skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Positron source position sensing detector and electronics

Abstract

A positron source, position sensing device, particularly with medical applications, in which positron induced gamma radiation is detected using a ring of stacked, individual scintillation crystals, a plurality of photodetectors, separated from the scintillation crystals by a light guide, and high resolution position interpolation electronics. Preferably the scintillation crystals are several times more numerous than the photodetectors with each crystal being responsible for a single scintillation event from a received gamma ray. The light guide will disperse the light emitted from gamma ray absorption over several photodetectors. Processing electronics for the output of the photodetectors resolves the location of the scintillation event to a fraction of the dimension of each photodetector. Because each positron absorption results in two 180.degree. oppositely traveling gamma rays, the detection of scintillation in pairs permits location of the positron source in a manner useful for diagnostic purposes. The processing electronics simultaneously responds to the outputs of the photodetectors to locate the scintillations to the source crystal. While it is preferable that the scintillation crystal include a plurality of stacked crystal elements, the resolving power of the processing electronics is also applicable to continuous crystal scintillators.

Inventors:
 [1];  [2];  [3];  [4];  [5]
  1. South Essex, MA
  2. (Winthrop, MA)
  3. Brockton, MA
  4. Newton Highlands, MA
  5. Cambridge, MA
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
865526
Patent Number(s):
4531058
Assignee:
Massachusetts General Hospital (Boston, MA)
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
positron; source; position; sensing; detector; electronics; device; particularly; medical; applications; induced; gamma; radiation; detected; stacked; individual; scintillation; crystals; plurality; photodetectors; separated; light; guide; resolution; interpolation; preferably; times; numerous; crystal; responsible; single; event; received; ray; disperse; emitted; absorption; processing; output; resolves; location; fraction; dimension; photodetector; results; 180; degree; oppositely; traveling; rays; detection; pairs; permits; manner; useful; diagnostic; purposes; simultaneously; responds; outputs; locate; scintillations; preferable; elements; resolving; power; applicable; continuous; scintillators; position sensing; processing electronics; scintillation crystals; medical applications; gamma rays; gamma ray; gamma radiation; sensing device; light guide; light emitted; sensing detector; resolution position; source position; positron source; scintillation crystal; diagnostic purposes; crystal elements; resolving power; /250/

Citation Formats

Burnham, Charles A, Bradshaw, Jr., John F., Kaufman, David E, Chesler, David A, and Brownell, Gordon L. Positron source position sensing detector and electronics. United States: N. p., 1985. Web.
Burnham, Charles A, Bradshaw, Jr., John F., Kaufman, David E, Chesler, David A, & Brownell, Gordon L. Positron source position sensing detector and electronics. United States.
Burnham, Charles A, Bradshaw, Jr., John F., Kaufman, David E, Chesler, David A, and Brownell, Gordon L. Tue . "Positron source position sensing detector and electronics". United States. https://www.osti.gov/servlets/purl/865526.
@article{osti_865526,
title = {Positron source position sensing detector and electronics},
author = {Burnham, Charles A and Bradshaw, Jr., John F. and Kaufman, David E and Chesler, David A and Brownell, Gordon L},
abstractNote = {A positron source, position sensing device, particularly with medical applications, in which positron induced gamma radiation is detected using a ring of stacked, individual scintillation crystals, a plurality of photodetectors, separated from the scintillation crystals by a light guide, and high resolution position interpolation electronics. Preferably the scintillation crystals are several times more numerous than the photodetectors with each crystal being responsible for a single scintillation event from a received gamma ray. The light guide will disperse the light emitted from gamma ray absorption over several photodetectors. Processing electronics for the output of the photodetectors resolves the location of the scintillation event to a fraction of the dimension of each photodetector. Because each positron absorption results in two 180.degree. oppositely traveling gamma rays, the detection of scintillation in pairs permits location of the positron source in a manner useful for diagnostic purposes. The processing electronics simultaneously responds to the outputs of the photodetectors to locate the scintillations to the source crystal. While it is preferable that the scintillation crystal include a plurality of stacked crystal elements, the resolving power of the processing electronics is also applicable to continuous crystal scintillators.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

Save / Share: