If a 12:1 ratio grid is used in a procedure that previously used no grid and 4 mAs, how much mAs should be used with the grid?

Question

Quizplus · Accepted Answer

The use of a grid in radiography increases the amount of mAs needed to maintain image quality due to the absorption of scatter radiation by the grid. The grid conversion factor (GCF) for a 12:1 grid is typically 5. To find the new mAs value, multiply the original mAs by the GCF: 4 mAs * 5 = 20 mAs.

If a 12:1 Ratio Grid Is Used in a Procedure