Abstract
Magnetic resonance imaging effectively defines and characterizes musculoskeletal pathologic lesions, par ticularly meniscal tears. Most studies comparing the efficacy of magnetic resonance imaging and arthro scopic evaluation have been performed on high-field (1.5-T) systems. The effectiveness of a low-field (0.2- T), dedicated, extremity magnetic resonance imaging device in diagnosing meniscal tears was studied pro spectively on 35 patients with knee symptoms who subsequently had arthroscopic evaluation. Magnetic resonance imaging examinations were performed be fore surgery and were read by an experienced radiol ogist who was blinded to the results of the arthroscopic evaluations. Specificity was 100% for both the medial and lateral menisci. Sensitivity was 86% for the medial menisci, 89% for the lateral menisci, and 87% for both. Accuracy was 91 % for the medial menisci, 97% for the lateral menisci, and 94% overall. The positive predic tive values were 100% for the medial menisci, 100% for the lateral menisci, and 100% for both. The nega tive predictive values were 81 % for the medial menisci, 96% for the lateral menisci, and 91 % for both. The low-field magnetic resonance imaging system provided specificity and sensitivity that were equal to or better than previous reports with high-field systems. In par ticular, this low-field system eliminated the problem of false-positive results that has been found in some stud ies using high-field systems.
Subject
Physical Therapy, Sports Therapy and Rehabilitation,Orthopedics and Sports Medicine
Reference34 articles.
1. Barile A., Masciocchi C., Mastantuono M., et al The use of a "dedicated" MRI system in the evaluation of knee joint diseases Clin MRI 5 79-82, 1995
2. MR diagnosis of internal derangements of the knee: effect of field strength on efficacy.
3. Boden SD, Davis DO, Dina TS, et al A prospective and blinded investigation of magnetic resonance imaging of the knee Abnormal findings in asymptomatic subjects Clin Orthop 282 177-185, 1992
4. Boeree NR, Watkinson AF, Ackroyd CE, et al Magnetic resonance imaging of meniscal and cruciate injuries of the knee J Bone Joint Surg 73B 452-457, 1991
5. Meniscal tears of the knee: accuracy of MR imaging.
Cited by
22 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献