Method and apparatus for calibrating rapid sequence radiography

Details Method and apparatus for calibrating rapid sequence radiography Method and apparatus for calibrating rapid sequence radiography

1981-11-13

1983-08-23

Church, Craig E.

X-ray or gamma ray systems or devices

Accessory

Testing or calibration

378158, 378159, 378165, G03B 4116, G21K 300

Patent

active

044008279

ABSTRACT:
By moving a wedge (18) within the radiographic field during exposure of an area of interest, steps of the wedge are presented one by one at the same film location over sequential exposures. Wedge steps are thus superimposed over an identical position within the radiographic field, and a correlation may then be made between wedge step thickness and film optical density over successive exposures for calibrating the radiographs. A preferred form of the stepped wedge is circular (FIG. 2). An alternate form is a circular ramp (FIG. 3).

REFERENCES:
patent: 2258593 (1941-10-01), Back
patent: 2426884 (1947-09-01), Keeffer

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