Quantitative analysis of metal artifact reduction in total hip arthroplasty using virtual monochromatic imaging and orthopedic metal artifact reduction, a phantom study

Mark Selles, Vera H. Stuivenberg, Ruud H. H. Wellenberg, Loes van de Riet, Ingrid M. Nijholt, Jochen A. C. van Osch, Robbert W. van Hamersvelt, Tim Leiner, Martijn F. Boomsma

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Objective: To quantify metal artifact reduction using 130 keV virtual monochromatic imaging (VMI) with and without orthopedic metal artifact reduction (O-MAR) in total hip arthroplasty. Methods: Conventional polychromatic images and 130 keV VMI of a phantom with pellets representing bone with unilateral or bilateral prostheses were reconstructed with and without O-MAR on a dual-layer CT. Pellets were categorized as unaffected, mildly affected and severely affected. Results: When 130 keV VMI with O-MAR was compared to conventional imaging with O-MAR, a relative metal artifact reduction in CT values, contrast-to-noise (CNR), signal-to-noise (SNR) and noise in mildly affected pellets (67%, 74%, 48%, 68%, respectively; p < 0.05) was observed but no significant relative metal artifact reduction in severely affected pellets. Comparison between 130 keV VMI without O-MAR and conventional imaging with O-MAR showed relative metal artifact reduction in CT values, CNR, SNR and noise in mildly affected pellets (92%, 72%, 38%, 51%, respectively; p < 0.05) but negative relative metal artifact reduction in CT values and noise in severely affected pellets (− 331% and -223%, respectively; p < 0.05), indicating aggravation of metal artifacts. Conclusion: Overall, VMI of 130 keV with O-MAR provided the strongest metal artifact reduction.

Original languageEnglish
Article number171
JournalInsights into imaging
Volume12
Issue number1
DOIs
Publication statusPublished - 1 Dec 2021

Keywords

  • Arthroplasty
  • CT
  • Dual energy
  • Hip
  • Replacement

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