Department of Radiology, Huashan Hospital, Fudan University, Shanghai, P.R. China.
Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, P.R. China.
J Magn Reson Imaging. 2018 Jan;47(1):69-77. doi: 10.1002/jmri.25745. Epub 2017 Apr 27.
To quantitatively evaluate the cartilage alteration of talus for chronic lateral ankle instability (LAI) with isolated anterior talofibular ligament (ATFL) tear and combined ATFL and calcaneofibular ligament (CFL) tear using T -mapping at 3.0T.
In all, 27 patients including 17 with isolated ATFL tear and 10 with ATFL+CFL tear, and 21 healthy subjects were recruited. All participants underwent T -mapping scan at 3T and patients completed American Orthopaedic Foot and Ankle Society (AOFAS) scoring. The total talar cartilage (TTC) was segmented into six compartments: medial anterior (MA), medial center (MC), medial posterior (MP), lateral anterior (LA), lateral center (LC), and lateral posterior (LP). The T value of each compartment was measured from T -mapping images. Data were analyzed with one-way analysis of variance (ANOVA), Student's t-test, and Pearson's correlation coefficient.
The T values of MA, MC, MP, TTC in the ATFL group and MA, MC, MP, LC, LP, TTC in the ATFL+CFL group were higher than those in the control group (P < 0.05). Moreover, the T values of MC, MP, LC, and TTC in the ATFL+CFL group were higher than those in the ATFL group (P < 0.05). The T values of MA in both patient groups were negatively correlated with AOFAS scores (r = -0.596, r = -0.690, P < 0.05).
Chronic LAI with ATFL tear had a trend of increasing cartilage T values in talar trochlea, mainly involving medial cartilage compartments. Chronic LAI with ATFL+CFL tear might result in higher T values in a much larger cartilage region than with ATFL tear. MA could be the main cartilage compartment that may affect the patient's clinical symptoms.
1 Technical Efficacy: Stage 3 J. Magn. Reson. Imaging 2018;47:69-77.
在 3.0T 磁共振上使用 T1-mapping 定量评估慢性外侧踝关节不稳（LAI）伴单纯前距腓韧带（ATFL）撕裂和合并 ATFL 和跟腓韧带（CFL）撕裂的距骨软骨改变。
共纳入 27 例患者，其中单纯 ATFL 撕裂 17 例，ATFL+CFL 撕裂 10 例，21 例健康志愿者作为对照组。所有参与者均在 3T 行 T1-mapping 扫描，患者完成美国矫形足踝协会（AOFAS）评分。将整个距骨软骨（TTC）分为 6 个区域：内侧前（MA）、内侧中心（MC）、内侧后（MP）、外侧前（LA）、外侧中心（LC）和外侧后（LP）。从 T1-mapping 图像上测量每个区域的 T 值。采用单因素方差分析（ANOVA）、Student's t 检验和 Pearson 相关系数进行数据分析。
ATFL 组的 MA、MC、MP、TTC 的 T 值和 ATFL+CFL 组的 MA、MC、MP、LC、LP、TTC 的 T 值均高于对照组（P<0.05）。此外，ATFL+CFL 组的 MC、MP、LC 和 TTC 的 T 值均高于 ATFL 组（P<0.05）。两组患者的 MA 的 T 值与 AOFAS 评分呈负相关（r=-0.596，r=-0.690，P<0.05）。
慢性 LAI 伴 ATFL 撕裂时，距骨滑车的软骨 T 值呈升高趋势，主要累及内侧软骨区域。慢性 LAI 伴 ATFL+CFL 撕裂可能导致比 ATFL 撕裂更大的软骨区域 T 值升高。MA 可能是影响患者临床症状的主要软骨区域。
1 技术功效：第 3 级 JMRI 2018；47：69-77。
