Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Göteborgsvägen 31, 431 80, Gothenburg, Sweden.
Department of Musculoskeletal Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden.
Sci Rep. 2020 Oct 1;10(1):16348. doi: 10.1038/s41598-020-73345-0.
The aim of the study was to check if the subtendons of the Achilles tendon can be identified in vivo on MRI in the midportion of the tendon. The relation of the plantaris tendon to the Achilles tendon was also examined. A retrospective study of 200 MRI of ankle joints including the Achilles tendon was conducted. Statistical analysis of the correlation between the possibility of identifying the subtendons and the side, gender, presence of the central soleus tendon and plantaris tendon variation was performed. The inter-observer agreement between two reviewers in their evaluation of the subtendons was assessed using kappa statistics. The subtendon from the lateral head of the gastrocnemius muscle was identified in 65% (k = 0.63) and was located in the anterior part of the Achilles tendon. The subtendon from the soleus muscle was recognized in 12% (k = 0.75) comprising anterior part of the tendon. In 6% the subtendon from the medial head of the gastrocnemius muscle was identified (k = 0.58). The central soleus tendon was identified in 85% of cases. Statistical analysis shows the weak correlation of the presence of the central soleus tendon and the possibility of identifying the subtendon from the soleus muscle. The plantaris tendon was directly related to the insertion of the Achilles tendon in 42.5%. Identification of the subtendons of the Achilles tendon on MRI is challenging, and most often it is only possible to find the subtendon of the lateral head of the gastrocnemius muscle.
本研究旨在检查跟腱中腱中部的副腱能否在 MRI 上活体识别。还检查了比目鱼肌腱与跟腱的关系。对包括跟腱在内的 200 例踝关节 MRI 进行了回顾性研究。对识别副腱的可能性与侧别、性别、中央比目鱼肌腱和比目鱼肌腱变异的关系进行了统计学分析。两位审阅者评估副腱时的观察者间一致性采用 Kappa 统计进行评估。外侧头腓肠肌的副腱在 65%（k=0.63）的病例中被识别，位于跟腱的前部分。比目鱼肌的副腱在 12%（k=0.75）的病例中被识别，构成了肌腱的前部分。6%的病例识别出了内侧头腓肠肌的副腱（k=0.58）。中央比目鱼肌腱在 85%的病例中被识别。统计分析显示，中央比目鱼肌腱的存在与识别比目鱼肌副腱的可能性之间存在弱相关性。比目鱼肌腱与跟腱的插入点直接相关，占 42.5%。MRI 上识别跟腱副腱具有挑战性，通常只能找到外侧头腓肠肌的副腱。
