公开(公告)号：US20150260808A1

公开(公告)日：2015-09-17

申请号：US14434047

申请日：2013-10-01

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Ulrich Katscher ,  Hanno Heyke Homann ,  Peter Boernert

IPC: G01R33/36 ,  H03F3/19

CPC classification number: G01R33/3614 ,  G01R33/4833 ,  G01R33/4836 ,  G01R33/5612 ,  G01R33/5659 ,  G01R33/583 ,  H03F3/19 ,  H03F2200/451

Abstract: The present invention relates to a magnetic resonance imaging MRI system (100) for acquiring magnetic resonance data from a target volume in a subject (101), the magnetic resonance imaging system (100) comprising: a plurality of excitation means (201) for generating a slice-/or slab-selective spatial radio frequency RF excitation magnetic field targeting slice/slab spatial variations in the target volume, and a controller (219) coupled to the plurality of excitation means (201), wherein the controller (219) is adapted for: determining a power level required by the plurality of excitation means (201) for generating the slice-/or slab-selective spatial RF excitation magnetic field, decomposing the slice-/or slab-selective spatial RF excitation magnetic field into respective RF excitation constituents of the plurality of excitation means (201), controlling each of the plurality of excitation means (201) to simultaneously generate the respective RF excitation constituent, using the determined power level for acquiring the magnetic resonance data.

Abstract translation: 本发明涉及一种用于从受检者（101）中的目标体积获取磁共振数据的磁共振成像MRI系统（100），所述磁共振成像系统（100）包括：多个激励装置（201），用于产生 目标体积中靶向切片/板空间变化的切片/或板坯选择空间射频RF激励磁场;以及耦合到多个激励装置（201）的控制器（219），其中控制器（219）是 适于：确定所述多个激励装置（201）所需的用于产生所述切片选择空间射频激励磁场的平板选择空间RF激励磁场的功率电平，将所述切片选择空间射频激励磁场分解成相应的RF 多个激励装置（201）的激励成分，使用所述确定装置控制所述多个激励装置（201）中的每一个以同时产生相应的RF激励成分 用于获取磁共振数据的ned功率电平。

公开(公告)号：US20150253406A1

公开(公告)日：2015-09-10

申请号：US14432931

申请日：2013-09-11

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Kay Nehrke ,  Peter Boernert ,  Johan Michiel Den Harder ,  Thomas Hendrik Rozijn

IPC: G01R33/561 ,  A61B5/055 ,  G01R33/34 ,  G01R33/36 ,  G01R33/385

CPC classification number: G01R33/5611 ,  A61B5/055 ,  G01R33/246 ,  G01R33/34 ,  G01R33/36 ,  G01R33/385

Abstract: 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 (a) radiated toward a portion of a body (10) during a preparation period (21), and ii) one or more reading RF pulses 03) 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 (I1) and one or more stimulated echo signals (I2) 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 (I1) and/or from the acquired stimulated echo signals (I2). 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).

Abstract translation: 本发明涉及一种并行MR成像的方法，其中通过受激回波序列执行参考扫描，所述回波序列包括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（a） （21），以及ii）在所述准备期间（21）之后的采集周期（22）期间朝向所述身体（10）的所述部分辐射的一个或多个读取RF脉冲03）。 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 - 如果可应用的传输4灵敏度分布是从所获取的FID信号（I1）和/或从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。