弥散法MR膝关节造影在半月板损伤诊断中应用探讨

目的　用弥散法MR膝关节造影对半月板撕裂进行检查 ,探讨其临床应用价值。方法　检查 2 4例临床怀疑半月板撕裂的膝关节。采用常规检查技术进行扫描 ,然后进行弥散法膝关节造影检查 ,再经关节镜或手术证实。将常规扫描结果、弥散法关节腔造影结果与手术结果对照 ,分别算出常规扫描结果和弥散法结果的敏感性和特异性。结果　弥散法膝关节造影可使半月板撕裂处信号强度明显高于平扫时的信号 ,同时检查的敏感性从 74.2 %提高到 94.3 % ,特异性从 88%提高到 93 .4%。结论　弥散法膝关节造影在半月板撕裂检查上 ,从图像质量到检查的敏感性均优于常规MR检查

The Application of MR Dispersion Arthrography in Meniscus Tear of Knee

Objective To study the clinial application value of MR dispersion arthrography in meniscus tear of knee.Methods The conventional MR scans of 24 knee joints in 24 patients who were considered to have meniscus tear were performed and followed by MR dispersion arthrography.All cases were approved by arthroscope or operation.The results of both convention MR scan and MR arthrography were compared with arthroscope and operation.The sensitivity and the specificity of plain MR scan and MR dispersion scan were evaluated respectively.Results The signal intensity in the area of meniscus tear was obiously highen on MR dispersion scan than that of MR plain scan.The sensitivity was improved from 74.2% to 94.3% ,and the specificity improved from 88% to 94.3%.Conclusion MR dispersion scan is superior to convention MR scan in image quality and sensitivity in detecting meniscus tear.