title: 3-D augmented reality for MRI-guided surgery using integral videography autostereoscopic image overlay.
abstract: A 3-D augmented reality navigation system using autostereoscopic images was developed for MRI-guided surgery. The 3-D images are created by employing an animated autostereoscopic image, integral videography (IV), which provides geometrically accurate 3-D spatial images and reproduces motion parallax without using any supplementary eyeglasses or tracking devices. The spatially projected 3-D images are superimposed onto the surgical area and viewed via a half-silvered mirror. A fast and accurate spatial image registration method was developed for intraoperative i.v. image-guided therapy. Preliminary experiments showed that the total system error in patient-to-image registration was 0.90 +/- 0.21 mm, and the procedure time for guiding a needle toward a target was shortened by 75%. An animal experiment was also conducted to evaluate the performance of the system. The feasibility studies showed that augmented reality of the image overlay system could increase the surgical instrument placement accuracy and reduce the procedure time as a result of intuitive 3-D viewing.
authors.affiliation: Department of Bioengineering, Graduate School of Engineering, and Translational Systems Biology and Medicine Initiative, University of Tokyo, Tokyo 113-8656, Japan. liao@bmpe.t.u-tokyo.ac.jp
authors.forename: Hongen
authors.initials: H
authors.lastname: Liao
authors.forename: Takashi
authors.initials: T
authors.lastname: Inomata
authors.forename: Ichiro
authors.initials: I
authors.lastname: Sakuma
authors.forename: Takeyoshi
authors.initials: T
authors.lastname: Dohi
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D010780:Photogrammetry / Q000295:instrumentation*; D012680:Sensitivity and Specificity; D013382:Subtraction Technique / Q000295:instrumentation*; D025321:Surgery, Computer-Assisted / Q000295:instrumentation*; D014584:User-Computer Interface; D014741:Video Recording / Q000295:instrumentation*