Absorbed doses from temporomandibular joint radiography.
Thermoluminescent dosimeters were used in a tissue-equivalent phantom to measure doses of radiation absorbed by various structures in the head when the temporomandibular joint was examined by four different radiographic techniques--the transcranial, transorbital, and sigmoid notch (Parma) projections and the lateral tomograph. The highest doses of radiation occurred at the point of entry for the x-ray beam, ranging from 112 mrad for the transorbital view to 990 mrad for the sigmoid notch view. Only the transorbital projection a radiation dose to the lens of the eye. Of the four techniques evaluated, the lateral tomograph produced the highest doses to the pituitary gland and the bone marrow, while the sigmoid notch radiograph produced the highest doses to the parotid gland.
D001853:Bone Marrow / Q000528:radiation effects; D007908:Lens, Crystalline / Q000528:radiation effects; D008348:Manikins; D010306:Parotid Gland / Q000528:radiation effects; D010902:Pituitary Gland / Q000528:radiation effects; D011187:Posture; D011829:Radiation Dosage; D013704:Temporomandibular Joint / Q000000981:diagnostic imaging* / Q000528:radiation effects; D013819:Thermoluminescent Dosimetry / Q000379:methods; D014056:Tomography, X-Ray