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| Diagnosis of anterior cruciate ligament partial tear by imaging the knee in side-lying and buckling to maximum position in 3.0T |
| XU Zijun1, TANG Guangyu1,SHAO Hongda1,ZHANG Changbao1,HUA Ting1,XU Yu1,and TANG Huan2 |
1.Department of Radiology, Shanghai Tenth People’s Hospital, Tongji University,Shanghai 200072, China;
2. Department of Radiology, Huadong Hospital, Fudan University,Shanghai 200040,China |
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Abstract Objective To investigate whether MR imaging of knees in a side-lying and buckling to maximum position can improve the diagnostic rate of anterior cruciate ligament (ACL) partial tear.Methods Three hundred and twenty-four patients who were diagnosed with ACL partial tear were included in this study. According to the difference of intervals between the time of injury and the time for MR imaging, these patients were divided into three groups: the subacute, intermediate and chronic groups. All the patients underwent MR imaging in both the routine, side-lying and buckling to maximum position, and knee arthroscopy was performed after the MR scan. Three radiologists were invited to make a diagnosis through blind evaluation of the MR images acquired in the routine knee position. The diagnostic results were saved as group A. The MR images of the routine and side-lying and buckling to maximum position of knees were subjected to blind evaluation by another three radiologists after three months, and the diagnostic results were saved as group B, with the results of knee arthroscopy as reference. The difference between these two groups was analyzed statistically.Results The diagnostic rate of group B was comparable to the result of knee arthroscopy. The positive diagnostic rate of group B was much higher than that of group A.Conclusions MR imaging in the side-lying and buckling position of the knee can improve the diagnostic rate of patients with anterior cruciate ligament partial tear, and this MR imaging method is more sensitive for diagnosing patients with ACL partial tear more than 3 months after injury.
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Received: 25 February 2017
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2017, Vol. 28 
