Magnetic resonance imaging versus bone scan for assessment of vascularization of the hydroxyapatite orbital implant

Ophthalmic Plast Reconstr Surg. 1996 Jun;12(2):127-30. doi: 10.1097/00002341-199606000-00007.


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.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Biocompatible Materials*
  • Child
  • Contrast Media
  • Costs and Cost Analysis
  • Durapatite*
  • Eye Enucleation
  • Eye, Artificial
  • Female
  • Gadolinium
  • Heterocyclic Compounds
  • Humans
  • Magnetic Resonance Imaging / economics
  • Magnetic Resonance Imaging / methods*
  • Male
  • Middle Aged
  • Neovascularization, Physiologic*
  • Orbit / blood supply*
  • Orbit / diagnostic imaging*
  • Organometallic Compounds
  • Osseointegration
  • Prospective Studies
  • Prostheses and Implants*
  • Technetium Tc 99m Pentetate
  • Tomography, Emission-Computed, Single-Photon / economics
  • Tomography, Emission-Computed, Single-Photon / methods*


  • Biocompatible Materials
  • Contrast Media
  • Heterocyclic Compounds
  • Organometallic Compounds
  • gadoteridol
  • Durapatite
  • Gadolinium
  • Technetium Tc 99m Pentetate