Evaluation of CT techniques for reducing artifacts in the presence of metallic orthopedic implants

Douglas D. Robertson, Peter J. Weiss, Elliot K. Fishman, Donna Magid, Peter S. Walker

Research output: Contribution to journalArticlepeer-review

Abstract

Metallic intramedullary orthopedic implants generate artifacts that can markedly degrade transaxial CT images. The artifacts, typically seen as starburst streaking, result primarily from reconstructions involving missing projection data. Two approaches are clinically available to reduce the artifacts around orthopedic implants. These are (a) the imaging of implants with lower attenuation coefficients or smaller path lengths (less attenuating objects) and (b) the planar reformatting of image data. The sizing accuracy of these two approaches was quantified using phantoms and the efficacy using cadaveric femoral specimens. Results demonstrated that metal artifacts may be reduced and accurate bony dimensional data obtained.

Original languageEnglish (US)
Pages (from-to)236-241
Number of pages6
JournalJournal of computer assisted tomography
Volume12
Issue number2
DOIs
StatePublished - Jan 1 1988

Keywords

  • Artifacts
  • Bones, abnormalities
  • Computed tomography, techniques
  • Prostheses

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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