title: Radiation dosimetry in tomography of the teeth and jaws using a multi-film cassette.
abstract: The absorbed doses and energy imparted in lateral and antero-posterior tomography of the teeth and jaws were measured. A multi-film cassette with 5 films was exposed using a diameter of the circular collimator of 1.5 cm. With one exception, the absorbed doses were below 1 mGy. The parotid gland towards the roentgen tube received about 2 mGy in lateral tomography of the mandibular third molar. The energy imparted in lateral tomography was 0.6 mJ and in antero-posterior tomography about 2.5 mJ. Since the radiation doses in tomography of the teeth and jaws were low compared with estimated risk levels, they should not deter from using tomography.
mesh_terms: D006801:Humans; D007568:Jaw / Q000000981:diagnostic imaging*; D010306:Parotid Gland / Q000000981:diagnostic imaging; D011829:Radiation Dosage; D011861:Radiography, Dental / Q000295:instrumentation*; D012306:Risk; D013819:Thermoluminescent Dosimetry; D014056:Tomography, X-Ray / Q000295:instrumentation*; D014070:Tooth / Q000000981:diagnostic imaging*; D014962:X-Ray Film