Radiant energy – Luminophor irradiation
Patent
1977-08-01
1979-12-18
Church, Craig E.
Radiant energy
Luminophor irradiation
250366, 250445T, G03B 4116
Patent
active
041791002
ABSTRACT:
Radiography apparatus including radiation generating means, collimator means interposed between the radiation generating means and an object to be exposed to radiation, scintillator means disposed on the opposite side of the object from the radiation generating means for converting the radiation to light, a self-scanning, integrated array of photodiodes for receiving light and emitting responsive electrical signals, optical coupling means connecting the scintillator means to the self-scanning, integrated photodiode array and signal receiving means for storing, processing or displaying the electrical signals. Additional collimators may be employed if desired.
In a nuclear isotope embodiment, collimator means are provided between the object and the scintillator means.
The self-scanning array of photodiodes has one or more integrated circuit elements, each having a plurality of photodiodes, a storage capacitor on which to integrate electric charges and a multiplex switch for periodic readout by means of an integrated shift register scanning circuit.
REFERENCES:
patent: 3833810 (1958-05-01), Efanov
patent: 3837657 (1958-06-01), Craig
patent: 3860821 (1975-01-01), Barrett
patent: 3881110 (1975-04-01), Hounsfield
patent: 3927318 (1975-12-01), Macovski
patent: 4031395 (1977-06-01), Le May
patent: 4045672 (1977-08-01), Watanabe
patent: 4051379 (1977-09-01), Zacher
"Self Scanning Photodiode Arrays for Spectroscopy", Snow, Research-Development, Apr. 1976, pp. 18-22.
Sashin Donald
Sternglass Ernest J.
Church Craig E.
Silverman Arnold B.
University of Pittsburgh
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