Keywords: Tendon/Ligament, Quantitative Imaging, T2*, Bi-exponential, UTE, CONES
Motivation: Tendon laxity, which may cause skeletal maltracking, can lead to pain and increased injury risk. Non-invasive measurement of tendon laxity remains a challenge but Ultrashort echo time (UTE)-T2* mapping may serve as a potential evaluation method.
Goal(s): This study aims to evaluate the sensitivity and repeatability of UTE-T2* mapping to tendon laxity.
Approach: We scanned the Achilles tendons of human subjects under tension and relaxation using UTE sequences.
Results: T2* relaxation times seemed to decrease as tendon load increased, from plantar flexion to dorsiflexion. However, the changes observed were small and intra-subject variability with position did not show any specific trends.
Impact: As the changes in T2* relaxation times were small and showed poor reproducibility, UTE-T2* mapping may not be sensitive enough to changes in tendon tensile loading and laxity.
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