title: Assessment of intraocular foreign bodies by helical-CT multiplanar imaging.
abstract: The aim of this study was to examine the effectiveness of helical CT in the assessment of intraocular foreign bodies, evaluating two protocols with different collimation. We performed helical-CT studies in 30 patients. Fifteen patients were examined with 1.5-mm collimation and the other 15 patients with 3.0-mm collimation. All other imaging parameters were identical in both protocols. Multiplanar images were reconstructed. The examinations were reviewed for presence, localization and size of intraocular foreign bodies. We compare our results with the surgical data. We estimate the required examination time. In the first group (collimation 1.5 mm) an intraorbital foreign body was detected in 8 of 15 patients. In 3 of 8 patients an intraocular foreign body (all were metallic) was detected. In the second group (collimation 3.0 mm) an intraorbital foreign body was detected in 9 of 15 patients. In 8 of 9 patients an intraocular foreign body (all were metallic) was detected. Our results were confirmed by surgery in all cases. Examination time was 36 s in the first group and 18 s in the second group. Computed tomography should be considered the imaging modality of choice in the assessment of metallic intraocular foreign bodies and 3.0-mm collimation is optional, because of reduced examination time and radiation exposure.
authors.affiliation: Department of Computed Tomography, G. Gennimatas General Hospital, Athens, Greece.
authors.forename: A
authors.initials: A
authors.lastname: Papadopoulos
authors.forename: A
authors.initials: A
authors.lastname: Fotinos
authors.forename: V
authors.initials: V
authors.lastname: Maniatis
authors.forename: S
authors.initials: S
authors.lastname: Kavadias
authors.forename: A
authors.initials: A
authors.lastname: Michaelides
authors.forename: M
authors.initials: M
authors.lastname: Avouri
authors.forename: C
authors.initials: C
authors.lastname: Kalamara
authors.forename: K
authors.initials: K
authors.lastname: Stringaris
mesh_terms: D000328:Adult; D005129:Eye Foreign Bodies / Q000000981:diagnostic imaging*; D005260:Female; D005547:Foreign Bodies / Q000000981:diagnostic imaging; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008670:Metals; D008875:Middle Aged; D009915:Orbit / Q000000981:diagnostic imaging; D011446:Prospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D008670:Metals