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Abstract #1401

The value of 30°flexed knee MRI in evaluating anterior cruciate ligament tears

Xiao Jin1, Yakui Wang1, Qiang Zhao1, Ning Lang1, and Huishu Yuan1

1Radiology, Peking University Third Hospital, Beijing, China

The study aimed to investigate the value of 30°flexed knee MRI in evaluating anterior cruciate ligament (ACL) tears. 64 patients with knee trauma and hospitalized for arthroscopy were included and performed knee MRI in slightly flexed(about 17°) and 30° flexed positions successively. Images of both positions have high sensitivity, specificity and accuracy in diagnosing ACL tears.30°flexion images were superior to 17°in delineating ACL full length, torn ACL’s disrupted sites and ligament remnants, while no significant difference was found in delineating ACL double-bundle structure. Thus 30°flexed knee MRI was recommended in patients suspecting ACL tears.

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