If 40 mAs produce a diagnostic image when a 12:1 ratio grid is used, how much mAs should be used with a 5:1 ratio grid?

Question

Quizplus · Accepted Answer

The mAs required changes with the grid ratio because grids are used to reduce scatter radiation, which affects image quality. The formula to adjust mAs when changing grids is: mAs1/mAs2 = GCF1/GCF2, where GCF stands for Grid Conversion Factor. The GCF for a 12:1 grid is approximately 5, and for a 5:1 grid, it's about 2. Using the formula: 40mAs/ mAs2 = 5/2, solving for mAs2 gives 16 mAs.

If 40 MAs Produce a Diagnostic Image When a 12:1