Barium studies should be scheduled last in a sequence to avoid which issue?

• A. Residual contamination affecting following exams
• B. Increased radiation dose
• C. Patient discomfort
• D. Longer setup time

Answer: (A)

Barium studies introduce a contrast that can cling to surfaces and equipment. If this exam is done earlier in the sequence, barium residue can contaminate the table, pillows, towels, and imaging gear, potentially affecting the next patient’s study or requiring extra cleaning time and downtime. Placing it last minimizes the risk of cross-contamination and helps ensure subsequent exams aren’t compromised by lingering residue. The other factors—radiation dose, patient discomfort, and setup time—aren’t inherently driven by the order of this exam and aren’t the main reason for scheduling it last.