Risonanza magnetica del ginocchio in pazienti con protesi monocompartimentale mediale: confronto tra sequenze a 1,5 T

Translated title of the contribution: MR imaging of the knee in patients with medial unicompartmental arthroplasty: Comparison among sequences at 1.5 T

A. Aliprandi, F. Perona, M. Bandirali, P. Randelli, P. Cabitza, F. Sardanelli

Research output: Contribution to journalArticle


Purpose: This study was done to test a series of magnetic resonance (MR) imaging sequences of the knee after medial unicompartmental arthroplasty. Materials and methods: Four patients who had undergone Oxford III medial unicompartmental arthroplasty underwent 1.5-T MR imaging of the operated knee using coronal sequences: T1-weighted spin-echo (SE), T1-weighted turbo SE (TSE), proton-density (PD)- and T2-weighted TSE, T1-weighted gradient echo (GE), short-tau inversion recovery (STIR), multi echo data image combination (MEDIC), T2*-weighted GE, volumetric interpolated breath-hold examination (VIBE), and dual-echo steady state (DESS). For each sequence, we evaluated the visibility of the anatomical structures of the central pivot, lateral compartment, and anterior compartment using a semiquantitative score (0=total masking; 1=insufficient visibility; 2=sufficient visibility; 3=optimal visibility). The sum of the scores given to each sequence was divided by the maximal sum, obtaining a percentage visibility index. Friedman and sign tests were used for statistical analysis. Results: MR examination time was 30-32 min. No patients reported pain, heat or other local discomfort. The visibility index ranged between 83% and 89% for the first four sequences without significant differences among them, 58% for STIR and 11%-36% for the last five sequences. Significant differences were found between each of the four first sequences and the remaining sequences (p

Original languageItalian
Pages (from-to)301-311
Number of pages11
JournalRadiologia Medica
Issue number2
Publication statusPublished - Mar 2009


ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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