Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product
Patent
1988-06-20
1989-09-12
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
430567, 430495, 2504861, G03C 192, G03C 178
Patent
active
048659444
ABSTRACT:
A unitary intensifying screen and radiographic element are disclosed comprised of adjacently coated silver halide emulsion and X radiation absorbing fluorescent layers. The fluorescent layer (a) is capable of attenuating at least 5 percent of a reference X radiation exposure produced by a Mo target tube operated at 28 kVp with a three phase power supply, wherein the reference X radiation exposure passes through 0.03 mm of Mo and 4.5 cm of poly(methyl methacrylate) to reach the fluorescent layer mounted 25 cm from a Mo anode of the target tube and attenuation is measured 50 cm beyond the fluorescent layer, (b) contains a phosphor which exhibits a conversion efficiency at least equal to that of calcium tungstate, (c) exhibits modulation transfer factors greater than those of reference curve A in FIG. 3, and (d) exhibits an optical density of less than 1.0. The emulsion and fluorescent layers are contiguously coated or optically coupled through a transmission medium transparent to latent image forming radiation and having a refractive index of at least 1.33, and the silver halide emulsion layer contains an agent for promoting the oxidation of silver atoms to silver ions to offset the effects of background radiation.
REFERENCES:
patent: 4710637 (1987-12-01), Luckey et al.
Research Disclosure (Aug. 1979), Radiographic Films/Materials No. 18H (Class 430, Subclass 567).
Brady Robert V.
Buntaine James R.
Moore William E.
Roberts Luther C.
Chea Thor L.
Eastman Kodak Company
Michl Paul R.
Thomas Carl O.
LandOfFree
Unitary intensifying screen and radiographic element does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Unitary intensifying screen and radiographic element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unitary intensifying screen and radiographic element will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-915536