Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1980-12-29
1983-11-01
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250366, 250369, G01T 120
Patent
active
044131836
ABSTRACT:
A gamma camera having an array of photodetectors arranged to locate a flash of light produced by a scintillator in response to an incident gamma ray photon. A current pulse is produced by each one of the photodetectors in response to each incident gamma ray photon, the amount of charge produced by each one of such photodetectors being a measure of the portion of the energy of the photon detected by such one of the photodetectors. Each integrator produces a voltage which rises from an initial reference level, typically ground potential, to a peak level, such peak voltage level being representative of the amount of charge in the current pulse and hence the peak level of such voltage is a measure of the portion of the energy of the photon detected by such one of the photodetector. The outputs of the integrators are combined to provide X and Y coordinate location signals. The output of the integrator is reset to the initial reference level a predetermined time after the production of the current pulse, such predetermined time corresponding to the time the integrator output is substantially at its peak voltage and has provided a measure of the portion of the energy level of the photon detected by such one of the photodetectors coupled thereto thereby enabling such integrator to properly respond to a current pulse produced by the photodetector in response to succeeding incident gamma ray photon.
REFERENCES:
patent: 3914611 (1975-10-01), Stout
patent: 4186307 (1980-01-01), Tanaka et al.
Berluti, Jr. Vincent
Metal Israel
Fields Carolyn E.
Pannone Joseph D.
Raytheon Company
Sharkansky Richard M.
Smith Alfred E.
LandOfFree
Gamma camera does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gamma camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma camera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2170146