RAY-POS: a LIDAR-based assistance system for intraoperative repositioning of mobile C-arms without external aids. - Lukas Bernhard; Christopher Völk; Dominik Völk; Florian Rothmeyer; Zhencan Xu; Daniel Ostler; Peter Biberthaler; Dirk Wilhelm (Int. J. Comput. Assist. Radiol. Surg., 2022)