CAMRT Radiography Practice Exam

What is an example of a safety feature in fluoroscopy systems?

1. Automatic collimation

2. Max 10 mGy/min exposure

3. Minimum of 4 mA

4. 30-minute cumulative timer

The correct answer is: Automatic collimation

Automatic collimation is a significant safety feature in fluoroscopy systems because it ensures that the x-ray beam is confined to the area of interest. This minimizes unnecessary radiation exposure to adjacent tissues and organs, ultimately protecting the patient from excess radiation. By automatically adjusting the collimation to the size of the anatomical region being examined, this feature enhances the quality of the fluoroscopic image while promoting radiation safety. While other choices relate to aspects of radiation safety or operational limits within fluoroscopy systems, they do not address the aspect of beam limitation directly related to patient protection. The maximum exposure limit, minimum current, and timer settings play roles in radiation management and operational safety but do not specifically relate to the immediate reduction of beam size to prevent unnecessary exposure.