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    Method for monitoring an RF power amplifier, and an RF device, a monitoring device, and an MR system corresponding thereto
    1.
    发明授权
    Method for monitoring an RF power amplifier, and an RF device, a monitoring device, and an MR system corresponding thereto 有权
    用于监视RF功率放大器的方法，以及RF装置，监视装置和与其对应的MR系统

    公开(公告)号：US07474877B2

    公开(公告)日：2009-01-06

    申请号：US11055049

    申请日：2005-02-10

    申请人： Wolfgang Bielmeier ,  Klaus Ludwig

    发明人： Wolfgang Bielmeier ,  Klaus Ludwig

    IPC分类号： H04B1/04 ,  H04B17/00

    CPC分类号： H03G3/3042 ,  G01R33/288 ,  G01R33/3614 ,  H03G3/3047

    摘要： In a method for monitoring a radio-frequency power amplifier, and a radio-frequency device, and a radio-frequency monitoring device and a magnetic resonance tomography system, radio-frequency pulses are emitted at temporal intervals by the radio-frequency power amplifier, and measurement values that represent the power of the radio-frequency pulses are measured at temporal intervals. The measurement values are respectively loaded with a measurement error. Control values are respectively formed based on the sum of a number of measurement values loaded with measurement errors, and the radio-frequency power amplifier is limited in operation if and when a control value reaches or exceeds a predetermined limit control value.

    摘要翻译： 在射频功率放大器和射频装置以及射频监视装置和磁共振断层摄影系统的监视方法中，射频功率放大器以时间间隔发射射频脉冲， 并且以时间间隔测量表示射频脉冲功率的测量值。 测量值分别加载测量误差。 控制值分别基于加载有测量误差的测量值的总和形成，并且如果控制值达到或超过预定极限控制值，则射频功率放大器在操作中受到限制。

    Method for monitoring an RF power amplifier, and an RF device, a monitoring device, and an MR system corresponding thereto
    2.
    发明申请
    Method for monitoring an RF power amplifier, and an RF device, a monitoring device, and an MR system corresponding thereto 有权
    用于监视RF功率放大器的方法，以及RF装置，监视装置和与其对应的MR系统

    公开(公告)号：US20050197077A1

    公开(公告)日：2005-09-08

    申请号：US11055754

    申请日：2005-02-10

    申请人： Wolfgang Bielmeier ,  Klaus Ludwig

    发明人： Wolfgang Bielmeier ,  Klaus Ludwig

    IPC分类号： G01R33/28 ,  G01R33/36 ,  H03G3/30 ,  H04B17/00 ,  H03C1/62 ,  H04B1/04

    CPC分类号： H03G3/3042 ,  G01R33/288 ,  G01R33/3614 ,  G01R33/543 ,  H03G3/3047

    摘要： In a method for monitoring of a radio frequency power amplifier and a radio frequency device, a radio frequency monitoring device and magnetic resonance tomography system operable according to the method, radio frequency pulses emitted by a radio frequency power amplifier and are transmitted into a human subject by a transmission coil at temporal intervals. Measurement values that represent the power of the radio frequency pulses are measured at temporal intervals, and varying, predetermined power limit values are determined at temporal intervals. A control value representing the radio frequency dose emitted in a time window is determined based on a number of measurement values measured in the time window. Likewise, a limit control value representing a dose limit value allowed in the appertaining time window is determined based on the power limit values determined in the appertaining time window. The radio frequency power amplifier is limited in operation if and when the control value reaches or exceeds the limit control value.

    摘要翻译： 在一种用于监视射频功率放大器和射频装置的方法中，可以根据该方法操作的射频监视装置和磁共振断层摄影系统，由射频功率放大器发射的射频脉冲被发送到人类对象 通过传输线圈以时间间隔。 以时间间隔测量表示射频脉冲功率的测量值，并且以时间间隔确定变化的预定功率极限值。 基于在时间窗中测量的测量值的数量来确定代表在时间窗中发射的射频剂量的控制值。 同样，基于在适当时间窗口中确定的功率极限值来确定表示在所述时间窗口中允许的剂量限制值的限制控制值。 射频功率放大器在控制值达到或超过限制控制值时受到限制。

    Method for controlling an RF transmission device, and MR apparatus and RF device for implementing the method
    3.
    发明授权
    Method for controlling an RF transmission device, and MR apparatus and RF device for implementing the method 有权
    用于控制RF传输设备的方法，以及用于实现该方法的MR设备和RF设备

    公开(公告)号：US07187172B2

    公开(公告)日：2007-03-06

    申请号：US11358481

    申请日：2006-02-21

    申请人： Wolfgang Bielmeier ,  Klaus Ludwig ,  Volker Schnetter

    发明人： Wolfgang Bielmeier ,  Klaus Ludwig ,  Volker Schnetter

    IPC分类号： G01V3/00

    CPC分类号： G01R33/56375 ,  G01R33/28 ,  G01R33/56383

    摘要： In a method for controlling a radio-frequency device, and a magnetic resonance tomography system and a radio-frequency control device wherein the method is implemented, the RF device of a magnetic resonance tomography system is emitted during a magnetic resonance measurement of an examination subject that is moving relative to the transmission field of the RF device. The RF device emits RF pulses at chronological intervals, and measurement values are measured at chronological intervals. At chronological intervals, position values are determined that represent a current position of the examination subject relative to the transmission field. On the basis of the measurement values and the position values, exposure values are determined that represent a physiological degree of effectiveness that the RF pulses have on the subject exposed to the RF pulses. Based on a multiplicity of exposure values, exposure control values are respectively formed. The RF device is limited in its functioning if an exposure control value reaches or exceeds an exposure limit value.

    摘要翻译： 在用于控制射频装置的方法中，以及磁共振断层摄影系统和其中实施该方法的射频控制装置中，在检查对象的磁共振测量期间发射磁共振断层摄影系统的RF装置 相对于RF设备的传输场移动。 RF器件按时间间隔发射RF脉冲，测量值按时间顺序测量。 按照时间间隔，确定表示检查对象相对于传播场的当前位置的位置值。 基于测量值和位置值，确定表示RF脉冲对受试者暴露于RF脉冲的生理学效度的曝光值。 基于多个曝光值，分别形成曝光控制值。 如果曝光控制值达到或超过曝光极限值，RF设备的功能受到限制。

    Method, device and magnetic resonance tomography system for monitoring emitted RF energy
    4.
    发明授权
    Method, device and magnetic resonance tomography system for monitoring emitted RF energy 有权
    用于监测发射RF能量的方法，装置和磁共振断层摄影系统

    公开(公告)号：US07342398B2

    公开(公告)日：2008-03-11

    申请号：US11197008

    申请日：2005-08-04

    申请人： Wolfgang Bielmeier ,  Klaus Ludwig

    发明人： Wolfgang Bielmeier ,  Klaus Ludwig

    IPC分类号： G01V3/00

    CPC分类号： G01R33/288 ,  G01R33/3607 ,  G01R33/543

    摘要： In a method, device and magnetic resonance tomography system for monitoring a radio-frequency apparatus in which radio-frequency pulses are emitted at temporal intervals and in which measurement values representing the power of the radio-frequency pulses are measured at temporal intervals, the measurement values are used to determine exposure values that represent a physiological effect that the radio-frequency pulses have on a subject exposed to the radio-frequency pulses. Based on a number of exposure values, exposure-monitoring values are respectively formed and the radio-frequency apparatus is limited in function if an exposure-monitoring value reaches or exceeds an exposure limit value.

    摘要翻译： 在一种用于监视以时间间隔发射射频脉冲的射频装置的装置和磁共振断层摄影系统，其中以时间间隔测量表示射频脉冲功率的测量值，测量 值用于确定表示射频脉冲对受试者暴露于射频脉冲的生理影响的曝光值。 基于多个曝光值，分别形成曝光监视值，并且如果曝光监视值达到或超过曝光极限值，则射频装置的功能受到限制。

    Method, device and magnetic resonance tomography system for monitoring emitted RF energy
    5.
    发明申请
    Method, device and magnetic resonance tomography system for monitoring emitted RF energy 有权
    用于监测发射RF能量的方法，装置和磁共振断层摄影系统

    公开(公告)号：US20070024283A1

    公开(公告)日：2007-02-01

    申请号：US11197008

    申请日：2005-08-04

    申请人： Wolfgang Bielmeier ,  Klaus Ludwig

    发明人： Wolfgang Bielmeier ,  Klaus Ludwig

    IPC分类号： G01V3/00

    CPC分类号： G01R33/288 ,  G01R33/3607 ,  G01R33/543

    摘要： In a method, device and magnetic resonance tomography system for monitoring a radio-frequency apparatus in which radio-frequency pulses are emitted at temporal intervals and in which measurement values representing the power of the radio-frequency pulses are measured at temporal intervals, the measurement values are used to determine exposure values that represent a physiological effect that the radio-frequency pulses have on a subject exposed to the radio-frequency pulses. Based on a number of exposure values, exposure-monitoring values are respectively formed and the radio-frequency apparatus is limited in function if an exposure-monitoring value reaches or exceeds an exposure limit value.

    摘要翻译： 在一种用于监视以时间间隔发射射频脉冲的射频装置的装置和磁共振断层摄影系统，其中以时间间隔测量表示射频脉冲功率的测量值，测量 值用于确定表示射频脉冲对受试者暴露于射频脉冲的生理影响的曝光值。 基于多个曝光值，分别形成曝光监视值，并且如果曝光监视值达到或超过曝光极限值，则射频装置的功能受到限制。