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    • 83. 发明申请
    • TUNABLE AND/OR DETUNABLE MR RECEIVE COIL ARRANGEMENTS
    • 可接受和/或解除接收线圈安排
    • WO2008020375A1
    • 2008-02-21
    • PCT/IB2007/053177
    • 2007-08-10
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHWEISS, Steffen
    • WEISS, Steffen
    • G01R33/28G01R33/34G01R33/00
    • G01R33/0283G01R33/287G01R33/34046G01R33/34076G01R33/34084G01R33/341G01R33/36G01R33/3657
    • MR receive (or reception) coil arrangements are disclosed which comprise at least one MR receive coil or coil element or coil system (9) which can be tuned and/or detuned in relation to an MR frequency, and which further comprise a transmission line (7) for electrically connecting the MR receive coil or coil element or coil system (9) with an MR receiver (10). Especially such MR receive coil arrangements are disclosed which are not provided for being stationarily (or permanently) installed or built in an examination zone of an MR imaging or examination system or apparatus (MRI system), like a whole-body coil system of such an MRI system, but which are mobile, like e.g. interventional or invasive devices, like catheters, or surface coils, e.g. in the form of (especially flexible) pads which are positioned on a surface of an examination object for examining a region of interest, or volume coils like birdcage coils for enclosing and examining a volume of interest. Finally, an MR imaging or examination system (MRI system) comprising such an MR receive coil arrangement is disclosed.
    • 公开了MR接收(或接收)线圈装置,其包括至少一个MR接收线圈或线圈元件或线圈系统(9),其可以相对于MR频率被调谐和/或失谐,并且还包括传输线 7),用于将MR接收线圈或线圈元件或线圈系统(9)与MR接收器(10)电连接。 特别地,公开了这样的MR接收线圈装置,其不被设置为静态(或永久地)安装或建立在MR成像或检查系统或装置(MRI系统)的检查区域中,例如这样的全身线圈系统 MRI系统,但是哪些是移动的,例如 介入或侵入性装置,如导管或表面线圈,例如导管。 (特别是柔性的)垫的形式,其位于用于检查感兴趣区域的检查对象的表面上,或者用于封闭和检查感兴趣体积的体积线圈如鸟笼线圈。 最后,公开了包括这种MR接收线圈装置的MR成像或检查系统(MRI系统)。
    • 84. 发明申请
    • SYSTEM FOR TRACKING MEDICAL DEVICE USING MAGNETIC RESONANCE DETECTION
    • 使用磁共振检测跟踪医疗器械的系统
    • WO2008015520A1
    • 2008-02-07
    • PCT/IB2007/002134
    • 2007-07-27
    • INSIGHTEC, LTDASSIF, Benny
    • ASSIF, Benny
    • A61B5/055A61B5/06G01R33/28A61B19/00
    • A61B5/06A61B5/055A61B2090/3958G01R33/287G01R33/4814
    • A system for using magnetic resonance to track a medical device, including an MR tracking device comprising one or more radiofrequency (RF) tracking coils adapted to receive a magnetic resonance MR response signal from nuclei excited by an RF pulse, the tracking device being attached to a medical device, wherein a dephasing gradient is applied perpendicular to the readout gradient before the RF response signal is received, thereby dephasing and attenuating any interfering signal emanating from remote nuclei, while the MR response signal is substantially unaffected. The system can also detect errors in tracking location by checking the amplitude of the signal from each coil and the detected distance between each coil, and correcting for such errors by ignoring data from coils having low amplitude or location deviating from known location relative to the other coils.
    • 一种使用磁共振来跟踪医疗设备的系统,包括一个MR跟踪设备,该MR跟踪设备包括一个或多个射频(RF)跟踪线圈,适用于从由RF脉冲激发的核接收磁共振MR响应信号,跟踪设备被附加到 医疗装置,其中在接收到RF响应信号之前垂直于读出梯度施加去相位梯度,从而相对于从远程核发出的任何干扰信号衰减和衰减,同时MR响应信号基本上不受影响。 该系统还可以通过检查来自每个线圈的信号的幅度和每个线圈之间的检测距离来检测跟踪位置中的错误,并且通过忽略具有相对于另一个的已知位置偏离低振幅或位置的线圈的数据来校正这种误差 线圈。
    • 90. 发明申请
    • MAGNETIC RESONANCE DEVICE AND METHOD
    • 磁共振装置及方法
    • WO2007122527A2
    • 2007-11-01
    • PCT/IB2007/051176
    • 2007-04-02
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.,PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHDAHNKE, HannesSCHAEFFTER, Tobias
    • DAHNKE, HannesSCHAEFFTER, Tobias
    • G01R33/28G01R33/48G01R33/3875
    • G01R33/286G01R33/3875G01R33/48G01R33/56536
    • The invention relates to a device for magnetic resonance imaging of a body (7). The device (1) comprises means (2) for establishing a substantially homogeneous main magnetic field in the examination volume, means (3, 4, 5) for generating switched magnetic field gradients superimposed upon the main magnetic field, means (6) for radiating RF pulses towards the body (7), control means (12) for controlling the generation of the magnetic field gradients and the RF pulses, means (10) for receiving and sampling magnetic resonance signals, and reconstruction means (14) for forming MR images from the signal samples. In accordance with the invention, the device 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 of RF pulses and switched magnetic field gradients, b) acquire the MR echo signals for reconstructing an MR image data set (21) therefrom, c) calculate a gradient map (22) by computing echo shift parameters (SP x , SP y , SP z ) from subsets of the MR image data set, the echo shift parameters (SP x , SP y , SP z ) indicating magnetic field gradient induced shifts of the echo positions in k-space, wherein each subset comprises a number (n) of spatially adjacent pixel or voxel values of the MR image data set (21).
    • 本发明涉及一种用于身体(7)的磁共振成像的装置。 装置(1)包括用于在检查体积中建立基本均匀的主磁场的装置(2),用于产生叠加在主磁场上的开关磁场梯度的装置(3,4,5),用于辐射的装置(6) 朝向身体的射频脉冲(7),用于控制磁场梯度和RF脉冲的产生的控制装置(12),用于接收和采样磁共振信号的装置(10)和用于形成MR图像的重构装置(14) 从信号样本。 根据本发明,该装置被设置成:a)通过使身体(7)的至少一部分经受RF脉冲和切换的磁场梯度的MR成像序列来产生一系列MR回波信号(20),b 获取用于重构MR图像数据集(21)的MR回波信号,c)通过计算回波移位参数(SP< x>,SP> 回波移位参数(SP< SUB>,SP< SUB>,SP< SUB> 指示磁场梯度引起k空间中的回波位置的移位,其中每个子集包括MR图像数据集(21)的空间相邻像素的数量(n)或体素值。