Improving petrous bone reproduction in lateral cephalometric films.
The purpose of this method is to improve the reproduction of the petrous bone area in cephalometric lateral head roentgenograms. Metal screens are used to project a high-voltage x-ray beam only to this area. Two techniques using a lead screen or a copper filter screen are described. Reproduction of the points porion and basion and of the temporomandibular joint is considerably improved.
D002508:Cephalometry; D006801:Humans; D010579:Petrous Bone / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000295:instrumentation / Q000379:methods*