跟腱断裂的MRI表现

MRI findings of achilles tendon rupture

目的分析跟腱断裂的MRI表现。方法回顾性分析7例跟腱断裂的MRI表现。7例均行常规MR轴面T1WI、T2WI，矢状面T1WI、T2WI和频率敏感脂肪抑制（SPIR）序列扫描。结果完全性跟腱断裂6例，部分性跟腱断裂1例，跟腱断裂部位发生于跟腱附着于跟骨部位上方2．6～11．0cm，平均5．4cm。跟腱断裂的MRI表现为跟腱肿大增粗（7例）、变形，呈波浪状（2例）。跟腱纤维部分或完全不连续和腱内信号强度增强（7例），完全性跟腱断裂的裂隙宽度为3．0～8．0mm，断端水肿、充满血液，于MR T2WI和SPIR呈高信号。7例跟腱断裂在T1WI均呈中等信号；在T2WI 1例呈中等信号，3例呈中-高信号，3例呈高信号；在SPIR2例呈中-高信号，5例呈高信号。跟腱前脂肪垫模糊，见于6例完全性跟腱断裂。结论MRI能较好显示跟腱断裂和明确诊断。

Objective To evaluate the MRI findings of achilles tendon rupture. Methods The MRI data of 7 patients with achilles tendon rupture were retrospectively analysed. All 7 patients were male with the age ranging from 34 to 71 years. Routine MR scanning was performed in axial and sagittal planes, including T1WI, T2 WI and a fat suppression MRI （SPIR）. Results Among 7 patients, complete achilles tendon rupture was seen in 6 cases, partial achilles tendon rupture 1 case. The site of tendon disruption were 2. 6-11.0 cm（ mean 5.4 cm） proximal to the insertion in the calcaneus. The MRI findings of a partial or complete rupure of the achilles tendon included enlarged and thickened achilles tendon （7 cases）, wavy lax achilles tendon（ 2 cases）, discontinuity of some or all of its fibers and intratendinous regions of increased signal intensity （ 7 cases ）. In the cases of complete tendon rupture, the size of the tendinous gap varied from 3.0--8.0 mm, which was filled with blood and appeared as edema of increase signal intensity on T2 WI and SPIR. In all 7 patients, MR scanning showed medium signal intensity（7 cases） on T1WI, or medium signal intensity （ 1 cases） , medium-high signal intensity （ 3 cases ） , high signal intensity（3 cases） on T2WI, and medium-high singnal intensity （ 2 cases）, high signal intensity （ 5 cases） on fat suppression MRI. The preaehilles fat pad showed obscure in 6 cases of complete achilles tendon rupture. Conclusion MRI is an excellent method for revealing achilles tendon rupture and confirming the diagnosis.