Which parameters are typically included in routine QA tests for X-ray equipment?

• A. Filtration type and patient weight.
• B. Calibration of kVp, timer, mA, exposure reproducibility.
• C. Table height and bucky speed.
• D. Image compression and file format.

Answer: (B)

Routine QA tests focus on ensuring the radiographic exposure is accurate and reproducible. The most essential parameters checked are the calibration of kVp (beam quality), the timer (exposure duration), and the tube current expressed as mA (and thus mA×time, the exposure). Verifying these ensures the image brightness and patient dose match the intended technique, and that repeated exposures under the same settings produce consistent results. Exposure reproducibility specifically confirms that identical technique settings yield the same output across trials, which is critical for reliable diagnosis and dose management.

Filtration type and patient weight aren’t typically the primary parameters in routine QA because, while beam quality and patient factors influence dose and contrast, they’re not the standard machine-parameter checks used to verify consistent exposure. Table height and bucky speed relate more to positioning and mechanical operation than to verifying the accuracy and consistency of exposure factors. Image compression and file format pertain to digital image handling rather than the actual X-ray exposure.