Final answer:
A survey of ambient radiation exposure rate must be performed in a nuclear medicine department on a regular basis to ensure the safety of patients and staff.
Step-by-step explanation:
A survey of ambient radiation exposure rate must be performed in a nuclear medicine department on a regular basis to ensure the safety of patients and staff. The frequency of these surveys depends on the specific regulations and guidelines of the country and institution.
In the United States, for example, the Nuclear Regulatory Commission (NRC) requires that surveys be done at least every six months. These surveys involve measuring radiation levels in various areas of the nuclear medicine department, including waiting rooms, examination rooms, and treatment rooms.
By regularly monitoring the ambient radiation exposure rate, the nuclear medicine department can assess the effectiveness of their safety measures and make any necessary adjustments to ensure that radiation levels are kept within acceptable limits.