The aim of this study was to evaluate the elongation of the Achilles tendon by looking at the changing position of
Myo-Tendenious Junction (MTJ) using ultrasound during isometric contraction on an Isometric dynamometer.
A sequence of ultrasound images in the form of movie, obtained from a unit operating at a frequency of 12MHz
during isometric contraction, was analyzed offline using MATLAB to track the MTJ. This investigation has
implemented important techniques for in vivo feature extraction of Achilles tendon. Prior to feature extraction,
the images were filtered by anisotropic diffusion method and morphological enhancements. The cross correlation
search algorithm with an adaptive mask was utilized to track MTJ by comparing adjacent segmented frames.
The present method was studied on seventeen subjects, where it was able to measure the related movement
accurately.
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