title: Evaluation of radiation doses from MDCT-imaging in otolaryngology.
abstract: The purpose of this study was to clarify patient doses in the current otolaryngological multi-detector row computed tomography (MDCT) examinations. Patient doses were measured with an in-phantom dosimetry system which was composed of 48 photodiode dosimeters embedded within an anthropomorphic phantom. Organ and effective doses were evaluated according to the International Commission on Radiological Protection Publication 103. In neck CT, doses for salivary glands and for thyroid were high, 7.6-29.9 and 13.4-60.3 mGy, respectively. In sinus CT, brain and lens doses were high, 7.6-24.6 and 10.6-32.0 mGy, respectively, and in inner ear CT, lens dose was 8.0-35.3 mGy. Effective doses were 1.8-6.6 mSv in neck CT, 0.5-0.9 mSv in sinus CT and 0.3-0.6 mSv in inner ear CT. The present dose data would be used to estimate radiation risks for patients undergoing otolaryngological MDCT examinations.
authors.affiliation: School of Health Sciences, Nagoya University, 1-1-20, Daikominami, Higashi-ku, Nagoya, Japan. kawaura@met.nagoya-u.ac.jp
authors.forename: Chiyo
authors.initials: C
authors.lastname: Yamauchi-Kawaura
authors.forename: Keisuke
authors.initials: K
authors.lastname: Fujii
authors.forename: Takahiko
authors.initials: T
authors.lastname: Aoyama
authors.forename: Masato
authors.initials: M
authors.lastname: Yamauchi
authors.forename: Shuji
authors.initials: S
authors.lastname: Koyama
mesh_terms: D006801:Humans; D010038:Otorhinolaryngologic Diseases / Q000000981:diagnostic imaging*; D019047:Phantoms, Imaging / Q000706:statistics & numerical data; D011829:Radiation Dosage; D011874:Radiometry / Q000706:statistics & numerical data*; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*