X-ray or gamma ray systems or devices – Nonphotographic detector support
Patent
1989-08-15
1992-06-30
Howell, Janice A.
X-ray or gamma ray systems or devices
Nonphotographic detector support
378 65, 378190, H01J 3150
Patent
active
051270323
ABSTRACT:
A multi-directional x-ray imager for use with an isocentric therapy x-ray machine having a rotatable x-ray source. The imager has a fluorescence screen which emits light when excited by x-rays from the source and an imaging camera which images the light emission. A rotational joint rotates and aligns the screen relative to a different rotated position of the source relative to the patient. The camera is positioned out of the straight line path of the x-rays passing through the screen, amd a deflecting mirror deflects the emitted light to the camera. The mirror includes a thin sheet of reflective material, such as aluminized plastic, to prevent the x-rays impinging thereon from scattering to the (solid state video) camera.
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Lam Veronica
Lam Wing-Chee
Howell Janice A.
Johns Hopkins University
Porta David P.
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