ANTERIOR CRUCIATE LIGAMENT TEAR - PROSPECTIVE EVALUATION OF DIAGNOSTIC-ACCURACY OF MIDDLE-FIELD-STRENGTH AND HIGH-FIELD-STRENGTH MR-IMAGING AT 1.5 AND 0.5 T
ANTERIOR CRUCIATE LIGAMENT TEAR - PROSPECTIVE EVALUATION OF DIAGNOSTIC-ACCURACY OF MIDDLE-FIELD-STRENGTH AND HIGH-FIELD-STRENGTH MR-IMAGING AT 1.5 AND 0.5 T
复制标题
DOI：
10.1148/radiology.197.3.7480763
复制
发表时间：
1995-12-01
期刊：
影响因子：
19.7
通讯作者：
AMENDOLA, A
中科院分区：
文献类型：
--
作者：
VELLET, AD;LEE, DH;AMENDOLA, A
目的：比较当代中场强和高场强磁共振成像仪对前交叉韧带撕裂的诊断价值。材料与方法：在230例膝关节成像患者中，114例在0.5和1.5T扫描序列相同，但总成像时间略长，0.5T扫描带宽优化。放射科医生对诊断和场强视而不见。结果：86例前交叉韧带断裂患者和28例前交叉韧带完整患者在诊断前交叉韧带撕裂的准确性、敏感度和特异度方面无差异。在0.5T和1.5T时，前交叉韧带撕裂的诊断准确率分别为90%和91%。同样，半月板撕裂(79例，149例)和后交叉韧带损伤(7例，107例)的诊断没有差别。
PURPOSE: To compare the diagnostic efficacy of current-generation middle- and high-field-strength magnetic resonance (MR) imagers in the diagnosis of anterior cruciate ligament (ACL) tears.MATERIALS AND METHODS: In 114 of 230 patients referred for knee imaging, MR imaging at 0.5 and 1.5 T was performed with identical sequences but with a slightly longer total imaging time and bandwidth optimization at 0.5 T. Radiologists were blinded to diagnosis and field strength. Sensitivity, specificity, and accuracy were determined, and ACL tear was confirmed by means of arthroscopy and pathology.RESULTS: There was no difference between the field strengths in accuracy, sensitivity, or specificity for the diagnosis of ACL tears in 86 patients with disrupted ACLs and 28 patients with intact ACLs. Accuracy for all ACL tears was 90% at 0.5 T and 91% at 1.5 T. Similarly, there were no differences in diagnosis of meniscal tears (79 with, 149 without) or posterior cruciate ligament tears (seven with, 107 without).CONCLUSION: Higher field strength does not confer higher accuracy in the diagnosis of ACL tears at MR imaging.