Method for determining the function representing the effect of n

Details Method for determining the function representing the effect of n Method for determining the function representing the effect of n

1991-07-05

1994-09-13

Dzierzynski, Paul M.

X-ray or gamma ray systems or devices

Specific application

Absorption

378 97, 2502085, 250214P, 2502521, G01N 2304

Patent

active

053475631

ABSTRACT:
The invention relates to radiology systems and, more particularly in such systems, to a method that enables the effect of non-reciprocity of the radiographic film to be determined. This effect of non-reciprocity is expressed by coefficients CNRD(d.sub.i) which are a function of the photon dose rate (d.sub.i) on the film, the coefficients CNRD(d.sub.i) being obtained from the coefficients CNRT(t.sub.i) and the determination of the reference lumination L.sub.ref received by the film.

REFERENCES:
patent: 2189623 (1940-02-01), Bourland
patent: 2985761 (1961-05-01), Ohmart
patent: 4593371 (1986-06-01), Grajewski
patent: 4748648 (1988-05-01), Boucle et al.

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