title: Augmented Endoscopic Images Overlaying Shape Changes in Bone Cutting Procedures.
abstract: In microendoscopic discectomy for spinal disorders, bone cutting procedures are performed in tight spaces while observing a small portion of the target structures. Although optical tracking systems are able to measure the tip of the surgical tool during surgery, the poor shape information available during surgery makes accurate cutting difficult, even if preoperative computed tomography and magnetic resonance images are used for reference. Shape estimation and visualization of the target structures are essential for accurate cutting. However, time-varying shape changes during cutting procedures are still challenging issues for intraoperative navigation. This paper introduces a concept of endoscopic image augmentation that overlays shape changes to support bone cutting procedures. This framework handles the history of the location of the measured drill tip as a volume label and visualizes the remains to be cut overlaid on the endoscopic image in real time. A cutting experiment was performed with volunteers, and the feasibility of this concept was examined using a clinical navigation system. The efficacy of the cutting aid was evaluated with respect to the shape similarity, total moved distance of a cutting tool, and required cutting time. The results of the experiments showed that cutting performance was significantly improved by the proposed framework.
authors: Graduate School of Informatics, Kyoto University, Yoshida Honmachi, Sakyo, Kyoto, Japan.
authors: Megumi
authors: http://orcid.org/0000-0002-5508-4366
authors: M
authors: Nakao
authors: Graduate School of Informatics, Kyoto University, Yoshida Honmachi, Sakyo, Kyoto, Japan.
authors: Shota
authors: S
authors: Endo
authors: Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan.
authors: Shinichi
authors: S
authors: Nakao
authors: Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan.
authors: Munehito
authors: M
authors: Yoshida
authors: Graduate School of Informatics, Kyoto University, Yoshida Honmachi, Sakyo, Kyoto, Japan.
authors: Tetsuya
authors: T
authors: Matsuda
mesh_terms: D001842:Bone and Bones / Q000000981:diagnostic imaging / Q000601:surgery*; D004724:Endoscopy; D006801:Humans; D008279:Magnetic Resonance Imaging; D025321:Surgery, Computer-Assisted; D014057:Tomography, X-Ray Computed