What is the minimum frequency for performing detector efficiency normalization scans in PET?

Detector efficiency normalization scans are crucial in Positron Emission Tomography (PET) to ensure that the detectors are functioning optimally and providing accurate imaging results. The minimum frequency for performing these scans is quarterly. This recommendation is based on the need to monitor and correct any changes in the detector response that might occur over time due to factors such as equipment aging, environmental conditions, or variations in the detection system.

Performing these scans quarterly allows for sufficient oversight to identify any emerging issues while not imposing an excessive burden on the clinical workflow. Other frequencies, such as daily or weekly, may lead to unnecessary resource use and downtime, while annual scans might not provide timely enough data to catch and address problems before they impact patient care or the quality of imaging results. Thus, quarterly strikes a balance between monitoring performance adequately and maintaining operational efficiency.