title: Magnetic resonance imaging versus bone scan for assessment of vascularization of the hydroxyapatite orbital implant.
abstract: We prospectively studied 10 patients who were status postenucleation and primary placement of the hydroxyapatite orbital implant. Both the technetium-99m bone scan and gadolinium-enhanced magnetic resonance images (MRI) were obtained on the same day at variable time points in the postoperative period in order to assess the degree of vascularization. Up to 78% of the bone scans were interpreted as being completely vascularized, while only 10% of the corresponding MRI scans were consistent with complete vascularization. Cost analysis showed that MRI was cost-effective imaging modality. We conclude that contrast-enhanced MRI provides a more accurate assessment of vascularization of the hydroxyapatite orbital implant when compared to bone scan.
authors.affiliation: University of Colorado Health Sciences Center, Denver, Colorado, USA.
authors.forename: G A
authors.initials: GA
authors.lastname: Jamell
authors.forename: D A
authors.initials: DA
authors.lastname: Hollsten
authors.forename: M J
authors.initials: MJ
authors.lastname: Hawes
authors.forename: D J
authors.initials: DJ
authors.lastname: Griffin
authors.forename: W C
authors.initials: WC
authors.lastname: Klingensmith
authors.forename: W L
authors.initials: WL
authors.lastname: White
authors.forename: J
authors.initials: J
authors.lastname: Spirnak
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001672:Biocompatible Materials; D002648:Child; D003287:Contrast Media; D003365:Costs and Cost Analysis; D017886:Durapatite; D015353:Eye Enucleation; D005137:Eye, Artificial; D005260:Female; D005682:Gadolinium; D006571:Heterocyclic Compounds; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000191:economics / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018919:Neovascularization, Physiologic; D009915:Orbit / Q000098:blood supply* / Q000000981:diagnostic imaging*; D009942:Organometallic Compounds; D016348:Osseointegration; D011446:Prospective Studies; D019736:Prostheses and Implants; D016284:Technetium Tc 99m Pentetate; D015899:Tomography, Emission-Computed, Single-Photon / Q000191:economics / Q000379:methods*
chemical_list: D001672:Biocompatible Materials; D003287:Contrast Media; D006571:Heterocyclic Compounds; D009942:Organometallic Compounds; C062402:gadoteridol; D017886:Durapatite; D005682:Gadolinium; D016284:Technetium Tc 99m Pentetate