| 摘要 |
PROBLEM TO BE SOLVED: To prevent tools used for operation and peripheral devices whose approach to the leakage magnetic field generated by a magnetic resonance imaging apparatus is not preferable from approaching the leakage magnetic field and to avoid dangerous state caused by approach even in the case of approach. SOLUTION: In an operating room, operating tools, tool stands carrying the tools, and peripheral devices such as a drip, an electrocardiograph and a microscope for operation are existent in addition to the magnetic imaging apparatus for testing and a bed. These devices are formed of magnetic substance, so they have high risk of being magnetized by leakage magnetic field from the magnetic resonance imaging apparatus and attracted. Magnetic sensor means are disposed in all spaces of the magnetic resonance imaging apparatus, peripheral devices or operating room, the magnetic field strength in the operating room is detected by the magnetic sensor means, and if it enters the dangerous state, a warning is given by the display means, or the moving magnetic resonance imaging apparatus is stopped or moved backward. COPYRIGHT: (C)2003,JPO
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