Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1985-05-30
1987-03-24
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250369, 364414, 382 44, G01T 117, G06K 936
Patent
active
046527605
ABSTRACT:
A data collector for use with a scintillation camera or the like where the camera includes (a) a radiation detector which generates X and Y position signals at least each time a detection event occurs (b) an A/D converter respectively converting the X and Y position signals to digital signals, (c) a converter responsive to the X and Y position signals for respectively converting the position signals to X and Y address signals in accordance with at least a predetermined ratio, (d) X and Y address registers for respectively receiving the X and Y address signals, and (e) a two-dimensional image storage memory responsive to the X and Y address signals for storing data corresponding to the detected event at a memory location within the image storage memory determined by the X and Y address signals. The converter comprises at least one memory matrix responsive to one of the A/D converters for storing conversion data where the memory matrix comprises at least 2.sup.n storage locations where each location is at least n bits long and where the output of the A/D converter is at least n bits long, the magnitude of the output of the A/D converter being used as an address to access the conversion data stored at that address and apply the accessed conversion data as the address signal to the address register associated with the A/D converter.
REFERENCES:
patent: 3976982 (1976-08-01), Eiselen
patent: 4267573 (1981-05-01), Chaikin et al.
patent: 4533947 (1985-08-01), Smith
Sebastian Genna, Sing-Chin Pang, Andrew Smith, "Digital Scintigraphy: Principles, Design and Performance", Journal of Nuclear Medicine, vol. 22 (1981), pp. 365-371.
Robert L. Richardson, F. Deaver Thomas, "An Adjustable Zoom-Mode Gain Control for Computerized Gamma-Camera Systems", Journal of Nuclear Medicine, vol. 21 (1980), pp. 790-792.
Kondo Shoji
Taniguchi Tadashi
Ferguson Jr. Gerald J.
Hannaher Constantine
Hoffman Michael P.
Howell Janice A.
Malamud Ronni S.
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