SPECT-CT compared with conventional imaging modalities for the assessment of the varus and valgus malaligned hindfoot.

Published

Journal Article

The combined single-photon emission computed tomography and conventional computed tomography (SPECT/CT) technique has increased the sensitivity and specificity of bone scans. We examined the value of using SPECT/CT for the assessment of coronal plane hindfoot deformities. Twenty-seven patients with varus (11 patients) or valgus (16 patients) malalignment of the hindfoot were assessed using radiography, conventional CT, bone scintigraphy, and SPECT/CT. The amount of deformity, stage of osteoarthritis, and level of activation on bone scans and SPECT/CT were measured. Activation was assessed in 12 regions of interest. The stage of osteoarthritis seen on plain radiographs correlated significantly with the level of activation detected on bone scans (p < 0.05). No correlation was observed between the amount of deformation and activity, and between bone scan activation and signs of osteoarthritis on CT scans. The varus malaligned ankles showed higher radioisotope uptake in the medial areas, while the valgus malaligned ankles showed increased uptake in the lateral areas (p < 0.05). SPECT/CT may be a valuable tool for the assessment and staging of osteoarthritis. Our findings underline the adverse effects of coronal plane deformity of the hindfoot. In addition, results from this study provide useful information for future basic research on coronal plane deformity of the hindfoot and for determining appropriate surgical approaches.

Full Text

Duke Authors

Cited Authors

  • Knupp, M; Pagenstert, GI; Barg, A; Bolliger, L; Easley, ME; Hintermann, B

Published Date

  • November 2009

Published In

Volume / Issue

  • 27 / 11

Start / End Page

  • 1461 - 1466

PubMed ID

  • 19472383

Pubmed Central ID

  • 19472383

Electronic International Standard Serial Number (EISSN)

  • 1554-527X

Digital Object Identifier (DOI)

  • 10.1002/jor.20922

Language

  • eng

Conference Location

  • United States