Which strategy best reduces radiation exposure in the cath lab?

• A. Increase frame rate to maximum
• B. Stand closer to the radiation source
• C. Avoid using shielding
• D. Minimize fluoroscopy time

Answer: (D)

Reducing radiation exposure hinges on shortening the time the X-ray beam is actively used. The dose accumulates with how long fluoroscopy is on, so the most effective single step is to minimize fluoroscopy time. In practice, plan the procedure to image only when necessary, use non-radiation guidance when possible, and employ techniques that lower exposure per second—pulsed fluoroscopy, last-image hold, and tight collimation help achieve that. Increasing the frame rate raises the dose per second, so turning the frame rate up would increase exposure instead of reduce it. Standing closer to the source increases exposure via the inverse-square law, and shielding should be used to protect yourself and staff. Prioritizing shorter fluoroscopy use delivers the greatest overall reduction in radiation exposure.