How frequently should spatial linearity be tested for a gamma camera?

Spatial linearity refers to how accurately the gamma camera can represent the position of detected gamma rays in the image space. It is crucial for ensuring that the images produced are geometrically accurate, which directly affects the interpretation of diagnostic information in nuclear medicine.

Testing spatial linearity weekly strikes a balance between the need for consistent quality assurance and practical considerations. Conducting this test on a weekly basis allows for the timely identification of any discrepancies or degradation in the camera's performance. If spatial linearity were only tested monthly or yearly, there could be a significant risk of undetected errors that could compromise patient care and the reliability of imaging results.

While daily testing may seem like an option for ensuring the highest quality, it is often excessive for most practices where equipment stability is reliable. Therefore, weekly testing is an accepted standard that allows for ongoing monitoring while avoiding unnecessary disruptions to routine operations. This frequency aligns with guidelines provided by various quality control protocols in nuclear medicine.