A radiation film badge is used to

• A. Monitor the radiation exposure to the wearer
• B. Increase image resolution
• C. Shield the patient
• D. Calibrate the machine

Answer: (A)

The key idea is tracking how much ionizing radiation the person wearing the badge has received. A radiation film badge serves as a simple dosimeter: the photographic film inside darkens in proportion to the beam exposure, and after processing, the accumulated dose is read. This allows labs and clinics to ensure that a radiographer’s exposure stays within safety limits and to apply the ALARA principle for ongoing protection. The badge itself doesn’t change or improve an image, so it won’t increase image resolution. It also isn’t used to shield the patient, since shielding is done with protective aprons or shields, and it isn’t used to calibrate the X-ray machine, which relies on dedicated calibration equipment and QC procedures. So its purpose is specifically to monitor the wearer’s radiation exposure.