Calculate the exposure time when an x-ray control panel is set at 200 mA and 15 mA.

Answer and Explanation:

Exposure time in an X-ray can be Calculated as the difference of the two set levels.

Therefore to calculate the exposure time:

The difference of the two current levels is equal to exposure time

(200mA - 15mA) = 185 mA

Exposure time = 185 mA

(There is a direct relationship between mA and time. Thus, a higher mA setting corresponds to a reduction in required exposure time).