Radiographic screen/film assemblies with improved detection quan

Details Radiographic screen/film assemblies with improved detection quan Radiographic screen/film assemblies with improved detection quan

1989-12-26

1991-06-04

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Structurally defined

430502, 430966, 430403, G03C 146

Patent

active

050213270

ABSTRACT:
Assemblies of double coated radiographic elements exhibiting sharply curtailed crossover and front and back intensifying screen pairs are disclosed. By choosing a front screen that exceeds a stated sharpness criterion, expressed in terms of modulation transfer factors (MTF), and a back screen and adjacent emulsion layer unit combination exhibiting a photicity at least twice that of the combination of the front screen and its adjacent emulsion layer unit an enhancement in detective quantum efficiency (DQE) is realized.

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patent: 4500631 (1985-02-01), Sakamoto et al.
patent: 4639411 (1987-01-01), Daubendiet et al.
patent: 4707435 (1987-11-01), Lyons et al.
patent: 4710637 (1987-12-01), Luckey et al.
patent: 4803150 (1989-02-01), Dickerson et al.
K. Rossman & G. Sanderson, "Validity of the Modulation Transfer Function of Radiographic Screen-Film Systems Measured by the Slit Method", Phys. Med. Biol., 1968, vol. 13, No. 2, pp. 259-268.
Research Disclosure, vol. 184, Aug. 1979, Item 18431, Section V, Cross-Over Exposure Control.

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