3D characterization of the triple-bundle Achilles tendon from in vivo high-field MRI
- Authors
- Cone, Stephanie G.; Kim, Hoon; Thelen, Darryl G.; Franz, Jason R.
- Issue Date
- Oct-2023
- Publisher
- Elsevier BV
- Keywords
- Achilles tendon; MRI; subtendon; triceps surae
- Citation
- Journal of Orthopaedic Research, v.41, no.10, pp 2315 - 2321
- Pages
- 7
- Journal Title
- Journal of Orthopaedic Research
- Volume
- 41
- Number
- 10
- Start Page
- 2315
- End Page
- 2321
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/25306
- DOI
- 10.1002/jor.25654
- ISSN
- 0736-0266
1554-527X
- Abstract
- The Achilles tendon consists of three subtendons that transmit force from the triceps surae muscles to the calcaneus. Individual differences have been identified in Achilles subtendon morphology and twist in cadavers, which may have implications for triceps surae mechanics and function. High-field magnetic resonance imaging (MRI) can be used to identify boundaries within multi-bundle tissues, which could then enable studies of subtendon structure-function relationships in humans. The objective of this study was to use high-field MRI (7T) to image and reconstruct Achilles subtendons arising from the triceps surae muscles. We imaged the dominant lower leg of a cohort of healthy human subjects (n = 10) using a tuned musculoskeletal sequence (double echo steady state sequence, 0.4 mm isotropic voxels). We then characterized the cross-sectional area and orientation of each subtendon between the MTJ and calcaneal insertion. Image collection and segmentation was repeated to assess repeatability. Subtendon morphometry varied across subjects, with average subtendon areas of 23.5 & PLUSMN; 8.9 mm(2) for the medial gastrocnemius, 25.4 & PLUSMN; 8.9 mm(2) for the lateral gastrocnemius, and 13.7 & PLUSMN; 5.9 mm(2) for the soleus subtendons. Repeatable subject-specific variations in size and position of each subtendon were identified over two visits, expanding on prior knowledge that high variability exists in Achilles subtendon morphology across subjects.
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Collections - College of Natural Sciences > Department of Sports Medicine > 1. Journal Articles
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