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1. 发明申请

WO2010109394A1 MR IMAGING USING PARALLEL SIGNAL ACQUISITION 审中-公开
标题翻译：使用并行信号获取的成像
公开(公告)号：WO2010109394A1
公开(公告)日：2010-09-30
申请号：PCT/IB2010/051217
申请日：2010-03-22
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , FUDERER, Miha , PEETERS, Johannes, M. , ROZIJN, Thomas, H. , DUIJNDAM, Adrianus, J., W. , JURRISSEN, Michel, P., J. , BENSCHOP, Franciscus, J., M.
发明人： FUDERER, Miha , PEETERS, Johannes, M. , ROZIJN, Thomas, H. , DUIJNDAM, Adrianus, J., W. , JURRISSEN, Michel, P., J. , BENSCHOP, Franciscus, J., M.
IPC分类号： G01R33/561
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）。

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