Final answer:
Fluoroscopic exposures are allowed only when the fluoroscopic x-ray tube and image intensifier are locked in place and centered, ensuring accurate and safe imaging, while reducing radiation exposure through proper shielding and practices.
Step-by-step explanation:
The image intensifier in fluoroscopy is an essential component that amplifies the x-ray images for viewing. For safe and effective use during fluoroscopic procedures, it is crucial that the fluoroscopic x-ray tube and image intensifier are locked in place and centered. This ensures that the x-ray beam is accurately directed at the area of interest and minimizes radiation exposure to the surrounding tissues. Shielding, such as lead aprons, is used to protect patients and technicians by absorbing radiation. Additionally, limiting exposure time with fast films, increasing the distance from the source, and using appropriate shielding contribute to reducing radiation doses from medical diagnostics.