title: Radiation dose to the lens from computed tomography scanning in a neuroradiology department.
abstract: The radiation dose to the lens was measured by thermoluminescent dosimetry on 194 patients undergoing routine head and neck computed tomography scanning in a neuroradiology department. The results are lower than previously reported: brain scans, mean value 5.1 mGy; orbital scans, mean value 18.5 mGy; and direct coronal pituitary scans, mean value 1.9 mGy. These lower values in axial brain scans are due to use of the supraorbital meatal baseline for radiographic positioning.
authors.affiliation: Neuroradiology Department, Southern General Hospital NHS Trust, Glasgow, UK.
authors.forename: A C
authors.initials: AC
authors.lastname: Maclennan
authors.forename: D M
authors.initials: DM
authors.lastname: Hadley
mesh_terms: D001921:Brain / Q000000981:diagnostic imaging*; D003430:Cross-Sectional Studies; D006801:Humans; D007908:Lens, Crystalline / Q000528:radiation effects*; D009915:Orbit / Q000000981:diagnostic imaging*; D010902:Pituitary Gland / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D013819:Thermoluminescent Dosimetry; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods