When changing your SID from 72" to 56"
A)decrease your kVp by 15%.
B)decrease your mAs by 50%.
C)increase the mAs by a factor of 4.
D)all of the above

Question

Quizplus · Accepted Answer

When changing the SID from 72" to 56", the intensity of the x-ray beam at the patient will increase. To account for this, the mAs should be decreased by 50% to maintain the same patient dose. There is no need to adjust the kVp with this change in SID. Increasing the mAs by a factor of 4 or decreasing the kVp by 15% would not be appropriate adjustments in this situation.

When Changing Your SID from 72" to 56