Magnetic resonance imaging (MRI) is accepted as an useful tool for the diagnosis of injury of the knee reently.
To evaluate the usefulness of MRI in the diagnosis of acute cruciate ligament tears, 28 cases of acute cruciate ligament injuries(12 cases of anterior cruciate igament(ACL) tears, 13 cases of posterior cruciate ligament(PCL) tears, and 3 cases of both ligament tears) with confirmatory tool of arthrotomy and arthoscopy.
We applied 3 direct and 4 indirect MR criteria for ACL tears, and 2 direct MR criteria for PCL tears.
@ES The results were as follows;
@EN 1. The accuracy of direct signs for ACL tears was 85.7%(sensitivity, 93.3%; specificity, 76.9%).
2. the accuracy of direct signs for PCL tears was 89.3%(sensitivity, 93.8; specificity, 83.3%).
3. The accuracy of indirect signs for ACL tears was 71.4%(sensitivity, 93.3%; spevcificity, 46.2%).
4. The specificity of MRI for the diagnosis ACL tears was increased with direct signs combining with indirect signs (100% in combination of direct sigh with 2 or inore indirect signs).
5. The diagnosis of ACI tears was more difficult than that PCL tear because of its thin and oblique course compared to PCL.
6. T2-weighted mimage was more helpful than T1-weighted image in the diagnosis of ligament tears.
In conclusion, MRI is an useful tool for the diagnosis of acute cruciate ligament tears, and the specificity of MRI for the diagnosis of ACL tears was increased with direct signs combining with indirect signs.
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