X-ray diagnostic system comprising tomographic apparatus

Details X-ray diagnostic system comprising tomographic apparatus X-ray diagnostic system comprising tomographic apparatus

1980-10-15

1982-11-02

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Tomography

378 27, 378 91, G03B 4116

Patent

active

043577083

ABSTRACT:
In the exemplary embodiments the path of movement of the photographic exposure unit comprised of an x-ray tube and image layer (or film) carrier can be selected. For determination of the photographic exposure time, either an mAs-relay or an automatic exposure timer with a radiation detector may be placed in control of the energization of the x-ray tube. The x-ray tube current or the current of the radiation detector are integrated and the integrator contents are sampled at a predetermined time following commencement of the photographic exposure. The sampled value is compared with a reference value and the running speed of the photographic exposure unit is influenced in such a fashion that the photographic exposure time determined by the switching of the mAs-relay or by the automatic exposure timer approximately corresponds to the running time of the photographic exposure unit.

REFERENCES:
patent: 4039836 (1977-08-01), Shaw

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