System for density correction of medical imaging film hard copy

Details System for density correction of medical imaging film hard copy System for density correction of medical imaging film hard copy

1986-12-09

1988-07-12

Mathews, A. A.

Photocopying

Contact printing

Light boxes

354298, 355 27, 355 68, 346110R, 358244, G03B 2772, G03B 308

Patent

active

047573341

ABSTRACT:
A film imaging and processing system having a light beam for writing an image on film and a chemical processor for developing the film. Film density is photoelectrically monitored immediately upon completion of the chemical development to provide a signal for varying the subsequent translation of image data to writing intensity or duration of the beam. The monitoring is effected by first writing a calibration strip of film densities along the edge of the film and separate from the image thereon, corresponding to a predetermined standard, and thereafter comparing the written and subsequently developed calibration strip with the predetermined standard.

REFERENCES:
patent: 1895760 (1933-01-01), Hunt
patent: 3500734 (1970-03-01), Lewis et al.
patent: 3557675 (1971-01-01), Koll
patent: 3636851 (1972-01-01), Furst
patent: 4278347 (1981-07-01), Okamoto et al.
patent: 4293211 (1981-10-01), Kaufmann
patent: 4486082 (1984-12-01), Wagner et al.

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