Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Riichi Ouchida Last modified date:2022.05.06

Lecturer / Division of Fixed Prosthodontics Faculty of Dental Science Kyushu University / Oral Rehabilitation / Kyushu University Hospital


Papers
1. Kazuhiro Koikawa a, Kenoki Ohuchida a, *, Shin Takesue a, Yohei Ando a, Shin Kibe a, Hiromichi Nakayama a, Sho Endo a, Toshiya Abe a, Takashi Okumura a, Kohei Horioka a, Masafumi Sada a, Chika Iwamoto b, Taiki Moriyama a, Kohei Nakata a,
Yoshihiro Miyasaka a, Riichi Ohuchida c, Tatsuya Manabe a, Takao Ohtsuka a, Eishi Nagai a, Kazuhiro Mizumoto a, Makoto Hashizume b, Masafumi Nakamura , Pancreatic stellate cells reorganize matrix components and lead pancreatic cancer invasion via the function of Endo180 , Cancer Letters 412 (2018) 143e154 An international journal providing a forum for original and pertinent contributions in cancer research, 412, 143-154, 2018.03.
2. Masamichi Oka, Byunghyun Cho, Nozomu Matsumoto, Jaesung Hong, Misaki Jinnouchi, Riichi Ouchida, Shizuo Komune, Makoto Hashizume, Safe and rapid contouring of fibro-osseous lesions in the orbital area using navigation with minimally invasive cranial bone registration, 10.1017/S0022215114002412, 129, S62-S68, 2015.03.
3. Masamichi Oka, Byunghyun Cho, Nozomu Matsumoto, Jaesung Hong, Misaki Jinnouchi, Riichi Ouchida, Shizuo Komune, Makoto Hashizume, A preregistered STAMP method for image-guided temporal bone surgery, Int J CARS, Published online: 26 June 2013, 2013.06, Objectives Image-guided otological surgeries require min- imal invasiveness and high accuracy, and these two factors usually compete with each other. Our recently developed reg- istration method, called the STAMP method, showed mini- mal invasiveness with accuracy comparable to that of the current more invasive registration methods used in image- guided temporal bone surgery. However, surgeons perceived the STAMP method as complex and time-consuming. Methods We modified our STAMP method to further sim- plify the surgeon’s tasks in the operating room. We attached an optical tracking target on the STAMP plate and registered the plate in an IGS system before surgery, outside the oper- ating room. The registration was completed in the operating room by finishing the final simple task, which was to hold the preregistered STAMP plate still on the patient’s temporal bone. We tested this modified preregistered STAMP method in simulation surgery and actual surgeries. The registration times and errors of the STAMP method and preregistered STAMP method were compared.
Results The proposed new preregistered STAMP method significantly reduced the registration time in the operating room without compromising the registration accuracy. Conclusions The preregistered STAMP method signifi- cantly improved the original STAMP method in terms of time and convenience. It is now considered to be one of the easiest and quickest registrations for image-guided temporal bone surgery. Because most of the critical processes of reg- istration can be completed in the laboratory, the registration task in the operating room is therefore greatly simplified, thus allowing surgeons to concentrate more on the surgery itself..
4. Byunghyun Cho, Masamichi Oka, Nozomu Matsumoto, Riichi Ouchida, Jaesung Hong, Makoto Hashizume, Warning navigation system using real-time safe region monitoring for otologic surgery., Int J CARS, 8, 3, 395-405 , 2013.05, Purpose We developed a surgical navigation system that warns the surgeon with auditory and visual feedback to pro- tect the facial nerve with real-time monitoring of the safe region during drilling.
Methods Warning navigation modules were developed and integrated into a free open source software platform. To obtain high registration accuracy, we used a high-precision laser-sintered template of the patient’s bone surface to register the computed tomography (CT) images. We calcu- lated the closest distance between the drill tip and the sur- face of the facial nerve during drilling. When the drill tip entered the safe regions, the navigation system provided an auditory and visual signal which differed in each safe region. To evaluate the effectiveness of the system, we performed phantom experiments for maintaining a given safe marginPurpose We developed a surgical navigation system that warns the surgeon with auditory and visual feedback to pro- tect the facial nerve with real-time monitoring of the safe region during drilling.
Methods Warning navigation modules were developed and integrated into a free open source software platform. To obtain high registration accuracy, we used a high-precision laser-sintered template of the patient’s bone surface to register the computed tomography (CT) images. We calcu- lated the closest distance between the drill tip and the sur- face of the facial nerve during drilling. When the drill tip entered the safe regions, the navigation system provided an auditory and visual signal which differed in each safe region. To evaluate the effectiveness of the system, we performed phantom experiments for maintaining a given safe margin
Electronic supplementary material The online version of this article (doi:10.1007/s11548-012-0797-z) contains supplementary material, which is available to authorized users.
B. Cho · J. Hong · M. Hashizume Department of Advanced medical Initiatives, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
M. Oka · N. Matsumoto Department of Otorhinolaryngology, Kyushu University, Fukuoka, Japan
R. Ouchida Division of Fixed Prosthodontics, Faculty of Denstal Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
J. Hong (B) Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 50-1 Sang-ri, Hyeonpung-myeon, Dalseong-gun, Daegu 711-873, Republic of Korea e-mail: jhong@dgist.ac.kr
from the facial nerve when drilling bone models, with and without the navigation system. The error of the safe margin was measured on postoperative CT images. In real surgery, we evaluated the feasibility of the system in comparison with conventional facial nerve monitoring.
Results The navigation accuracy was submillimeter for the target registration error. In the phantom study, the task with navigation (0.7±0.25 mm) was more successful with smaller error, than the task without navigation (1.37 ± 0.39 mm, P < 0.05). The clinical feasibility of the system was con- firmed in three real surgeries.
Conclusions This system could assist surgeons in preserving the facial nerve and potentially contribute to enhanced patient safety in the surgery..
5. Nozomu Matsumoto, *†Masamichi Oka, †Byunghyun Cho, ‡kJaesung Hong, *Misaki Jinnouchi, §Riichi Ouchida, †Makoto Hashizume, and *Shizuo Komune, Cochlear Implantation Assisted by Noninvasive Image Guidance, Otology & Neurotology, Otology & Neurotology, 33, 8, 1333-1338, 2012.09, Objective: We recently developed a new noninvasive registra- tion method for image-guided otologic surgery (STAMP method). We investigated the benefit and potential drawback of our new method in clinical application and tested the feasibility of routine image-guided surgery.
Study Design: Retrospective case review. Setting: Tertiary referral university hospital. Patients: Forty-six cases (45 patients) that underwent cochlear implantation in Kyushu University Hospital during the period of 2007 and 2010 were informed of the option to use navigated surgery. Intervention: Twenty-five cochlear implantations were per- formed using STAMP-registered image-guided surgery.
Image-guided surgery (IGS) shows the location of surgical devices on the patient’s radiographic images and gives feedback to the surgeon. The use of IGS is con- sidered to improve the completeness of the surgery while securing patient’s safety (1,2). In the head and neck, IGS is popular in endoscopic sinus and skull base surgery. The former is rather less invasive, and surgeons do not choose invasive registration process on this surgery, but at the same time, the required accuracy is modest, less than 3 to 4 mm being acceptable (3). The latter is invasive, some- times life threatening; hence, some degree of invasive- ness to meet higher accuracy requirement of less than 1 to
Address correspondence and reprint requests to Nozomu Matsumoto, M.D., Ph.D., Department of Otorhinolaryngology Graduate School of Medical Sciences, Kyushu University 3-1-1 Maidashi Higashi-ku Fukuoka 812-8582, Japan; E-mail: matunozo@med.kyushu-u.ac.jp
This study was supported by Grant-in-Aid for Young Scientists (A) No. 20689031 from Japan Society for the Promotion of Science for N. M. Conflicts of interest and source of funding: N. M. is a coapplicant of a patent related to STAMP method, and thus, the authors declare this fact as a potential conflict of interest. The other authors declare no
conflicts of interest.
Main Outcome Measure: The error of image-guided surgery and time of surgery were collected and analyzed. Results: STAMP method offered serviceable accuracy in 18/25 cochlear implantations. The learning curve suggested that the accuracy is at least stabilizing, if not improving, and the success rate is expected to rise. Time of cochlear implant surgery was not significantly extended by the use of image guidance. Conclusion: STAMP method had comparable errors with minimal invasiveness. Our new method potentially enables routine use of image-guided surgery. Key Words: Cochlear implantVImage-guided surgeryVSurgical navigation.
Otol Neurotol 33:1333Y1338, 2012..
6. Hong J, Matsumoto N, Ouchida R, Komune S, Hashizume, Medical Navigation System for Otologic Surgery Based on Hybrid Registration and Virtual Intraoperative Computed Tomography, IEEE Transactions on Biomedical Engineering vol.56, No.2, February, pp426-432 2009, vol.56, No.2, February, pp426-432 2009, 2009.02.
7. Hong J, Matsumoto N, Ouchida R, Komune S, Hashizume M,, Image-guided Otologic Surgery based on Patient Motion Compensation and Intraoperative Virtual CT, , Proceedings of ACCAS 2007, no. P110064(CD), 2007, 2008.05.