Publication

Quantitative Analysis of Orthopedic Metal Artefact Reduction in 64-Slice Computed Tomography Scans in Large Head Metal-On-Metal Total Hip Replacement, a Phantom Study

Bone

Springerplus. 2016 Apr 2;5:405. eCollection 2016.

Authors:

MF. Boomsma, N Warringa, MA Edens, D. Mueller, HB Ettema, CC Verheyen, M. Maas

Summary

The study evaluates the Orthopedic Metal Artifact Reduction (O-MAR) algorithm's efficacy in mitigating artifacts from large-head metal-on-metal (MoM) total hip arthroplasty (THA) using a Perspex phantom containing calcium pellets simulating bone tissue.

Key findings:

Attenuation Deviation: O-MAR reduced metal-induced deviations in Hounsfield units (HU) by 43% (light disturbance), 68% (medium), and 32% (heavy) compared to standard reconstructions (p < 0.001).
Contrast-to-Noise Ratio (CNR): CNR improved by 72% (light) and 52% (medium) (p < 0.001), with no significant enhancement in heavily disturbed regions.
Artifact Severity: O-MAR improved subjective image quality for light/medium disturbances by enhancing pellet delineation but had limited impact on severe artifacts.

The study concludes that O-MAR significantly enhances CT image quality in MoM THA for mild-to-moderate artifact scenarios, supporting its clinical utility for assessing periprosthetic structures in large-head implants.

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