[Magnetic resonance and arthroscopy of the knee. A double-blind study in 40 patients].
To evaluate the capabilities of ultra-low-field MR for the high-resolution imaging of the knee with a short acquisition time, a prospective double-blind study was carried out on 40 consecutive patients with acute or chronic articular conditions who were examined with both MR imaging and arthroscopy. Three-dimensional gradient-echo MR sequences were employed which allow many thin high-resolution slices to be obtained in a relatively short time. To evaluate the results arthroscopy, performed the day after MR imaging, was considered the gold standard. MR imaging and arthroscopy were in agreement in 84.6% of meniscal tears with 91.6% sensitivity and 80% specificity, in 82% of anterior cruciate ligament lesions with 100% sensitivity and 80% specificity and in 81% of cartilage lesions with 100% sensitivity and 61% specificity. On the whole, MR imaging and arthroscopy were in agreement in 82.5% of cases with 97.2% sensitivity and 75.3% specificity. MR imaging gave more information about collateral ligament, muscle and bone involvement. These results confirm the capabilities of ultra-low-field MR imaging in the study of the knee: the technique allows diagnostic studies to be performed in a short time, at a low cost, and with similar results to those obtained with higher field strengths.
D'Erme
M
M
Istituto Chirurgico Ortopedico Traumatologico (ICOT), Latina.
Ventura
M
M
Di Giacomo
G
G
Pasquali Lasagni
M
M
D016118:Anterior Cruciate Ligament / Q000473:pathology; D000070598:Anterior Cruciate Ligament Injuries; D001182:Arthroscopy / Q000706:statistics & numerical data; D002358:Cartilage, Articular / Q000293:injuries / Q000473:pathology; D004311:Double-Blind Method; D005069:Evaluation Studies as Topic; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis / Q000453:epidemiology; D007719:Knee Joint / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D008592:Menisci, Tibial / Q000473:pathology; D011446:Prospective Studies; D000070600:Tibial Meniscus Injuries
Risonanza magnetica e artroscopia del ginocchio. Studio a doppio cieco in 40 pazienti.