MRI evaluate the position of talus in patients with chronic ankle instability
10.3969/j.issn.1000-6710.2025.03.002
- VernacularTitle:采用磁共振成像评估慢性踝关节不稳患者距骨的位置
- Author:
Xiangquan CAI
1
;
Jie WANG
1
;
You ZHOU
1
Author Information
1. 三峡大学附属仁和医院骨科,三峡大学运动医学研究所,宜昌市运动损伤与修复临床医学研究中心(湖北 宜昌 443001)
- Publication Type:Journal Article
- Keywords:
chronic ankle instability;
talus;
position;
MRI
- From:
Chinese Journal of Sports Medicine
2025;44(3):177-183
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the position of the talus on the axial images of magnetic resonance imaging(MRI)of the ankle joint in patients with chronic ankle instability(CAI)and to identify the indirect signs for diagnosing CAI.Methods Fifty patients hospitalized in our hospital between January 1,2021 and July 1,2023 for chronic ankle instability(CAI)were selected into the experimental group,while 50 counterparts treated in our hospital for other diseases were chosen into the control group.The basic information of both groups was recorded.The internal measurement tools of the Picture Ar-chiving and Communication System(PACS)were used to measure the malleolar talus index(MTI)and two new measurement methods:talus movement index(TMI)and talus comprehensive index(TCI)on the axial images of ankle MRI to evaluate the position of the talus in the ankle mortise.Sta-tistical analysis was then performed.Results There was no significant difference between the two groups in terms of age,sex ratio,affected side ratio,height,weight and body mass index(BMI)(P>0.05).Compared with the control group,the MTI(86.56°±3.54° vs.85.28°±2.77°,P<0.05),TMI(2.00°±2.36° vs.-2.00°±2.54°,P<0.001)and TCI(4.70°±2.98° vs.1.90°±2.01°,P<0.001)of the experi-mental group increased.The area under the ROC curve of TMI and TCI was 0.841 and 0.794,respec-tively.The optimal cut-off points for diagnosing CAI based on TMI and TCI were 0.5° and 4.5°,re-spectively.Conclusion Patients with CAI show changes in the bony structure of the ankle joint.Specifi-cally,on the axial MRI images of the ankle joint,there are simultaneous posterior displacement and internal rotation of the talus,which may be an indirect sign for the diagnosis of CAI.
