CAMRT Radiography Practice Exam

In a diagnostic imaging department, the largest occupational radiation dose is primarily associated with which two modalities?

1. MRI and CT scans

2. Ultrasound and X-ray

3. Mobiles and fluoroscopy

4. Radiation therapy and nuclear imaging

The correct answer is: Mobiles and fluoroscopy

The correct choice is related to mobile radiography and fluoroscopy, as these modalities have been identified as contributing significantly to occupational radiation exposure for healthcare providers. In mobile radiography, the use of portable x-ray machines in various settings—such as patient rooms or emergency departments—can pose an increased risk of radiation exposure for the operator and surrounding staff. This is often due to the close proximity needed to capture quality images and the potential for scattered radiation within confined spaces. Fluoroscopy, which provides real-time imaging during various procedures, also contributes to higher radiation doses. The continuous exposure during fluoroscopic procedures requires operators to remain close to the source of radiation for extended periods, increasing their radiation dose compared to static imaging techniques. Additionally, the use of fluoroscopy often involves multiple image acquisitions, which can lead to cumulative exposure. These two modalities, mobile radiography and fluoroscopy, are frequently cited in studies focused on occupational exposure, making them crucial areas of concern in radiation safety protocols within diagnostic imaging departments.