Particles emitted from radioactively labeled samples in gel pass through film and strike intensifying screen
Inorganic phosphors absorb energy, converting it to ultraviolet or blue light, which then exposes the film
For use with isotopes that emit high-energy beta particles (e.g., 3 2 P, 4 5 Ca) or gamma particles (e.g., 1 2 5 I) Fit autoradiography cassettes for common film sizes