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    MR IMAGING USING PARALLEL SIGNAL ACQUISITION
    2.
    发明申请
    MR IMAGING USING PARALLEL SIGNAL ACQUISITION 有权
    使用并行信号获取的成像

    公开(公告)号：US20120001633A1

    公开(公告)日：2012-01-05

    申请号：US13254466

    申请日：2010-03-22

    申请人： Miha Fuderer ,  Johannes Martinus Peeters ,  Thomas Hendrik Rozijn ,  Adrianus Joseph Willibrordus Duijndam ,  Michel Paul Jurriaan Jurrissen ,  Franciscus Johannes Maria Benschop

    发明人： Miha Fuderer ,  Johannes Martinus Peeters ,  Thomas Hendrik Rozijn ,  Adrianus Joseph Willibrordus Duijndam ,  Michel Paul Jurriaan Jurrissen ,  Franciscus Johannes Maria Benschop

    IPC分类号： G01R33/44

    CPC分类号： G01R33/5611 ,  G01R33/543

    摘要： The invention relates to a method of MR imaging of at least a portion of a body (10) of a patient placed in an examination volume of an MR device (1). The object of the invention is to provide an improved, i.e. faster, parallel imaging technique. The invention proposes to acquire a survey signal data set (21, 22) at a low image resolution, which survey signal data set (21, 22) includes MR signals received in parallel or successively via a volume RF coil (9) and via a set of array RF coils (11, 12, 13). Spatial sensitivity profiles (23) of the array RF coils (11, 12, 13) are determined from the low resolution data. As a next step, a reference scan is performed in which a reference signal data set (25) is acquired at intermediate resolution solely via the array RF coils (11, 12, 13). The spatial sensitivity profiles (27) of the array RF coils (11, 12, 13) are determined from the data acquired at intermediate resolution and from the spatial sensitivity profiles (23) determined before at low resolution. Finally, a diagnostic scan is performed, in which a diagnostic signal data set (29) is acquired in parallel via the array RF coils (11, 12, 13) at high resolution. The diagnostic signal data set (29) may be acquired in a sub-sampled fashion. A diagnostic MR image (30) is then reconstructed from the diagnostic signal data set (29) and from the spatial sensitivity profiles (27) determined at the intermediate resolution, for example by using the SENSE or SMASH algorithm.

    摘要翻译： 本发明涉及放置在MR装置（1）的检查体积中的患者的身体（10）的至少一部分的MR成像方法。 本发明的目的是提供一种改进的，即更快的并行成像技术。 本发明提出以低图像分辨率获取测量信号数据集（21,22），该测量信号数据集（21,22）包括并行或连续经由体积RF线圈（9）接收的MR信号，并且经由 阵列RF线圈组（11,12,13）。 从低分辨率数据确定阵列RF线圈（11,12,13）的空间灵敏度分布（23）。 作为下一步，执行参考扫描，其中仅通过阵列RF线圈（11,12,13）以中间分辨率获取参考信号数据组（25）。 阵列RF线圈（11,12,13）的空间灵敏度分布（27）由在中间分辨率下获得的数据和从低分辨率之前确定的空间灵敏度分布（23）确定。 最后，执行诊断扫描，其中以高分辨率经由阵列RF线圈（11,12,13）并行获取诊断信号数据组（29）。 可以以亚采样的方式获取诊断信号数据集（29）。 然后，例如通过使用SENSE或SMASH算法，从诊断信号数据集（29）和从中间分辨率确定的空间灵敏度分布（27）重构诊断MR图像（30）。

    Parallel magnetic resonance imaging
    3.
    发明授权
    Parallel magnetic resonance imaging 有权
    并行磁共振成像

    公开(公告)号：US07741846B2

    公开(公告)日：2010-06-22

    申请号：US11571003

    申请日：2005-06-22

    申请人： Michel Paul Jurriaan Jurrissen ,  Miha Fuderer

    发明人： Michel Paul Jurriaan Jurrissen ,  Miha Fuderer

    IPC分类号： G01V3/00

    CPC分类号： G01R33/5611

    摘要： The invention relates to a device (1) for magnetic resonance imaging of a body (7) placed in a stationary and substantially homogeneous main magnetic field. In order to provide an MR device (1) which is arranged to automatically select an optimum subsampling scheme for three-dimensional SENSE, the invention proposes to select the subsampling scheme such that the maximum number of folded-over image values is minimized and simultaneously distances between the positions of the folded-over image values within the predetermined field of view are maximized.

    摘要翻译： 本发明涉及一种用于主体（7）的磁共振成像的装置（1），其放置在静止且基本均匀的主磁场中。 为了提供一种被设置为自动选择用于三维SENSE的最佳子采样方案的MR设备（1），本发明提出选择子采样方案，使得折叠图像值的最大数量最小化，同时距离 在预定视野内的折叠图像值的位置之间最大化。

    MRI method for correcting amplitude of resonance signals
    5.
    发明授权
    MRI method for correcting amplitude of resonance signals 失效
    用于校正谐振信号幅度的MRI方法

    公开(公告)号：US06897653B2

    公开(公告)日：2005-05-24

    申请号：US09992699

    申请日：2001-11-14

    申请人： Johan Samuel Van Den Brink ,  Miha Fuderer

    发明人： Johan Samuel Van Den Brink ,  Miha Fuderer

    IPC分类号： G01R33/36 ,  A61B5/055 ,  G01R33/565 ,  G01V3/00

    CPC分类号： G01R33/56518

    摘要： In a magnetic resonance imaging method flow quantities and diffusion quantities are measured in the presence of temporary magnetic gradient fields (gradient pulses). Signal amplitudes of the magnetic resonance signals and/or flow and diffusion quantities calculated from the magnetic resonance signals are corrected for non-linearities in the magnetic gradient fields.

    摘要翻译： 在磁共振成像方法中，在临时磁梯度场（梯度脉冲）的存在下测量流量和扩散量。 根据磁共振信号计算的磁共振信号和/或流量和扩散量的信号幅度被校正为磁梯度场中的非线性。

    MR imaging using parallel signal acquisition
    6.
    发明授权
    MR imaging using parallel signal acquisition 有权
    MR成像采用并行信号采集

    公开(公告)号：US08866476B2

    公开(公告)日：2014-10-21

    申请号：US13254466

    申请日：2010-03-22

    申请人： Miha Fuderer ,  Johannes Martinus Peeters ,  Thomas Hendrik Rozijn ,  Adrianus Joseph Willibrordus Duijndam ,  Michel Paul Jurriaan Jurrissen ,  Franciscus Johannes Maria Benschop

    发明人： Miha Fuderer ,  Johannes Martinus Peeters ,  Thomas Hendrik Rozijn ,  Adrianus Joseph Willibrordus Duijndam ,  Michel Paul Jurriaan Jurrissen ,  Franciscus Johannes Maria Benschop

    IPC分类号： G01V3/00 ,  G01R33/561 ,  G01R33/54

    CPC分类号： G01R33/5611 ,  G01R33/543

    摘要： The invention relates to a method of MR imaging of at least a portion of a body (10) of a patient placed in an examination volume of an MR device (1). The object of the invention is to provide an improved, i.e. faster, parallel imaging technique. The invention proposes to acquire a survey signal data set (21, 22) at a low image resolution, which survey signal data set (21, 22) includes MR signals received in parallel or successively via a volume RF coil (9) and via a set of array RF coils (11, 12, 13). Spatial sensitivity profiles (23) of the array RF coils (11, 12, 13) are determined from the low resolution data. As a next step, a reference scan is performed in which a reference signal data set (25) is acquired at intermediate resolution solely via the array RF coils (11, 12, 13). The spatial sensitivity profiles (27) of the array RF coils (11, 12, 13) are determined from the data acquired at intermediate resolution and from the spatial sensitivity profiles (23) determined before at low resolution. Finally, a diagnostic scan is performed, in which a diagnostic signal data set (29) is acquired in parallel via the array RF coils (11, 12, 13) at high resolution. The diagnostic signal data set (29) may be acquired in a sub-sampled fashion. A diagnostic MR image (30) is then reconstructed from the diagnostic signal data set (29) and from the spatial sensitivity profiles (27) determined at the intermediate resolution, for example by using the SENSE or SMASH algorithm.

    摘要翻译： 本发明涉及放置在MR装置（1）的检查体积中的患者的身体（10）的至少一部分的MR成像方法。 本发明的目的是提供一种改进的，即更快的并行成像技术。 本发明提出以低图像分辨率获取测量信号数据集（21,22），该测量信号数据集（21,22）包括并行或连续经由体积RF线圈（9）接收的MR信号，并且经由 阵列RF线圈组（11,12,13）。 从低分辨率数据确定阵列RF线圈（11,12,13）的空间灵敏度分布（23）。 作为下一步，执行参考扫描，其中仅通过阵列RF线圈（11,12,13）以中间分辨率获取参考信号数据组（25）。 阵列RF线圈（11,12,13）的空间灵敏度分布（27）由在中间分辨率下获得的数据和从低分辨率之前确定的空间灵敏度分布（23）确定。 最后，执行诊断扫描，其中以高分辨率经由阵列RF线圈（11,12,13）并行获取诊断信号数据组（29）。 可以以亚采样的方式获取诊断信号数据集（29）。 然后，例如通过使用SENSE或SMASH算法，从诊断信号数据集（29）和从中间分辨率确定的空间灵敏度分布（27）重构诊断MR图像（30）。

    Moving table MRI with subsampling in parallel
    8.
    发明授权
    Moving table MRI with subsampling in parallel 失效
    移动表MRI并行采样

    公开(公告)号：US07417429B2

    公开(公告)日：2008-08-26

    申请号：US10547196

    申请日：2004-02-18

    申请人： Miha Fuderer ,  Paul Royston Harvey ,  Johan Samuel Van Den Brink

    发明人： Miha Fuderer ,  Paul Royston Harvey ,  Johan Samuel Van Den Brink

    IPC分类号： G01V3/00

    CPC分类号： G01R33/56375 ,  G01R33/5611

    摘要： A novel magnetic resonance imaging method is described, for forming an image of an object from a plurality of signals sampled in a restricted homogeneity region of a main magnet field of a magnetic resonance imaging apparatus. A patient disposed on a table is moved continuously through the bore of the main magnet and spins in a predetermined area of the patient are excited by an excitation pulse from a transmitter antenna, such that an image is formed over a region exceeding largely the restricted region. Data is undersampled in the restricted region by means off at least one receiver antenna in a plurality of receive situations being defined as a block of measurements contiguous in time having preserved magnetisation and presaturation conditions within the excited area of the patient. Fold-over artefacts due to said undersampling are unfolded by means of the known sensitivity pattern of the receiver antenna and/or the properties of selected factors determining said receive situations.

    摘要翻译： 描述了一种新颖的磁共振成像方法，用于从在磁共振成像装置的主磁场的受限同质区域中采样的多个信号形成物体的图像。 设置在桌子上的患者连续移动通过主磁体的孔并且在患者的预定区域中的旋转被来自发射器天线的激励脉冲激发，使得在超过大部分限制区域的区域上形成图像 。 通过在多个接收情况中的至少一个接收机天线被限定为在时间上相邻的测量块，其在患者的激动区域内保持了磁化和预饱和状态，因此在受限区域中数据被欠采样。 由于所述欠采样引起的折叠伪影通过接收机天线的已知灵敏度图案和/或确定所述接收情况的选定因素的特性而展开。

    Moving Table Mri
    9.
    发明申请
    Moving Table Mri 审中-公开
    移动表Mri

    公开(公告)号：US20080262340A1

    公开(公告)日：2008-10-23

    申请号：US11569069

    申请日：2005-05-12

    申请人： Cornelis Leonardus Gerardus Ham ,  Miha Fuderer ,  Johan Samuel Van Den Brink

    发明人： Cornelis Leonardus Gerardus Ham ,  Miha Fuderer ,  Johan Samuel Van Den Brink

    IPC分类号： A61B5/055 ,  G01R33/563

    CPC分类号： G01R33/56375

    摘要： The invention relates to a MRI system and to a method for producing an image with such an system. In order to provide a MR imaging technique with a high efficient MR signal acquisition, which provides a high level of comfort to a patient, a MRI system and method are suggested, where image data from an object are acquired while the object is moving with variable speed relative to the MRI system, and where the image data are combined and an image of the object is reconstructed.

    摘要翻译： 本发明涉及一种MRI系统和一种用这种系统生产图像的方法。 为了提供具有高效MR信号采集的MR成像技术，其为患者提供高水平的舒适性，建议了MRI系统和方法，其中在物体运动时获取来自对象的图像数据， 相对于MRI系统的速度，并且其中图像数据被组合并且重建对象的图像。

    MR imaging using multi-channel RF excitation
    10.
    发明授权
    MR imaging using multi-channel RF excitation 有权
    MR成像采用多通道RF激发

    公开(公告)号：US08938281B2

    公开(公告)日：2015-01-20

    申请号：US13496085

    申请日：2010-09-27

    申请人： Miha Fuderer ,  Thomas Hendrik Rozijn ,  Ulrich Katscher ,  Kay Nehrke ,  Paul Royston Harvey

    发明人： Miha Fuderer ,  Thomas Hendrik Rozijn ,  Ulrich Katscher ,  Kay Nehrke ,  Paul Royston Harvey

    IPC分类号： A61B5/05 ,  G01R33/561 ,  G01R33/565

    CPC分类号： G01R33/5612 ,  G01R33/246 ,  G01R33/5659

    摘要： The invention relates to a magnetic resonance imaging apparatus including an array of two or more RF antennas for transmitting RF pulses to and receiving MR signals from a subject positioned in an examination volume, and where the RF antennas have spatial transmit and receive sensitivity profiles. The apparatus is configured to control the temporal succession, the phase, and the amplitude of the RF feeding of each individual RF antenna. The apparatus is also configured to determine the phases and amplitudes from the spatial transmit sensitivity profiles of the RF antennas, and reconstruct a MR image from a combination of the received MR signals received via the individual RF antennas and from the spatial receive sensitivity profiles of the RF antennas. Further, the apparatus is configured to determine the spatial transmit sensitivity profiles of the RF antennas from the spatial receive sensitivity profiles of the RF antennas, or vice versa.

    摘要翻译： 本发明涉及一种磁共振成像设备，包括两个或更多个RF天线的阵列，用于将RF脉冲发送到定位在检查体积中的被摄体并接收MR信号，并且其中RF天线具有空间发射和接收灵敏度分布。 该装置被配置为控制每个单独RF天线的RF馈送的时间连续性，相位和幅度。 该装置还被配置为根据RF天线的空间发射灵敏度分布来确定相位和振幅，并且从经由各个RF天线接收的接收的MR信号和从RF天线的空间接收灵敏度分布的组合重建MR图像 射频天线。 此外，该装置被配置为根据RF天线的空间接收灵敏度分布来确定RF天线的空间发射灵敏度分布，反之亦然。