Considering radiation protection principles, which practice should be prioritized to minimize the radiation dose to the patient during fluoroscopic examinations?

• A. Increase the fluoroscopy time to improve visualization.
• B. Use continuous fluoroscopy at a high frame rate.
• C. Maximize radiographic exposure per frame to reduce procedure length.
• D. Limit the fluoroscopy time to the minimum necessary.

Answer: (D)

During fluoroscopy, the patient’s radiation dose accumulates with the time the beam is on. The most effective way to minimize dose is to keep the fluoroscopy time to the minimum necessary for completing the task, preserving image quality while avoiding unnecessary exposure.

Using the beam continuously at a high frame rate or increasing the exposure per frame would deliver more radiation without necessarily providing proportional diagnostic benefit, so they’re not the best ways to reduce dose. Limiting the fluoroscopy time directly lowers the total dose, and you can further reduce exposure by employing dose-saving techniques such as pulsed fluoroscopy, collimation to limit the irradiated field, last-image hold, and avoiding unnecessary acquisitions.