Invention Grant
US09594140B2 Magnetic resonance imaging apparatus and method for calculating correction value as application amount of refocusing pulse for UTE sequence
有权
用于计算校正值作为UTE序列的重聚焦脉冲的应用量的磁共振成像装置和方法
- Patent Title: Magnetic resonance imaging apparatus and method for calculating correction value as application amount of refocusing pulse for UTE sequence
- Patent Title (中): 用于计算校正值作为UTE序列的重聚焦脉冲的应用量的磁共振成像装置和方法
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Application No.: US14232470Application Date: 2012-08-21
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Publication No.: US09594140B2Publication Date: 2017-03-14
- Inventor: Hikaru Hanada , Kuniharu Oka , Masaharu Ono , Masahiro Takizawa
- Applicant: Hikaru Hanada , Kuniharu Oka , Masaharu Ono , Masahiro Takizawa
- Applicant Address: JP Tokyo
- Assignee: HITACHI, LTD.
- Current Assignee: HITACHI, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2011-181739 20110823
- International Application: PCT/JP2012/071020 WO 20120821
- International Announcement: WO2013/027710 WO 20130228
- Main IPC: G01V3/00
- IPC: G01V3/00 ; G01R33/561 ; A61B5/055 ; G01R33/48
Abstract:
In order to obtain a high-quality image even in multi-slice imaging in a UTE sequence that uses a half RF pulse, a refocusing pulse of the slice gradient magnetic field is adjusted and applied so that the excitation profiles of positive polarity data and negative polarity data have phase distributions that are 180 [deg] inverted with respect to each other in side lobe portions. In addition, the irradiation frequency of the half RF pulse is adjusted so as to eliminate a position shift between the intensity distributions of the positive polarity data and the negative polarity data.
Public/Granted literature
- US20140167752A1 MAGNETIC RESONANCE IMAGING APPARATUS AND CORRECTION VALUE CALCULATION METHOD Public/Granted day:2014-06-19
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