[Determination of absorbed doses of radiation in patients during orthopantomography].

Abstract

The aim of this study was to determine the absorbed doses of radiation in the skin region of temporomandibular joint (T.M.J.) maxillary sinus, parotid gland, body of mandible and thyroid gland during orthopantomographic examination. For this purpose were used a siemens orthopantomograph-OP2, Palomex OY: 75 KVp, 15 mA and 15 sec; 47 male patients about the same age, weighing and height who were selected from the oral Diagnosis Clinic of Athens University, and had indication for orthopantomographic examination. The calculation was performed with thermoluminescent dosimeters (T.L.D.) which were calibrated by a known source of Co60 before use. Dosimetry were calculated in T.L.D. detector Model 2000 A-2000 C Harshaw Chemical Co. and the results of calculations were the following: 1. Dose above 0.35 cGy received the parotid and the thyroid region. 2. Dose below 0.35 cGy received the T.M.J., maxillary sinus and body of mandible region. 3. Doses on the right side were greater than the left side.