Hamstring injuries have high recurrence rates in elite athletes, which motivates the investigations in novel diagnostic methods for muscle injury and follow-up. Diffusion tensor imaging facilitates direct and indirect monitoring of the muscle condition and architecture. Fiber orientations and changes therein due to injury or training are considered a key parameter; however, the assessment over the full volume of an individual muscle is still difficult. Therefore, we developed a method to generate reproducible quantitative fiber-angle color maps of the whole volume of leg muscles, which proved sensitive to changes due to muscle stretch and a training intervention.
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