： G01R33/5612 , G01R33/246 , G01R33/3415 , G01R33/58 , G01R33/583
摘要： Methods and circuit arrangements for operating multi-channel transmit/receive antenna devices or arrangements especially for use in magnetic resonance imaging (MRI) systems are disclosed, by which a fully independent control of complete multi-channel RF transmit and receive chains can be conducted in a flexible way and new options like RF shimming, transmit sensitivity encoding (TransmitSENSE), RF encoding, determination of S- or Z-matrix prior to spin echo measurements, calibration, SAR (specific absorption rate) reduction etc. can be utilized or improved.
摘要翻译：公开了用于操作多通道发射/接收天线装置或特别用于磁共振成像（MRI）系统的装置的方法和电路装置，通过该装置可完全独立地控制完整的多通道RF发射和接收链，可以利用或改进灵活的方式和新的选项，如RF匀场，发射灵敏度编码（TransmitSENSE），RF编码，自旋回波测量之前的S或Z矩阵的确定，校准，SAR（比吸收率）降低等）。

4. 发明授权

US07642782B2 Active decoupling of transmitters in MRI 有权
标题翻译： MRI中发射机的主动去耦
公开(公告)号：US07642782B2
公开(公告)日：2010-01-05
申请号：US12091308
申请日：2006-10-03
申请人： Peter Vernickel , Ingmar Graesslin
发明人： Peter Vernickel , Ingmar Graesslin
IPC分类号： G01V3/00
CPC分类号： G01R33/365
摘要： A magnetic resonance imaging system includes a coupling compensation processor (70) for compensating induced magnetic coupling between n individual coil segments (38) of a coil arrangement (36). An adjusted signal determining device (74) determines an adjusted input signal for each of the n individual coil segments of the coil arrangement (36). A transmitting system (54) creates RF pulses in accordance with the determined adjusted input signals and transmits the RF pulses to corresponding coil segments such that the transmitted RF pulses compensate for coupling between the coil segments (38) in the digital domain.
摘要翻译：磁共振成像系统包括用于补偿线圈装置（36）的n个单独线圈段（38）之间的感应磁耦合的耦合补偿处理器（70）。调整信号确定装置（74）确定线圈装置（36）的n个单独线圈段中的每一个的经调整的输入信号。发射系统（54）根据确定的调整的输入信号产生RF脉冲，并将RF脉冲发送到相应的线圈段，使得发送的RF脉冲补偿数字域中的线圈段（38）之间的耦合。

5. 发明授权

US08390288B2 Method and RF transmitter arrangement for generating RF fields 有权
标题翻译：用于产生RF场的方法和RF发射器装置
公开(公告)号：US08390288B2
公开(公告)日：2013-03-05
申请号：US12598451
申请日：2008-04-24
申请人： Ingmar Graesslin , Peter Boernert , Peter Vernickel , Ulrich Katscher
发明人： Ingmar Graesslin , Peter Boernert , Peter Vernickel , Ulrich Katscher
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/288 , G01R33/3415 , G01R33/543 , G01R33/5604 , G01R33/5611 , G01R33/5659
摘要： A multi-channel RF transmitter arrangement comprising a plurality of RF transmitter elements like RE antennas, antenna elements, coils or coil elements, for generating an RF field, especially for use in a magnetic resonance imaging system for exciting nuclear magnetic resonances, and a method for generating such an RF field wherein the RF transmitter elements are segmented in a plurality of segments at least along the direction of one or more of the main magnetic field of the MRI system, the z-direction or the longitudinal direction.
摘要翻译：包括多个RF发射器元件的多通道RF发射器装置，如RE天线，天线元件，线圈或线圈元件，用于产生RF场，特别是用于激励核磁共振的磁共振成像系统，以及方法用于产生这样的RF场，其中RF发射器元件至少沿着MRI系统的主磁场，z方向或纵向方向中的一个或多个的方向被分段成多个段。

6. 发明授权

US08099059B2 Method and circuit arrangement for operating multi-channel transmit/recieve antenna devices 有权
标题翻译：用于操作多通道发射/接收天线装置的方法和电路装置
公开(公告)号：US08099059B2
公开(公告)日：2012-01-17
申请号：US11912684
申请日：2006-04-27
申请人： Ingmar Graesslin , Peter Vernickel , Christoph Leussler
发明人： Ingmar Graesslin , Peter Vernickel , Christoph Leussler
IPC分类号： H04B1/38 , G01V3/00
CPC分类号： G01R33/5612 , G01R33/288 , G01R33/3415 , G01R33/3607 , H04B17/23 , H04W52/34 , H04W52/367
摘要： A multi-channel transmit/receive antenna device or arrangement for use in a magnetic resonance imaging (MRI) system includes a power monitoring unit. To ensure that a specific absorption rate of a patient is not exceeded, transmitted power levels and reflected power levels on channels for a plurality of coils and/or coil segments are monitored. Each coil/coil segment is supplied with RF transmit signals with different amplitudes and/or phases and/or waveforms and/or power levels.
摘要翻译：用于磁共振成像（MRI）系统的多通道发射/接收天线装置或装置包括功率监测单元。为了确保不超过患者的特定吸收率，监测用于多个线圈和/或线圈段的通道上的发射功率水平和反射功率水平。每个线圈/线圈段都具有不同幅度和/或相位和/或波形和/或功率电平的RF发射信号。

7. 发明申请

US20080258728A1 Active Decoupling of Transmitters in Mri 有权
标题翻译：发射机在Mri中的主动去耦
公开(公告)号：US20080258728A1
公开(公告)日：2008-10-23
申请号：US12091308
申请日：2006-10-03
申请人： Peter Vernickel , Ingmar Graesslin
发明人： Peter Vernickel , Ingmar Graesslin
IPC分类号： G01R33/36
CPC分类号： G01R33/365
摘要： A magnetic resonance imaging system includes a coupling compensation processor (70) for compensating induced magnetic coupling between n individual coil segments (38) of a coil arrangement (36). An adjusted signal determining device (74) determines an adjusted input signal for each of the n individual coil segments of the coil arrangement (36). A transmitting system (54) creates RF pulses in accordance with the determined adjusted input signals and transmits the RF pulses to corresponding coil segments such that the transmitted RF pulses compensate for coupling between the coil segments (38) in the digital domain.
摘要翻译：磁共振成像系统包括用于补偿线圈装置（36）的n个单独线圈段（38）之间的感应磁耦合的耦合补偿处理器（70）。调整信号确定装置（74）确定线圈装置（36）的n个单独线圈段中的每一个的经调整的输入信号。发射系统（54）根据确定的调整的输入信号产生RF脉冲，并将RF脉冲发送到相应的线圈段，使得发送的RF脉冲补偿数字域中的线圈段（38）之间的耦合。

8. 发明申请

US20100141259A1 METHOD AND RF TRANSMITTER ARRANGEMENT FOR GENERATING RF FIELDS 有权
标题翻译：用于生成射频信号的方法和射频发射机装置
公开(公告)号：US20100141259A1
公开(公告)日：2010-06-10
申请号：US12598451
申请日：2008-04-24
申请人： Ingmar Graesslin , Peter Boernert , Peter Vernickel , Ulrich Katscher
发明人： Ingmar Graesslin , Peter Boernert , Peter Vernickel , Ulrich Katscher
IPC分类号： G01R33/44
CPC分类号： G01R33/34046 , G01R33/288 , G01R33/3415 , G01R33/543 , G01R33/5604 , G01R33/5611 , G01R33/5659
摘要： A multi-channel RF transmitter arrangement comprising a plurality of RF transmitter elements (e) like RF antennas, antenna elements, coils or coil elements, for generating an RF field, especially for use in a magnetic resonance imaging (MRI) system for exciting nuclear magnetic resonances (NMR), and a method for generating such an RF field is disclosed. The RF transmitter elements (e) are segmented in a plurality of segments (s1, s2, s3, . . . ) at least along the direction of the main magnetic field of the MRI system (or the z-direction or the longitudinal direction.
摘要翻译：一种多通道RF发射器装置，包括多个RF发射器元件（e），例如RF天线，天线元件，线圈或线圈元件，用于产生RF场，特别用于激励核的磁共振成像（MRI）系统公开了磁共振（NMR）和产生这种RF场的方法。 RF发射器元件（e）至少沿着MRI系统的主磁场的方向（或z方向或纵向）被分段成多个段（s1，s2，s3，...）。

9. 发明授权

US07615999B2 Method and circuit arrangement for operating multi-channel transmit/receive antenna devices 有权
标题翻译：用于操作多通道发射/接收天线装置的方法和电路装置
公开(公告)号：US07615999B2
公开(公告)日：2009-11-10
申请号：US11912685
申请日：2006-04-24
申请人： Ingmar Graesslin , Peter Vernickel , Christoph Leussler
发明人： Ingmar Graesslin , Peter Vernickel , Christoph Leussler
IPC分类号： G01V3/00
CPC分类号： G01R33/3607 , G01R33/288 , G01R33/5612 , G01R33/5659
摘要： Methods and circuit arrangements for operating a multi-channel transmit/receive antenna device or arrangement, especially for use in a magnetic resonance imaging (MRI) system, are disclosed by which RF amplifiers can be used to their full peak power capability without running the risk that the RF amplifier is damaged due to excessive reflected power at its output. Furthermore by evaluating certain forward and reflected power signals patient safety is achieved with respect to monitoring the limits of the specific absorption rate.
摘要翻译：公开了用于操作多通道发射/接收天线装置或装置的方法和电路装置，特别是用于磁共振成像（MRI）系统中的哪些RF放大器可以被用于其全峰功率能力而不运行风险 RF放大器由于其输出处的反射功率过大而损坏。此外，通过评估某些正向和反射功率信号，在监测比吸收率的限制方面实现了患者的安全性。

10. 发明申请

US20080182524A1 Method And Circuit Arragement For Operating Multi-Channel Transmit/Recieve Antenna Devices 有权
标题翻译：操作多通道发射/接收天线设备的方法和电路管理
公开(公告)号：US20080182524A1
公开(公告)日：2008-07-31
申请号：US11912684
申请日：2006-04-27
申请人： Ingmar Graesslin , Peter Vernickel , Christoph Leussler
发明人： Ingmar Graesslin , Peter Vernickel , Christoph Leussler
IPC分类号： H04B1/38
CPC分类号： G01R33/5612 , G01R33/288 , G01R33/3415 , G01R33/3607 , H04B17/23 , H04W52/34 , H04W52/367
摘要： Methods and circuit arrangements for operating a multi-channel transmit/receive antenna device or arrangement, comprising a power monitoring unit, especially for use in a magnetic resonance imaging (MRI) system are disclosed. These methods and circuit arrangements are especially provided for ensuring that a specific absorption rate of a patient is not exceeded in the case in which antenna devices or arrangements are used which comprise a plurality of coils and/or coil segments which are independently supplied with RF transmit signals with different amplitudes and/or phases and/or waveforms and/or power levels. A maximum power level is set for at least one of the transmit channels. An alarm state is activated if the supplied power level or the reflected power for that channel exceeds the maximum power level. A maximum sum power level is set for a plurality of transmit channels. An alarm state is activated if the supplied sum power level or the reflected sum power level for the plurality of transmit channels exceeds the maximum sum power level.
摘要翻译：公开了用于操作多通道发射/接收天线装置或装置的方法和电路装置，其包括特别用于磁共振成像（MRI）系统的功率监测单元。特别提供了这些方法和电路装置，用于确保在使用天线装置或布置的情况下不超过患者的比吸收率，所述天线装置或布置包括多个线圈和/或线圈段，这些线圈和/或线圈段独立地提供有RF发射具有不同幅度和/或相位和/或波形和/或功率电平的信号。为至少一个发送信道设置最大功率电平。如果提供的功率电平或该通道的反射功率超过最大功率电平，则激活报警状态。为多个发送信道设置最大和功率电平。如果提供的总功率电平或多个发射信道的反射和功率电平超过最大和功率电平，则激活报警状态。

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