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Application of the library least‐squares analysis to whole‐body counter spectra derived from an array of detectors
Author(s) -
Wielopolski L.,
Cohn S. H.
Publication year - 1984
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595522
Subject(s) - detector , spectral line , physics , least squares function approximation , computational physics , optics , mathematics , statistics , astronomy , estimator
The library least‐squares method was applied to the analysis of gamma‐ray spectra obtained from an array of 54 NaI(Tl) detectors in a whole‐body counter. The analysis of spectra which were obtained over a period of 8 yr demonstrates the applicability of the method despite inherent variations encountered in large counting systems. The elements of interest analyzed were total‐body K, Ca, Na, Cl, and P. Least‐squares fits obtained with library standards derived from distributed sources were better than those obtained from library standards derived from localized sources.