Sensitivity of spiral computed tomography scanning for detecting intraocular foreign bodies.


Journal Article

OBJECTIVE:The purpose of this study is to determine whether 3-mm computed tomography (CT) cuts are equivalent to 1-mm CT cuts for detecting small intraocular foreign bodies (IOFBs). DESIGN:Experimental instrument validation study. PARTICIPANTS:Seventy-two porcine eyes were divided into three groups. Each group had 0.5 ml of human blood injected into the vitreous cavity and were surgically implanted with IOFBs. INTERVENTION:Each eye was surgically implanted with 0.5-mm metallic, 0.5-mm glass, or 0.5-mm stone IOFBs. Two additional eyes were left without IOFBs to serve as negative controls. MAIN OUTCOME MEASURES:Axial CT images of both 3-mm and 1-mm thickness were obtained and analyzed in masked fashion by two separate neuroradiologists. RESULTS:The sensitivity for detecting 0.5-mm metallic, 0.5-mm glass, and 0.5-mm stone IOFBs with 3-mm CT images was 100%. The sensitivity for detecting 0.5-mm metallic, 0.5-mm glass, and 0.5-mm stone IOFBs with 1-mm CT images was also 100% (confidence interval, 95%; range, 0.88-1.00). Two negative control eyes without IOFBs were also correctly evaluated by the neuroradiologists. CONCLUSIONS:With modern spiral CT scanning, 3-mm cuts are as sensitive as 1-mm cuts for detecting small metallic, glass, and stone IOFBs.

Full Text

Duke Authors

Cited Authors

  • Dass, AB; Ferrone, PJ; Chu, YR; Esposito, M; Gray, L

Published Date

  • December 2001

Published In

Volume / Issue

  • 108 / 12

Start / End Page

  • 2326 - 2328

PubMed ID

  • 11733280

Pubmed Central ID

  • 11733280

Electronic International Standard Serial Number (EISSN)

  • 1549-4713

International Standard Serial Number (ISSN)

  • 0161-6420

Digital Object Identifier (DOI)

  • 10.1016/s0161-6420(01)00808-9


  • eng