Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1993-10-26
1995-01-03
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250369, G01T 116, G01T 117, G01T 1172
Patent
active
053788931
ABSTRACT:
A PET scanner contains a positron emission event qualifier which prevents noise from being misinterpreted as such an event. A radiation detector signal indicates the intensity and duration of sensed gamma radiation. A comparator produces an intermediate signal when the radiation detector signal exceeds a predetermined threshold. A delay line delays the intermediate signal by an interval of time and blocks any pulses in the intermediate signal which are shorter than this interval. Typical noise in the intermediate signal is shorter in duration than this interval of time.
REFERENCES:
patent: 4284890 (1981-08-01), Thompson
patent: 4394576 (1983-07-01), Tanaka et al.
patent: 4403149 (1983-09-01), Govaert
patent: 4415807 (1983-11-01), Friauf et al.
patent: 4736097 (1988-04-01), Philipp
patent: 5032728 (1991-07-01), Chang et al.
Ter-Pogossian, "Positron Emission Reconstruction Tomography for the Assessment of Regional Myocardial Metabolism by the Administration of Substrates Labeled with Cyclotron Produced Radionuclides", Conference: Cardiovascular Image Processing, Theory and Practice, Stanford, Calif., 1975, pp. 277-282.
Wong et al., "Characteristics of Small Barium Fluoride Scintillator for High Intrinsic Resolution Time of Flight Positron Emission Tomography" IEEE Transactions on Nucl. Sci., vol. NS-31, No. 1, 1984, pp. 381-386.
Yamamoto et al., "A BGD Detector Using a New Encoding Scheme for a High Resolution Positron Emission Tomography", Nuc. Inst. & Meth., A248, 1986, pp. 557-561.
Paper by D. A. Gedcke and W. J. McDonald entitled "A Constant Fraction of Pulse Height Trigger for Optimum Time Resolution," Nuclear Instruments and Methods, 1967.
Paper by David M. Binkley and Michael Casey entitled "Performance of Fast Monolithic ECL Voltage Comparators in Constant-Fraction Discriminators and Other Timing Circuits," 1988.
Murray Jonathan A.
Williams John J.
General Electric Company
Glick Edward J.
Hannaher Constantine
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