X-ray diagnostic apparatus comprising radiation filters

Details X-ray diagnostic apparatus comprising radiation filters X-ray diagnostic apparatus comprising radiation filters

1984-10-26

1988-05-10

Howell, Janice A.

X-ray or gamma ray systems or devices

Beam control

Filter

378156, 378 37, 378 95, G21K 300

Patent

active

047440996

ABSTRACT:
A positioning control system controls the shifting of one of a plurality of radiation filters into the ray path. Transducers provide an electric density signal which is dependent upon the density of the examination subject. The control system has an electromotor activated by a control circuit to which the density signal is applied and which activates the motor corresponding to the respective density signal for the purpose of selection of the correct filter. The transducers may be coupled with a device physically acting in compression on a body part of the patient to be examined such that the degree of resistance of the body part to compression is sensed by the transducers as a measure of patient density.

REFERENCES:
patent: 3706888 (1972-12-01), Wunsch
patent: 3976889 (1976-08-01), Noske et al.
patent: 4090084 (1978-05-01), Epstein et al.
patent: 4403337 (1983-09-01), Kleinman

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