Magnetic resonance imaging apparatus

Details Magnetic resonance imaging apparatus Magnetic resonance imaging apparatus

1989-04-27

1991-01-01

Howell, Kyle L.

Surgery

Truss

Pad

324318, 381 94, 381168, A61B 5055

Patent

active

049811371

ABSTRACT:
A magnetic resonance imaging apparatus for taking a pateint into a air-core of a static magnetic field coil which forms a static magnetic field and a gradient coil which forms a gradient magnetic field and imaging a tomogram of the patient comprising, a microphone disposed in a domain which is on the extension of an air-core and out of the end of the static magnetic field coil, wherein a directivity axis of the microphone is directed to the patient, an amplifier for amplifying an output signal of the microphone, and a first loudspeaker which is connected to the amplifier.
Operator clearly hear the patient's voice in spite of the noise of the striking sound generated from the gradient coil.

REFERENCES:
patent: 4410770 (1983-10-01), Hagey
patent: 4689565 (1987-08-01), Kemner et al.
patent: 4696030 (1987-09-01), Egozi
patent: 4701952 (1987-10-01), Taylor
patent: 4903703 (1990-02-01), Igarashi et al.

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