Absorbed doses reduced by the use of rare-earth intensifying screens in rotational panoramic radiography with constant potential generator

Absorbed doses modified by the use of rare-earth intensifying screens were measured with rotational panoramic radiography. Equipments with the constant potential, Veraview (J.Morita) and PM 2002 CC (Planmeca) was utilized. The optimum exposure settings at each tube voltage were determined by radiography of a Rando® phantom. Absorbed doses to parotid and thyroid glands were measured under the optimum exposure settings by using the Rando® phantom and thermoluminescence dosimeters.