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Friday, October 8, 2010, 14:50-15:10Session B13: Imaging TechnologyObservation of 3D Image Preoperative Planning in the Operation TheaterUsing 3-Dimensional Display Without Goggles*Hirotaka Iguchi - Nagoya City University - Nagoya, JapanNobuyuki Watanabe - Nagoya City University - Nagoya city, JapanNobuhiko Tanaka - Nagoya City University - Nagoya, JapanSinn'ichi Hasegawa - Nagoya City University - Nagoya, JapanSatona Murakami - Nagoya City University - Nagoya City, JapanKaneaki Tawada - Department of Arthroplastic Medicine, Nagoya City University - Nagoya,JapanMasahito Yoshida - Nagoya city university - Nagoya, JapanGen Kuroyanagi - Nagoya East Medical Center - Nagoya, JapanAtsunori Murase - Naogya East Medical Center - Nagoya, JapanYasuhiro Nishimori - Nagoya City University - Nagoya, Japan*Email: iguchi@med.nagoya-cu.ac.jpWe have been using 3-dimensional CAD software for preoperative planning as a desktop tooldaily. In ordinary cases, proper size stems and cups can be decided without much labor but inour population, many arthritic hip cases have dysplastic condition and they often come to see usfor hip replacement after severe defects were created over the acetabulum. It is often the casethat has Crowe’s type III, IV hips with leg length difference. For those cases preoperativeplanning using 3D CAD is a very powerful tool.Although we only have 2-dimensional display with our computer during preoperative planning,3 dimensional geometries are not so difficult to be understood, because we can turn the objectswith the mouse and can observer from different directions. We can also display their sectionsand can peep inside of the geometries. It is quite natural desire that a surgeon wishes to see theplaned geometries as a 3-dimensional materials. For some complicated cases, we had preparedplastic model and observed at the theater for better understanding. When we ask for a modelservice, each model costs $2,500. We also have small scale desk top rapid processing tool too,however it takes 2 days to make one side of pelvis. Observation of the geometries using 3-dimensional display can be its substitute without much cost and without taking much time. Theproblem of using 3D display had been the special goggle to mask either eye alternatively.In the present paper, we have used a 3D display which has micro arrays of powerful prism toderiver different image for each eye without using any goggle.MethodAfter preoperative planning, 2 images were prepared for right eye and left eye giving 2-3degree’s parallax. These images were encoded into a special AVI file for 3-dimensionaldisplay. To keep fingers away from the device, several scenes were selected and 3-dimensionalslide show was endlessly shown during the surgery.file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]