Transrectal ultrasound image-based real-time augmented reality guidance in robot-assisted laparoscopic rectal surgery: a proof-of-concept study. - Jun Shen 007; Nabil Zemiti; Christophe Taoum; Guillaume Aiche; Jean-Louis Dillenseger; Philippe Rouanet; Philippe Poignet (Int. J. Comput. Assist. Radiol. Surg., 2020)