Final answer:
The optimum source-to-skin distance for stationary fluoroscopic equipment is around 38 to 41 cm, while for mobile fluoroscopy equipment, it is 30 cm.
Step-by-step explanation:
The optimum source-to-skin distance for stationary fluoroscopic equipment is typically 38 to 41 cm (15 to 16 inches), while for mobile fluoroscopy equipment, the recommended source-to-skin distance is 30 cm (12 inches). These distances are established to ensure that patients receive the lowest dose of radiation necessary to achieve the required image quality. The greater distance in stationary equipment allows for better image quality and less patient radiation exposure compared to mobile units where space constraints may exist.