For annual Gy/mAs testing, which statements are true?

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

Answer: (D)

Annual Gy/mAs testing confirms that the beam output behaves predictably as you change mAs, stays consistent across repeated exposures, and that the timer accurately controls exposure duration. The first part, linearity, means that with fixed kVp and geometry, the exposure output should scale proportionally with mAs—doubling mAs should roughly double the air kerma, and the data should line up on a straight line within tolerance. The second part, reproducibility, checks that repeating exposures at the same settings yields essentially the same output each time, so differences stay within the allowed range. The third part, timer accuracy, ensures the exposure time is correct so the resulting mAs matches what you set; if the timer is off, the dose will be too high or too low. When all three aspects are addressed, the test provides a complete check of Gy/mAs performance, which is why including all three is appropriate.