As a Radiologic Technologist, you come in contact with various types of patients. Patients that are sick, nervous and at times energetic like children can be. The interviewer is asking this question to rate your communication skills.

"Before performing a CT scan on children I've found it helpful to bring them into the room and show them around before the scan. Explaining how the machine moves around them, allowing them to test out the table where they will lay and showing them where their parents will wait until it is finished."