Magnetic attraction preventive system
First Claim
Patent Images
1. A magnetic attraction preventive system comprising:
- an approach detection unit which generates an approach detection magnetic field and detects the approach of a magnetic material to a magnetic resonance imaging apparatus on the basis of a variation in the strength of the approach detection magnetic field; and
a preventive unit which prevents magnetic attraction of the magnetic material to the magnetic resonance imaging apparatus when the approach detection unit detects the approach of the magnetic material to the magnetic resonance imaging apparatus.
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Abstract
A magnetic attraction preventive system includes an approach detection unit which generates an approach detection magnetic field and detects the approach of a magnetic material to a magnetic resonance imaging apparatus on the basis of a variation in the strength of the approach detection magnetic field, and a preventive unit which prevents magnetic attraction of the magnetic material to the magnetic resonance imaging apparatus when the approach detection unit detects the approach of the magnetic material to the magnetic resonance imaging apparatus.
22 Citations
16 Claims
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1. A magnetic attraction preventive system comprising:
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an approach detection unit which generates an approach detection magnetic field and detects the approach of a magnetic material to a magnetic resonance imaging apparatus on the basis of a variation in the strength of the approach detection magnetic field; and a preventive unit which prevents magnetic attraction of the magnetic material to the magnetic resonance imaging apparatus when the approach detection unit detects the approach of the magnetic material to the magnetic resonance imaging apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A magnetic attraction preventive system comprising:
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an approach detection unit which detects the approach of a magnetic material to a magnetic resonance imaging apparatus; a preventive unit which prevents magnetic attraction of the magnetic material to the magnetic resonance imaging apparatus when the approach detection unit detects the approach of the magnetic material; and a cancellation magnetic field generation unit which generates a cancellation magnetic field to cancel out leakage magnetic fields from the magnetic resonance imaging apparatus.
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16. A magnetic attraction preventive system comprising:
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an approach detection unit which detects the approach of a magnetic material to a magnetic resonance imaging apparatus; a preventive unit which prevents magnetic attraction of the magnetic material to the magnetic resonance imaging apparatus when the approach detection unit detects the approach of the magnetic material; and a judgment unit which judges the presence or absence of a failure in the approach detection unit on the basis of an output of the approach detection unit.
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Specification