To detect the weak energy of the 3 H signal, TR screens are constructed without the protective cellulose acetate overlay. The maximum energy range of 3 H is 5 microns and that signal can be further attenuated by a thick sample or sample media. A sample prepared with a fluorographic reagent is not recommended. Screen styles Two types of screen configurations are available. Mounted screens are permanently fixed to an aluminum backing plate, and they require a specially designed Molecular Dynamics exposure cassette.
Unmounted screens have no additional backing and can be used with a standard exposure cassette.
Storm and Typhoon systems, with their lid pressing mechanism, can use mounted or unmounted screens. The remaining signal must be erased before the storage phosphor screen is reused. As shown by the stimulation spectrum, the most efficient wavelengths of erasing light are between 475 and 650 nm. To prevent contamination, radioactive samples are covered prior to their exposure to the storage phosphor screens. There are a variety of materials used for this purpose.