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フローアーチファクトの抑制を伴うMR撮像
专利权人:
コーニンクレッカ フィリップス エヌ ヴェ
发明人:
エッゲルス,ホルガー,ベールネルト,ペーター
申请号:
JP2014548256
公开号:
JP6046742B2
申请日:
2012.11.26
申请国别(地区):
JP
年份:
2016
代理人:
摘要:
The invention relates to a method of MR imaging of a body (10) placed in the examination volume of a MR device (1). It is an object of the invention to provide a method that enables efficient compensation of flow artefacts, especially for contrast-enhanced MR angiography in combination with Dixon water/fat separation. The method of the invention comprises the steps M of: a) generating at least two gradient echo signals at two different echo times by subjecting the portion of the body (10) to an imaging sequence of RF pulses and switched magnetic field gradients, wherein the 0th moment of the readout magnetic field gradient essentially vanishes at the time of the first gradient echo, the 1st moment of the readout gradient being non-zero at the time of the en first gradient echo, while both the 0th and 1st moments of the readout magnetic field gradient essentially vanish at the time of the second gradient echo b) acquiring the gradient echo signals c) repeating steps a) and b) for a plurality of phase encoding steps. Moreover, the invention relates to a MR device for carrying out the method of the invention and to a computer program to be run on a MR device d) reconstructing a first MR image from the gradient echo signals of the first gradient echo and a second MR image from the gradient echo signals of the second gradient echo and e) identifying ghosting artefacts in the first and/or second MR image by comparing the first and second MR images.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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