Radiation control device with variable active surface

Details Radiation control device with variable active surface Radiation control device with variable active surface

1990-04-26

1991-09-17

Westin, Edward P.

X-ray or gamma ray systems or devices

Beam control

Collimator

378145, 378147, 378148, 378 16, 378 10, 378 37, G21K 104, A61B 604

Patent

active

050502000

ABSTRACT:
Disclosed is a radiology system of the mammography type wherein there is provision for a radiation controller having a detector of X-radiation having gone through the breast to be observed, of the type having a converter of X-radiation into photon radiation and a photomultiplier tube for the amplifications of photons emitted by the converter. The invention lies in the fact that the converter is masked by a belt opaque to the photon radiation except in the zones for which variable dimensions are planned so as to get adapted to the different shapes of breasts. The belt is driven by a motor which is turned on and off at the practitioner's command, so that the appropriate zone is in correspondence with the converter.

REFERENCES:
patent: 4577341 (1986-03-01), Schwieker et al.
patent: 4691335 (1987-09-01), Telorack

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