发明名称 |
Inspection method and apparatus using nuclear magnetic resonance |
摘要 |
An inspection method by means of an inspection apparatus using nuclear magnetic resonance and having magnetic field generating apparatus for generating a static magnetic field, gradient magnetic fields and an RF magnetic field; magnetic field generating apparatus by means of additional shim coils, which vary homogeneity of the static magnetic field by varying current flowing therethrough; signal detecting apparatus for detecting nuclear magnetic resonance signals from an object to be inspected; an apparatus for processing signals detected by the signal detecting apparatus; and control apparatus for controlling currents flowing through the shim coils, which method using nuclear magnetic resonance comprises a step of storing shim currents corresponding to each of a plurality of slices, capable of improving homogeneity of the static magnetic field for each of the plurality of slices, and a step of switching over the shim currents to those corresponding to a relevant slice to be measured prior to measurements of nuclear magnetic resonance signals from the slice. This inspection method can be applied also to a case where measurements of other slices are effected in intervals of measurements of the relevant slice.
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申请公布号 |
US5602480(A) |
申请公布日期 |
1997.02.11 |
申请号 |
US19950422234 |
申请日期 |
1995.04.14 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
ONODERA, YUKARI;YAMAMOTO, ETSUJI;ITAGAKI, HIROYUKI;TANIGUCHI, YO |
分类号 |
G01R33/3875;G01R33/54;(IPC1-7):G01R33/20 |
主分类号 |
G01R33/3875 |
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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