ABD region repeats represent what percentage of all repeats?

• A. 25%
• B. 40%
• C. 60%
• D. 75%

Answer: (B)

The question tests understanding how repeats are distributed across imaging regions. If ABD region repeats account for roughly two-fifths of all repeats, that means about two out of every five repeated images come from abdomen imaging. This reflects the particular challenges of abdomen studies—motion from breathing, variable inspiration, and positioning issues—that often necessitate a repeat. The rest of the repeats come from other regions, so the abdomen isn’t the only source but is a major one. The other percentage choices would either understate or overstate abdomen-related repeats compared with typical QA data, which is why the two-fifths figure best fits the scenario.