ArticleJournal of magnetic resonance imaging : JMRI2026
MRI of Total Hip Arthroplasty: Successful Ripple Artifact Reduction Using Wavelet Domain Filtering.
Article in Journal of magnetic resonance imaging : JMRI, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
7 authors.
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Abstract
backgroundSlice encoding for metal artifact correction (SEMAC) is used in MRI for total hip arthroplasties for metal artifact reduction. However, ripple artifacts often arise near the implant, impairing diagnosis in affected regions. HYPOTHESIS: Applying a wavelet domain filter (WD-Filter) might reduce ripple artifacts and improve image quality. STUDY TYPE: Retrospective. SUBJECTS: 100 patients with primary total hip arthroplasty (female: 51, mean age: (64 ± 13) years; male: 49, mean age: (65 ± 13) years) who underwent clinically indicated MRI using compressed sensing SEMAC. FIELD STRENGTH/SEQUENCES: 1.5 T; compressed sensing-accelerated turbo spin-echo (TSE)-based SEMAC sequence. ASSESSMENT: Three readers rated 250 ripple artifacts before and after applying the WD-filter. 4-point Likert scales were used for the intensity of ripple artifacts (Likert-RA, "none": 1, "mild": 2, "moderate": 3, "severe": 4) and the image quality (Likert-IQ, "poor": 1, "moderate": 2, "good": 3, "excellent": 4). The relative reduction of the signal intensity standard deviation ( STATISTICAL TESTS: Inter-reader agreement was assessed with Fleiss' kappa, with 95% confidence intervals. Differences between pre- and post-filter ratings (Likert-RA and Likert-IQ) were evaluated using the Wilcoxon signed-rank test, while
resultsPrior to WD-Filter application, DATA
conclusionThe WD-Filter effectively reduced ripple artifacts in MRI of total hip arthroplasty and improved image quality. EVIDENCE LEVEL: 3. TECHNICAL EFFICACY: Stage 3.
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