title: Optimal imaging protocol after intraocular silicone oil tamponade.
abstract: OBJECTIVE
  Our purpose was to define the optimal protocol for imaging of the orbits after vitreous humor replacement with silicone oil.
  
  
  METHODS
  Eleven eyes in 10 patients with tractional and/or rhegmatogenous retinal detachment were studied. Five CT scans and 18 high-field (1.5 T) MR images were obtained. Standard T1-weighted, T1-weighted with fat and silicone saturation, fast spin density-weighted, and T2-weighted orbital MR sequences were performed. Unique pulse sequences included fast spin density-weighted and T2-weighted imaging with and without fat saturation or silicone saturation, gradient-echo imaging, and short-tau inversion recovery imaging.
  
  
  RESULTS
  The T1-weighted MR and CT studies were comparable in displaying the silicone. However, the fat- or silicone-saturated fast T2-weighted sequences always showed the fibrous bands and subretinal fluid to best advantage. In one case, the eye also contained inadvertently retained perfluorocarbon liquid, which blended with silicone oil on both saturated images, requiring companion T1-weighted sequences without saturation to demonstrate its presence.
  
  
  CONCLUSIONS
  Simple, commonly available fat-saturated fast T2-weighted MR images supplemented by standard T1-weighted images are all that are needed to evaluate the eye efficiently after vitrectomy and tamponade.
authors.affiliation: Department of Radiology, Baylor College of Medicine, Houston, Tex 77030, USA.
authors.forename: R C
authors.initials: RC
authors.lastname: Herrick
authors.forename: L A
authors.initials: LA
authors.lastname: Hayman
authors.forename: R K
authors.initials: RK
authors.lastname: Maturi
authors.forename: P J
authors.initials: PJ
authors.lastname: Diaz-Marchan
authors.forename: R A
authors.initials: RA
authors.lastname: Tang
authors.forename: H M
authors.initials: HM
authors.lastname: Lambert
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012163:Retinal Detachment / Q000175:diagnosis* / Q000473:pathology; D012189:Retrospective Studies; D012827:Silicone Oils / Q000008:administration & dosage*; D014057:Tomography, X-Ray Computed; D014821:Vitrectomy
chemical_list: D012827:Silicone Oils