Radiation imaging system with cyclically shiftable grid assembly

Details Radiation imaging system with cyclically shiftable grid assembly Radiation imaging system with cyclically shiftable grid assembly

1980-11-24

1983-04-12

Smith, Alfred E.

X-ray or gamma ray systems or devices

Beam control

Antiscatter grid

A61B 600

Patent

active

043800866

ABSTRACT:
An X-ray spot filmer is disclosed including a system for cyclically shifting a grid assembly interposed between an X-ray source and a film cassette. The system comprises an electrically energizable grid assembly actuator and an actuator controller for energizing the actuator to cyclically shift the grid assembly. The actuator controller includes actuator energizing output circuitry effective to govern the direction and speed of operation of the actuator in response to a control signal and control signal generator circuitry for producing control signals effective to govern operation of the output circuitry including an oscillator for producing a cyclically varying control signal which causes cyclic grid assembly shifting.

REFERENCES:
patent: 2554051 (1951-05-01), Newton
patent: 2591536 (1952-04-01), Gieringer et al.
patent: 2864004 (1958-12-01), Nemet et al.

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