Method and circuit for stabilizing conversion gain of radiation detectors of a radiation detection system
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
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Related Subjects
RADIATION DETECTORS
CALIBRATION
GAIN
ELECTRONIC CIRCUITS
MATRICES
RADIATION SOURCES
STABILIZATION
VECTORS
AMPLIFICATION
MEASURING INSTRUMENTS
TENSORS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments