Scapular location measurement using motion capture-tracked ultrasound probes

Ultrasonic imaging is a safe, established and non-invasive method to visualize the position of tissues within the body. Coupling existing skin mounted motion capture markers to ultrasound sensors could allow for precise measurement of bone position and orientation, without the loss in accuracy due to relative displacement between skin and bone that is present in standard motion capture techniques. Previously, we have shown that the use of 3 ultrasound sensors can reduce error to submillimeter levels in silico [1]. This work furthers the concept, demonstrating its feasibility in in vitro conditions.