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    Magnetic resonance safety monitoring systems and methods
    22.
    发明授权
    Magnetic resonance safety monitoring systems and methods 有权

    公开(公告)号：US09952296B2

    公开(公告)日：2018-04-24

    申请号：US12808404

    申请日：2008-12-22

    申请人： Sascha Krueger ,  Daniel Wirtz ,  Steffen Weiss

    发明人： Sascha Krueger ,  Daniel Wirtz ,  Steffen Weiss

    IPC分类号： A61B5/055 ,  G08B23/00 ,  G01R33/28

    CPC分类号： G01R33/285 ,  G01R33/288

    摘要： A magnetic resonance method comprises applying a radio frequency excitation in an examination region (14), measuring a magnetic resonance signal generated by the applied radio frequency excitation in a subject (16) in the examination region, monitoring a radio frequency parameter during the applying, and evaluating subject safety based on the monitoring. A magnetic resonance safety monitor (40) comprises an analyzer (42, 44, 46, 50) configured to (i) receive a radio frequency signal during magnetic resonance excitation, (ii) extract a radio frequency parameter from the received radio frequency signal, and (iii) evaluate subject safety based on the extracted radio frequency parameter, and a remediation module (54) configured to perform a remediation of the magnetic resonance excitation responsive to the evaluation (iii) indicating a potentially unsafe condition.

    METHOD OF CHARACTERIZING
    23.
    发明申请
    METHOD OF CHARACTERIZING 有权
    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。

    MAGNETIC RESONANCE SAFETY MONITORING SYSTEMS AND METHODS
    24.
    发明申请
    MAGNETIC RESONANCE SAFETY MONITORING SYSTEMS AND METHODS 有权
    磁共振安全监测系统及方法

    公开(公告)号：US20100312091A1

    公开(公告)日：2010-12-09

    申请号：US12808404

    申请日：2008-12-22

    申请人： Sascha Krueger ,  Daniel Wirtz ,  Steffen Weiss

    发明人： Sascha Krueger ,  Daniel Wirtz ,  Steffen Weiss

    IPC分类号： A61B5/055 ,  G08B23/00

    CPC分类号： G01R33/285 ,  G01R33/288

    摘要： A magnetic resonance method comprises applying a radio frequency excitation in an examination region (14), measuring a magnetic resonance signal generated by the applied radio frequency excitation in a subject (16) in the examination region, monitoring a radio frequency parameter during the applying, and evaluating subject safety based on the monitoring. A magnetic resonance safety monitor (40) comprises an analyzer (42, 44, 46, 50) configured to (i) receive a radio frequency signal during magnetic resonance excitation, (ii) extract a radio frequency parameter from the received radio frequency signal, and (iii) evaluate subject safety based on the extracted radio frequency parameter, and a remediation module (54) configured to perform a remediation of the magnetic resonance excitation responsive to the evaluation (iii) indicating a potentially unsafe condition.

    摘要翻译： 磁共振方法包括在检查区域（14）中施加射频激励，测量由所述检查区域中的被检体（16）施加的射频激励产生的磁共振信号，在施加期间监视射频参数， 并根据监测评估受试者的安全性。 磁共振安全监视器（40）包括分析器（42,44,46,50），其被配置为（i）在磁共振激励期间接收射频信号，（ii）从所接收的射频信号中提取射频参数， 以及（iii）基于提取的射频参数来评估对象安全性;以及修复模块（54），其被配置为响应于指示潜在不安全状况的评估（iii）来执行磁共振激励的修复。

    PASSIVE MR VISUALISATION OF INTERVENTIONAL INSTRUMENTS
    26.
    发明申请
    PASSIVE MR VISUALISATION OF INTERVENTIONAL INSTRUMENTS 审中-公开
    传统仪器的被动MR可视化

    公开(公告)号：US20090080750A1

    公开(公告)日：2009-03-26

    申请号：US12297649

    申请日：2007-04-17

    申请人： Sascha Krueger ,  Steffen Weiss ,  Hannes Dahnke ,  Tobias Richard Schaeffter

    发明人： Sascha Krueger ,  Steffen Weiss ,  Hannes Dahnke ,  Tobias Richard Schaeffter

    IPC分类号： G06K9/00

    CPC分类号： G01R33/286

    摘要： The invention relates to a device for magnetic resonance imaging of a body (7), wherein the device (1) is arranged to a) generate a series of MR echo signals (20) by subjecting at least a portion of the body (7) to an MR imaging sequence comprising RF pulses and switched magnetic field gradients, b) acquire the MR echo signals for reconstructing an MR image (21) therefrom, c) calculate a susceptibility gradient map (22) from the MR echo signals or from the MR image (21), the susceptibility gradient map (22) indicating local susceptibility induced magnetic field gradients, d) determine the position of an interventional instrument (16) having paramagnetic or ferromagnetic properties from the susceptibility gradient map (22).

    摘要翻译： 本发明涉及一种用于身体（7）的磁共振成像的装置，其中所述装置（1）被布置成：a）通过对所述主体（7）的至少一部分进行承受来产生一系列MR回波信号（20） 涉及包括RF脉冲和切换磁场梯度的MR成像序列，b）获取用于重构MR图像（21）的MR回波信号，c）从MR回波信号或从MR回波信号计算磁敏度梯度图（22） 图像（21），表示局部敏感性感应磁场梯度的磁敏度梯度图（22），d）从磁敏度梯度图（22）确定具有顺磁性或铁磁性质的介入仪器（16）的位置。

    Method of characterizing
    28.
    发明授权
    Method of characterizing 有权
    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。

    MAGNETIC RESONANCE GUIDANCE OF A SHAFT TO A TARGET ZONE
    29.
    发明申请
    MAGNETIC RESONANCE GUIDANCE OF A SHAFT TO A TARGET ZONE 有权
    对目标区域的磁共振指导

    公开(公告)号：US20140018664A1

    公开(公告)日：2014-01-16

    申请号：US14007990

    申请日：2012-04-04

    申请人： Steffen Weiss ,  Ronaldus Frederik Johannes Holthuizen ,  Sascha Krueger ,  Peter Koken ,  Daniel Wirtz ,  Thomas Erik Amthor ,  Alk Uhlemann

    发明人： Steffen Weiss ,  Ronaldus Frederik Johannes Holthuizen ,  Sascha Krueger ,  Peter Koken ,  Daniel Wirtz ,  Thomas Erik Amthor ,  Alk Uhlemann

    IPC分类号： A61B5/055 ,  A61B5/00 ,  A61B5/06

    CPC分类号： A61B5/055 ,  A61B5/064 ,  A61B5/6832 ,  A61B5/72 ,  G01R33/287 ,  G01R33/34084

    摘要： A medical apparatus (1100) comprising a magnetic resonance imaging system and an interventional device (300) comprising a shaft (302, 1014, 1120). The medical apparatus further comprises a toroidal magnetic resonance fiducial marker (306, 600, 800, 900, 1000, 1122) attached to the shaft. The shaft passes through a center point (610, 810, 908, 1006) of the fiducial marker. The medical apparatus further comprises machine executable instructions (1150, 1152, 1154, 1156, 1158) for execution by a processor. The instructions cause the processor to acquire (100, 200) magnetic resonance data, to reconstruct (102, 202) a magnetic resonance image (1142), and to receive (104, 204) the selection of a target volume (1118, 1144, 1168). The instructions further cause the processor to repeatedly: acquire (106, 206) magnetic resonance location data (1146) from the fiducial marker and render (108, 212) a view (1148, 1162) indicating the position of the shaft relative to the target zone.

    摘要翻译： 一种包括磁共振成像系统和包括轴（302,1014,1120）的介入装置（300）的医疗装置（1100）。 医疗装置还包括连接到轴的环形磁共振基准标记（306,600,800,900,1000,1122）。 轴通过基准标记的中心点（610,810,908,1006）。 医疗设备还包括用于由处理器执行的机器可执行指令（1150,1152,1154,1156,1158）。 所述指令使得所述处理器获取（100,200）磁共振数据，以重建（102,202）磁共振图像（1142），并且接收（104,204）所述目标体积（1118,1144， 1168）。 所述指令还使所述处理器重复地：从所述基准标记获取（106,206）磁共振位置数据（1146），并且渲染（108,212）指示所述轴相对于所述目标的位置的视图（1148,1162） 区。

    General inductive handpiece for active devices
    30.
    发明授权
    General inductive handpiece for active devices 有权
    有源器件的通用感应手机

    公开(公告)号：US09297866B2

    公开(公告)日：2016-03-29

    申请号：US13141092

    申请日：2009-11-23

    申请人： Sascha Krueger

    发明人： Sascha Krueger

    IPC分类号： A61B5/055 ,  G01R33/36 ,  G01R33/34

    CPC分类号： G01R33/34084 ,  A61B5/055 ,  G01R33/3628

    摘要： A handpiece defines a bore in which a proximal end of a catheter or other interventional instrument is received. An insulating support supports an interventional instrument which carries a transmission line winding in, but spaced from, the internal bore. A handpiece winding disposed along the bore interacts with the instrument transmission line winding to form an inductive coupling with the instrument transmission line winding. After the handpiece is slid axially to adjust the inductive coupling between the handpiece and windings, a locking mechanism functions in such a manner that the interventional instrument is inhibited from axial sliding motion relative to the handpiece while permitting rotation of the interventional instrument relative to the handpiece thus maintaining the inductive coupling while allowing optimal handling of the device.

    摘要翻译： 手柄定义了其中接收导管或其他介入器械的近端的孔。 绝缘支撑件支撑介入仪器，该介入仪器承载在内孔中但与内孔间隔开的传输线。 沿着孔设置的手持绕组与仪器传输线绕组相互作用，以形成与仪器传输线绕组的电感耦合。 在手持件滑动以调节手持件和绕组之间的感应耦合之后，锁定机构以这样的方式起作用，使得介入器械不受相对于手持件的轴向滑动运动，同时允许介入器械相对于手持件的旋转 从而保持电感耦合，同时允许设备的最佳处理。