Fig. 1From: Abstracts of the Total Body PET 2022 conferenceDaily LYSO background count-rate measured over three years, where dotted vertical lines indicate dates of calibration. Background count-rates increase over time due to energy histogram drift and then shift back to baseline after energy calibration. Several anomalous high or low count-rate occurrences are measured, possibly due to detector temperature changes or count-rate measurement in presence of a radioactive source.Back to article page