Data for article "Muscle-tendon unit length measurement using 3D ultrasound"

This dataset contains data from a study whose two aims were: to assess MTU length and length change of the main human lower limb bi-articular muscles using 3D freehand ultrasound (US) for different joint configurations (shortened, lengthened, a combination of shortened and lengthened involving both joints, neutral and standing) and to compare these measurements with the predicted results of a 2016 generic model that used the extensible software package OpenSim. to develop participant-specific OpenSim models, based on 3D US measurements of insertions and paths, to improve the inter-individual variation errors compared with the aforementioned generic model. It contains the following files relating to 14 subjects (folders S01 to S14). MTU length was computed using OpenSim with three different models: OS (the generic OpenSim scaled model), OS + INSER (OS with personalized 3D US MTU insertions), and OS + INSER + PATH (OS with personalized 3D US MTU insertions and path obtained from one posture). A 3D US pipeline was developed and validated to estimate the MTU length from a limited number of measurements. See the README and associated article for more details.