QC parameters that should be tested annually include:

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

Answer: (A)

Annual QC focuses on long-term, system-wide performance that can drift over time and affect both dose and image quality. The three parameters referred to are typically those that govern the accuracy and consistency of the X-ray output and beam quality, such as beam quality control (kVp accuracy), exposure timing (timer accuracy), and exposure reproducibility/consistency. Verifying all of these together once a year ensures the entire exposure chain remains true to the set factors and that patient dose stays within limits while image quality is reliable.

If any one of these critical aspects were left out, you could miss a gradual change that alters dose delivery or image brightness in a way that isn’t caught by more frequent checks. Daily or monthly checks catch obvious problems, but the annual test validates that there hasn’t been drift across the year in these core performance areas. Therefore, the option including all three is the most complete and appropriate for annual QC.