Radiation control device with variable active surface of the typ

Details Radiation control device with variable active surface of the typ Radiation control device with variable active surface of the typ

1990-04-26

1992-01-21

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Mammography

378145, A61B 604

Patent

active

050833057

ABSTRACT:
Disclosed is a radiology system of the mammograph type in which there is provision for a radiation controller. The invention lies in the fact that the input aperture of the detector is masked by a belt that absorbs the X-radiation except at zones, the variable dimensions of which are designed to get adapted to the different shapes of breasts. The belt is driven by a motor 24 and stops at the practitioner's command so that the appropriate zone is in correspondence with the input aperture of the detector 22.

REFERENCES:
patent: 3824397 (1974-07-01), Bauer et al.
patent: 3991316 (1976-11-01), Schmidt et al.
patent: 4707846 (1987-11-01), Sportelli
patent: 4825455 (1989-04-01), Bauer
patent: 4943991 (1990-07-01), Mosby
patent: 4947417 (1990-08-01), Hartwell
Radiology, 125, 1978, U.S.A., pp. 517-523, Muntz, et al., "Preliminary Studies Using Electron Radiography for Mammography".

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