If a Tabletop Exposure (No Grid) of a Humerus Requires

question 39

Multiple Choice

If a tabletop exposure (no grid) of a humerus requires 2.5 mAs, how much mAs is needed if a 12:1 ratio grid is added?

• A) 0.21 mAs.
• B) 0.5 mAs.
• C) 12.5 mAs.
• D) 30 mAs.