Question

a radiograph acquired at 60 kilovoltage peak (kvp) results in an underexposed image. what new kvp setting will double the receptor exposure? 51 kilovoltage peak (kvp) 57 kilovoltage peak (kvp) 63 kilovoltage peak (kvp) 69 kilovoltage peak (kvp)

Explanation:

Step1: Recall the 15% rule

The 15% rule states that changing the kVp by 15% will approximately double or halve the receptor exposure.

Step2: Calculate 15% of 60 kVp

$60\times0.15 = 9$

Step3: Determine the new kVp to double exposure

To double the receptor - exposure, we increase the kVp. So, $60 + 9=69$ kVp

Answer:

69 kilovoltage peak (kVp)