GABRIELE MARIANNE BECK,TIM NIELSEN,ARJAN WILLEM SIMONETTI,GWENAEL HENRI HERIGAULT,MATHIJS VISSER
申请号：
US14377213
公开号：
US20150323637A1
申请日:
2013.02.04
申请国别(地区):
US
年份:
2015
代理人:
摘要：
The invention relates to a method of MR imaging of at least a portion of a body (10) placed in a main magnetic field Bo within the examination volume of a MR device. It is an object of the invention to enable MR imaging with reliable motion detection and high image quality. The method of the invention comprises the following steps: subjecting the portion of the body (10) to an imaging sequence comprising one or more RF pulses and switched magnetic field gradients for acquiring imaging signals； subjecting the portion of the body (10) to a navigator sequence applied at least once before, during, or after the imaging sequence, the navigator sequence comprising one or more RF pulses and switched magnetic field gradients controlled in such a manner that navigator signals are acquired by means of a single-point or multi-point Dixon technique； deriving translation and/or rotation and/or shear data from the navigator signals, which translation and/or rotation and/or shear data reflect motion occurring within the body (10) during the acquisition of the imaging signals； reconstructing a MR image from the imaging signals, wherein the translation and/or rotation and/or shear data are used for adapting the imaging sequence and/or for motion correction during reconstruction of the MR image. Moreover, the invention relates to a MR device (1) and to a computer program to be run on a MR device (1).
