Abstract • Computed tomography (CT) is useful in detecting metallic intraocular foreign bodies. Magnetic resonance imaging (MRI) is a technique that might allow the detection and localization of nonmetallic intraocular foreign bodies. We performed CT and MRI scans on ten freshly enucleated sheep eyes, eight of which contained nonmetallic intraocular foreign bodies of wood, glass, plastic, or rock. Computed tomography correctly detected seven of eight foreign bodies, while MRI detected all eight of the foreign bodies. Computed tomography is necessary to determine the presence of a metallic foreign body, but when the CT scan is negative, MRI may still detect small nonmetallic foreign bodies. References 1. Tate E, Cupples H: Detection of orbital foreign bodies with computed tomography: Current limits . Am J Radiol 1981;137:493-495. 2. Weisman RA, Savino PJ, Schut L, et al: Computed tomography in penetrating wounds of the orbit with retained foreign bodies . Arch Otolaryngol Head Neck Surg 1983;109:265-268.Crossref 3. Macrae JA: Diagnosis and management of a wooden orbital foreign body: Case report . Br J Ophthalmol 1979;63:848-851.Crossref 4. Ferguson E: Deep wooden foreign bodies of the orbit: A report of two cases . Trans Am Acad Ophthalmol Otolaryngol 1970;74:778-787. 5. Loffredo A, Cennamo G, Sammartino A, et al: The value of the association of radiological methods with echographic examination in the study of intraocular foreign bodies . Ophthalmologica 1979;179:18-24.Crossref 6. Reshef DS, Ossoinig KC, Nerad JA: Diagnosis and intraoperative localization of a deep orbital organic foreign body . Orbit 1987;6:3-15.Crossref 7. Lagouros PA, Langer BG, Peyman GA, et al: Magnetic resonance imaging and intraocular foreign bodies . Arch Ophthalmol 1987;105:551-553.Crossref 8. Sassani JW, Peart RE, Hook NW, et al: Combined use of A-scan ultrasound plain roentgenograms and computerized axial tomography in the evaluation of a pseudo-intraocular foreign body . J Clin Ultrasound 1984;12:171-173.Crossref 9. Henrikson GC, Mafee MF, Flanders AE, et al: CT evaluation of plastic intraocular foreign bodies . Am J Neuroradiol 1987;8:378-379.
Archives of Ophthalmology – American Medical Association
Published: Feb 1, 1988