扩散加权成像（DWI）在膝关节前交叉韧带撕裂诊断中的价值研究

Diagnostic Value of Diffusion Weighted Imaging （DWI） in Anterior Cruciate Ligament Tears of the Knee

目的：研究扩散加权成像（DWI）在膝关节前交叉韧带（ACL）撕裂诊断中的价值.方法：回顾性分析65例ACL撕裂患者的临床及影像学资料,所有患者均行常规磁共振扫描并加扫DWI序列.参照关节镜检查结果,比较联合运用DWI前后对ACL撕裂诊断的正确率. 结果：65例患者经关节镜证实,ACL部分撕裂36例,完全撕裂29例.应用DWI前后ACL撕裂诊断符合率分别为70.8%（46/65）、90.7%（59/65）,2种方法诊断ACL撕裂符合率差异具有统计学意义（P〈0.05）.结论：膝关节常规磁共振检查联合DWI可以显著提高前交叉韧带撕裂诊断的正确率,减少了漏诊与误诊的发生.

Objective：To explore the value of Diffusion Weighted Imaging in the diagnosis of Anterior Cruciate Ligament Tear. Meth. otis： Clinical and imaging data of 65 cases of ACL tear proved by arthroseopy were analyzed retrospectively. They underwent both conven- tional magnetic resonance imaging and DWI. The diagnosis accordance rate of ACL tear with or without DWI was compared. Results： In 65 patients,there were 36 eases of patients with partial ACL tear and 29 eases of patients with complete ACL tear. The accurate rate of ACL tear diagnosis was 70.8% （ 46/65 ） and 90.7% （ 59/65 ） with or without DWI, they had statistically significant difference（ P 〈0. 05 ）. Conclusion： Combined application of conventional MR sequences and DW1 could improve the diagnosis accordance rate of ACL tear.