An image demonstrating motion and adequate density was obtained using 100 mA at 0.5 seconds. If the time is changed to 0.25 seconds, what mA should be used to maintain density?
A) 100 mA
B) 200 mA
C) 300 mA
D) 400 mA

Question

Quizplus · Accepted Answer

To maintain the same density, the mAs must remain constant. We know that the original image was obtained using 100 mA at 0.5 seconds, which gives a mAs value of 50 mAs (100 mA x 0.5 s). If we want to reduce the exposure time to 0.25 seconds, we need to double the mA to maintain the same mAs value. Therefore, the new mA should be 200 mA (50 mAs / 0.25 s = 200 mA).

An Image Demonstrating Motion and Adequate Density Was Obtained Using