title: [Examination of incident angle for photography of axial projection of zygomatic arch].
abstract: In axial zygomatic arch roentgenography, the radiographic angle is determined by taking account of the light field-projected image. However, this method is technically difficult and has poor reproducibility because the body target surface is uncertain at the time of positioning. Therefore, we obtained 3D-CT images from CT examinations of the facial or paranasal sinus, and we assessed the X-ray beam angle where the zygomatic arch is most clearly delineated in terms of sex and age by taking the acanthion-meatal line (France horizon) as the reference. The zygomatic arch was most clearly seen when the X-ray beam angle was perpendicular to the acanthion-meatal line. Excellent images were obtained, and reproducibility of the images was improved using the radiographic technique based on this result.
authors.affiliation: Department of Radiology, Showa University Hospital.
authors.forename: Naoya
authors.initials: N
authors.lastname: Omae
authors.forename: Yasukazu
authors.initials: Y
authors.lastname: Ishihara
authors.forename: Hideki
authors.initials: H
authors.lastname: Ishida
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Nakazawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*; D015050:Zygoma / Q000000981:diagnostic imaging*