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再収束RFパルスのフリップ角制御法及び磁気共鳴イメージング装置
专利权人:
株式会社日立製作所
发明人:
星野 裕介
申请号:
JP2012238585
公开号:
JP6084430B2
申请日:
2012.10.30
申请国别(地区):
JP
年份:
2017
代理人:
摘要:
PROBLEM TO BE SOLVED: To control the flip angle of refocus RF pulses in an FSE sequence so as to be able to obtain an image with contrast equivalent to a conventional FSE sequence in which the flip angle of RF pulses is kept constant at 180° while the SAR is reduced.SOLUTION: When an image is captured using an imaging sequence in which a 180°-FSE sequence having refocus RF pulses with a flip angle of 180° is combined with a VRFA-FSE sequence having refocus RF pulses with a variable flip angle of 180° or less, the 180°-FSE sequence is used for measurement of echo signals to fill a low-frequency region of a k-space, and the VRFA-FSE sequence is used for measurement of echo signals to fill a high-frequency region of the k-space.
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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