Method and circuit for stabilizing conversion gain of radiation detectors of a radiation detection system

Patent · Tue Apr 15 00:00:00 EST 1986

OSTI ID:5596079

Stoub, E W

A method is described for calibrating the gain of an array of radiation detectors of a radiation detection system comprising the steps of: (a) measuring in parallel for each radiation detector using a predetermined calibration point the energy map status, thereby obtaining an energy response vector whose elements correspond to the individual output of each radiation detector, each predetermined calibration point being a prescribed location corresponding to one of the radiation detectors; (b) multiplying that energy response vector with a predetermined deconvolution matrix, the deconvolution matrix being the inversion of a contribution matrix containing matrix elements C/sub IJ/, each such matrix element C/sub IJ/ of the contribution matrix representing the relative contribution level of a radiation detector j of the detection system for a point radiation source placed at a location i, thereby obtaining a gain vector product for the radiation detectors; (c) adjusting the gains of the radiation detectors with respect to the gain vector product such that a unity gain vector is essentially obtained; (d) measuring again the energy map status according to step (a); and (e) if the energy map status fails to essentially produce a unity gain vector repeat steps (a) to (d) until the energy map status substantially corresponds to unity.

• Assignee: Siemens Gammasonics, Inc., Des Plaines, IL
• Patent Number(s): US 4583187
• Application Number: TRN: 86-019045
• OSTI ID: 5596079
• Resource Relation: Patent File Date: Filed date 02 Feb 1983
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
RADIATION DETECTORS
CALIBRATION
GAIN
ELECTRONIC CIRCUITS
MATRICES
RADIATION SOURCES
STABILIZATION
VECTORS
AMPLIFICATION
MEASURING INSTRUMENTS
TENSORS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments