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1. 发明申请

WO2014053927A1 METAL RESISTANT MR IMAGING REFERENCE SCAN 审中-公开
标题翻译：金属电阻成像参考扫描
公开(公告)号：WO2014053927A1
公开(公告)日：2014-04-10
申请号：PCT/IB2013/058447
申请日：2013-09-11
申请人： KONINKLIJKE PHILIPS N.V. , PHILIPS DEUTSCHLAND GMBH
发明人： NEHRKE, Kay , BOERNERT, Peter , DEN HARDER, Johan Michiel , ROZIJN, Thomas Hendrik
IPC分类号： G01R33/24
CPC分类号： G01R33/5611 , A61B5/055 , G01R33/246 , G01R33/34 , G01R33/36 , G01R33/385
摘要： The invention relates to a method of parallel MR imaging, wherein a reference scan is performed by means of a stimulated echo sequence including i) at least two preparation RF pulses (α) radiated toward a portion of a body (10) during a preparation period (21), and ii) one or more reading RF pulses (β) radiated toward the portion of the body (10) during an acquisition period (22) temporally subsequent to the preparation period (21). One or more FID signals (I 1 ) and one or more stimulated echo signals (I 2 ) are acquired during the acquisition period (22). The spatial receive and/or -if applicable -transmit4 sensitivity profiles of at least two RF coils (11, 12, 13) are derived from the acquired FID signals (I 1 ) and/or from the acquired stimulated echo signals (I 2 ). The parameters of the stimulated echo sequence are selected such that it is robust against susceptibility-induced artefacts. Moreover, 10 the invention relates to a MR device (1) and to a computer program for a MR device (1).
摘要翻译：本发明涉及一种并行MR成像方法，其中通过受激回波序列执行参考扫描，包括i）在准备期间向身体（10）的一部分辐射的至少两个准备RF脉冲（α）（21），以及ii）在所述准备期间（21）之后的获取期间（22）期间向所述身体（10）的所述部分辐射的一个或多个读取RF脉冲（＆bgr）。在采集周期（22）期间获取一个或多个FID信号（I1）和一个或多个受激回波信号（I2）。至少两个RF线圈（11,12,13）的空间接收和/或 - 适用的 - 传输4灵敏度分布是从所获取的FID信号（I1）和/或从所获取的受激回波信号（I2）导出的。选择刺激回波序列的参数，使其对抗敏感性诱导的伪像是鲁棒的。此外，本发明涉及MR装置（1）和用于MR装置（1）的计算机程序。

2. 发明公开

EP3413074A1 PARALLEL MULTI-SLICE MR IMAGING 审中-公开
公开(公告)号：EP3413074A1
公开(公告)日：2018-12-12
申请号：EP17175156.3
申请日：2017-06-09
申请人： Koninklijke Philips N.V.
发明人： JURRISSEN, Michel Paul Jurriaan , NISTI GRIGOLETTO BORGONOVI, Arthur Felipe , ROZIJN, Thomas Hendrik
IPC分类号： G01R33/561 , G01R33/483 , G01R33/565
CPC分类号： G01R33/5611 , G01R33/4835 , G01R33/5616 , G01R33/56509
摘要： The invention relates to a method of MR imaging of an object (10) placed in an examination volume of a MR device (1). The method comprises the steps of:
- generating MR signals by subjecting the object (10) to a number N of shots of a multi-echo imaging sequence comprising multi-slice RF pulses (21) for simultaneously exciting two or more spatially separate image slices, with a phase offset in the slice direction being imparted to the MR signals, wherein the phase offset is varied from shot to shot,
- acquiring the MR signals, wherein the MR signals are received in parallel via a set of at least two RF coils (11, 12, 13) having different spatial sensitivity profiles within the examination volume, and
- reconstructing a MR image for each image slice from the acquired MR signals using a parallel reconstruction algorithm, wherein the MR signal contributions from the different image slices are separated on the basis of the spatial encodings of the MR signals according to the spatial sensitivity profiles of the RF coils (11, 12, 13) and on the basis of the phase offsets attributed to the respective image slices and shots. Moreover, the invention relates to a MR device for carrying out this method as well as to a computer program to be run on a MR device.

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