Collimator logic control system

Details Collimator logic control system Collimator logic control system

1982-03-30

1984-05-15

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Collimator

378 91, G03B 4116

Patent

active

044492286

ABSTRACT:
An improved PBL X-ray system in which the collimator is automatically adjusted so that the X-ray field size at an image receptor conforms to the image receptor size and the X-ray source to image receptor distance. Swivelling of the collimator in a plane parallel to the image receptor is detected and operation of the X-ray source is disabled. Manual operation may be obtained by removing the image receptor from its holder. Swivelling the collimator plus or minus 90.degree. exchanges the normally detected image receptor cross and longitudinal dimensions to automatically realign the collimator and image receptor axis. A PBL time delay is provided to prevent premature and undesired operation of the collimator shutters.

REFERENCES:
patent: 3643095 (1972-02-01), Shuster
patent: 3947689 (1976-03-01), Wagner
patent: 4137460 (1979-01-01), Fitzsimmons

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