Abstract: A total of 80 patients with lateral ligament injury of ankle joint were selected as the research object to explore the significance of 3.0T magnetic resonance imaging (MRI) in the evaluation of injury degree and treatment effect. The thickness of the anterior talofibular ligament in the affected side was higher than that in the healthy side (P<0.05). The thickness of the anterior talofibular ligament in the affected side was positively correlated with the degree of injury (P<0.05). The degree of injury, course of disease, previous ankle injury, and the thickness of the anterior talofibular ligament at 4, 8 and 12 weeks after treatment were all the influencing factors for the poor curative effect of patients with lateral ankle ligament injury (P<0.05). The AUC values of talofibular anterior ligament thickness were 0.760, 0.823 and 0.869 at 4, 8 and 12 weeks after treatment, respectively. The AUC value was the highest at 12 weeks after treatment. Therefore, 3.0T MRI can clearly show the pathological changes after lateral ankle ligament injury, accurately evaluate the location and degree of injury, which is conducive to clinical efficacy evaluation, and provide accurate imaging basis for the selection of the best treatment method.

Key words: 3.0T magnetic resonance imaging, injury of the lateral ankle ligament, anterior talofibular ligament, efficacy evaluation