The radiation is used in a wide range of medical fields, in diagnosis and treatment. Certain body parts, like thyroid, are more specifically affected by exposure to different types of radiation sources. The thyroid is highly susceptible to radiation carcinogenesis and exposure to ionising radiation is the only established cause of thyroid cancer. In this study, we have examined radiation doses measured during diagnosis which used dental panoramic radiography. The measurement has been performed in the Suleyman Demirel University, at PlanmecaProMax 3D (cone beam) imaging unit. The device operates at 66-70 kV, 8-10/22 mA/s.