Annals of Clinical and Laboratory Science, Vol 7, Issue 1, 57-67
Copyright © 1977 by Association of Clinical Scientists
Quality control of gamma counters. I. Experimental evaluation of sources of error
MM Lubran
Errors of counting rate as large as 2 percent may occur through variations in instrumental parameters during the measurement of I-125 activity using a gamma counter. Much larger errors result from failure to maintain constant sample geometry; in particular, the slope of calibration curves depends on sample volume.