Which QC parameters should be tested annually?

• A. 1 and 2
• B. 2 and 3
• C. 1 and 3
• D. 1, 2, and 3

Answer: (B)

In QC, some checks are done daily or weekly to catch immediate issues, while others are reserved for annual verification to confirm the system’s long‑term stability. The two tests that should be performed yearly are the ones that assess long‑term performance: how consistently the system delivers exposures over time and how well the image quality parameters hold up across a period of use. These annual checks look for drift in output, detector or imaging-chain response, or processing that routine frequent checks might miss. The remaining parameter is typically addressed with more frequent QC to ensure the system stays ready for day‑to‑day operation. Therefore, the combination that includes the two long‑term stability tests is the appropriate annual set.