What is the optimum source-to-skin distance for stationary fluoroscopic equipment?

The optimum source-to-skin distance (SSD) for stationary fluoroscopic equipment is established to minimize patient exposure to radiation, while still ensuring adequate image quality and diagnostic capability. The recommended distance of 45 cm is significant as it reduces the radiation dose the patient receives during the procedure.

At a greater SSD, the intensity of radiation decreases following the inverse square law, meaning the exposure rate drops significantly as the distance from the source increases. This principle is critical in fluoroscopy, particularly since the procedure often involves longer examination times and can result in cumulative dose effects.

Choosing the correct SSD is crucial for maintaining safety standards in medical imaging. The established guidelines typically advocate for a minimum of 30 cm, but 45 cm is generally preferred for stationary fluoroscopic equipment as it provides an optimal balance between safety and imaging efficacy, aligning with best practices in radiological safety. This ensures that patients receive the lowest possible dose while still achieving the necessary diagnostic outcomes.