发明名称 |
MAGNETIC RESONANCE IMAGING DEVICE AND METHOD FOR MEASURING IRRADIATION MAGNETIC FIELD |
摘要 |
There is provided an MRI apparatus capable of measuring the B1 distribution of an RF transmission coil in a short time with high accuracy. In order to realize this, imaging means of the MRI apparatus includes a B1 distribution measurement sequence that includes an application of a pre-pulse by RF radiation means and a plurality of signal acquisition sequences with different elapsed time (TI) from the pre-pulse. The signal acquisition sequence uses a pulse having a small flip angle as an RF pulse and is executed before the longitudinal relaxation after the pre-pulse ends. Calculation means calculates the B1 distribution of the RF radiation means using image data with different TI acquired in the respective signal acquisition sequences. |
申请公布号 |
EP2636366(A1) |
申请公布日期 |
2013.09.11 |
申请号 |
EP20110837843 |
申请日期 |
2011.10.13 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
ITO, KOSUKE;TAKIZAWA, MASAHIRO;KUROKAWA, SHINJI |
分类号 |
A61B5/055;G01R33/24;G01R33/44;G01R33/56;G01R33/565 |
主分类号 |
A61B5/055 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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