TY - RPRT TI - Validity of freehand three-dimensional ultrasound system in measurement of three-dimensional surface shape of shoulder muscles AU - Umehara, J. AU - Fukuda, N. AU - Konda, S. AU - Hirashima, M. PY - 2021 DO - 10.1101/2021.11.18.468912 UR - https://www.biorxiv.org/content/10.1101/2021.11.18.468912v1 ID - 10.1101/2021.11.18.468912 ER -