|ECR 2018 / C-0177|
|Comparative study to estimate diagnostic efficacy of 0,3 T MRI for evaluation of knee injuries, using arthroscopy as a reference standard|
Methods and materials
From January 2013 to March 2017 we enrolled 214 patients (143 males and 71 females aged from 17 to 72): in 95 patients the study was aimed to evaluating the right knee and in 119 the left knee.
Inclusion criteria were as follows: patients who 1) were subjected to RM knee exam with O-scan equipment (Esaote, Genoa) with dedicated coil and 2) had undergone diagnostic arthroscopy within 3 months after the examination of RM.
The examination was technically performed with slight knee flexion and intra-rotation; the standard assessment protocol includes 5 acquisitions (STIR, GRE T1, SE T1, FSE T2) on the three storeys of space.
Menisci, cruciate ligaments and the cartilage surfaces were evaluated by double-blind control procedure by two experienced radiologists, classifing lesions by Lotysch, AMA and Outerbridge grading. MRI findings were then compared to those of arthroscopy (considered the gold standard for the diagnosis of the aforementioned anatomical structures pathologies). For each examined element were calculated sensitivity, specificity, accuracy, positive and negative predictive value; interobserver concordance was calculated using Cohen's Kappa statistic.
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