The term commonly used to refer to intensifying screens that contain one or more of the rare earth elements and utilize their absorption and conversion properties in x-ray imaging is “Rare Earth Screens.” These screens are part of a screen-film system used for x-ray imaging and are considered “fast” exposure systems. They enhance the efficiency of capturing and converting x-ray radiation into visible light, which in turn exposes the film more rapidly, reducing the exposure time required for imaging. This results in faster and more efficient x-ray examinations.