Introduction
After more than 20 years of performing interventional cardiology, I followed standard radiation protection protocols—including lead aprons, table skirts, ceiling shields, and horizontal scatter radiation pads—assuming they were sufficient. They were not.
Scatter radiation is most intense where the x-ray beam enters the patient, dispersing as secondary energy. A significant vulnerability exists in the vertical exposure “gap” created between the patient’s upper torso and the bottom edge of the fixed ceiling shield, or between the patient and the image intensifier when ceiling shielding is not deployed. These gaps shift and open continuously with table movement, camera angulation, and varying body shapes, making it nearly impossible to eliminate them with a fixed shield alone.