Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1991-01-23
1992-08-11
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
25036302, 25037006, 25037009, 378156, G01T 116
Patent
active
051381672
ABSTRACT:
An energy discriminating apparatus and method is disclosed for use in connection with digital radiography and fluoroscopy. In use of the detection system and method an x-ray source is actuated to direct x-rays through a patient's body, the x-rays including both higher and lower energy radiation. A first detector element, including a plurality of segments, is positioned opposite the source to receive and respond predominantly to x-rays in a lower energy range, the remaining x-rays, being generally of higher energy, passing through the first detector element. A second detector element, also including a plurality of segments, each segment including a phosphor coating layer and a sensor, is positioned to receive and respond to the higher energy radiation passing through the first element. The sensors are coupled respectively to each detector element segment for substantially simultaneously sensing the response and spatial location, relative to the detector elements, of radiation to which each detector element respectively responds. A filter element is interposed between the first and second detectors to enhance discrimination in the energy response of the respective detector elements. Particular preferred detector phosphor materials are identified. The sensors produce separately and simultaneously information representing patterns of relatively lower and higher energy emergent from the patient's body. Digital data processing and conversion equipment responds to the sensors to produce digital information representing each of said images, which can be digitally processed to enhance image characteristics. Rare earth tantalates and semiconductor materials can also be used as radiation detection layers.
REFERENCES:
patent: 3699340 (1972-10-01), Hick et al.
patent: 4047037 (1977-09-01), Schlosser et al.
patent: 4055765 (1977-10-01), Gerber et al.
patent: 4055766 (1977-10-01), Miller et al.
patent: 4511799 (1985-04-01), Bjorkholm
patent: 4618773 (1986-10-01), Drukier
patent: 4626688 (1986-12-01), Barnes
patent: 4639599 (1987-01-01), Ichihara
L. H. Brixner and H.-y. Chen, "On the Structural and Luminescent Properties of the M'LnTaO.sub.4 Rare Earth Tantalates." Journal of the Electrochemical Society, vol. 130, No. 12 (Dec. 1983) pp. 2435-2443.
L Brixner, R. S. Holland, R. E. Kellogg, D. Mickish, S. H. Putten and W. Zegarski, "Low Print-Through Technology With Rare Earth Tantalate Phosphors." 7 pages.
Patents Abstracts of Japan, vol. 9, No. 68 (P-344)[1791], Mar. 28, 1985; & JP-A-59 200 983 (Toshiba K.K.) 14-11-1984.
Hannaher Constantine
University of Alabama - Birmingham
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