A5040816477- Anatomy and Medical Technology
- Surgical Simulation and Training
- Medical Imaging and Analysis
- Augmented Reality Applications
- Advanced Neuroimaging Techniques and Applications
- Medical Image Segmentation Techniques
- Reproductive Biology and Fertility
- Facial Nerve Paralysis Treatment and Research
- Fetal and Pediatric Neurological Disorders
- Intracranial Aneurysms: Treatment and Complications
- Virtual Reality Applications and Impacts
- Radiomics and Machine Learning in Medical Imaging
- Advanced MRI Techniques and Applications
- Health Promotion and Cardiovascular Prevention
- Mental Health Treatment and Access
- Dental Radiography and Imaging
- COVID-19 and Mental Health
- EEG and Brain-Computer Interfaces
- Sperm and Testicular Function
- Digital Mental Health Interventions
- Medical Imaging Techniques and Applications
- Neuroscience and Neural Engineering
- Computer Graphics and Visualization Techniques
- Ovarian function and disorders
- Meningioma and schwannoma management
The University of Tokyo
2014-2023
Tokyo University of Information Sciences
2004-2021
Tokyo University of the Arts
2017
National Center For Child Health and Development
2010
Telecommunications Advancement Foundation
2003
Kanagawa University
2003
Yamagata University
1992-2001
Abstract The surgical education environment has been changing significantly due to restricted work hours, limited resources, and increasing public concern for safety quality, leading the evolution of simulation-based training in surgery. Of various simulators, low-fidelity simulators are widely used practice skills such as sutures because they portable, inexpensive, easy use without requiring complicated settings. However, since do not offer any teaching information, trainees self-practice...
Existing self-training materials are insufficient to learn open surgical procedures, and a new system that provides three-dimensional procedural information is needed. The effectiveness usability of providing by augmented reality (AR) were compared those an existing system, instructional video, in self-learning suturing surgery.This was prospective, evaluator-blinded, randomized, controlled study. Medical students who novices randomized into 2 groups: practice with the AR training (AR group)...
Abstract BACKGROUND A virtual reality simulator for aneurysmal clipping surgery is an attractive research target neurosurgeons. Brain deformation one of the most important functionalities necessary accurate and vastly affected by status supporting tissue, such as arachnoid membrane. However, no implementing tissue brain has yet been developed. OBJECTIVE To develop a possessing interactive deforming capability closely dependent on dissection apply it to clinical cases. METHODS...
The authors assessed whether the combined use of diffusion tensor tractography (DTT) and contrast-enhanced (CE) fast imaging employing steady-state acquisition (FIESTA) could improve accuracy predicting courses facial cochlear nerves before surgery.The population was composed 22 patients with vestibular schwannoma in whom both be identified during surgery. According to DTT, depicted fibers running from internal auditory canal brainstem were judged represent or vestibulocochlear nerve. With...
Public stigma against depression contributes to low employment rates among individuals with depression. Contact-based educational (CBE) interventions have been shown reduce this public stigma.We investigated the ability of our Virtual Reality Antistigma (VRAS) app developed for CBE depression.Sixteen medical students were recruited and randomized 1:1 intervention group, who used VRAS (VRAS group), control watched a video on The score was assessed using Depression Stigma Scale (DSS)...
Successful resection of hemangioblastoma depends on preoperative assessment the precise locations feeding arteries and draining veins. Simultaneous 3D visualization arteries, veins, surrounding structures is needed. The present study evaluated usefulness high-resolution multifusion medical imaging (hr-3DMMI) for planning hemangioblastoma. hr-3DMMI combined MRI, MR angiography, thin-slice CT, rotated angiography. Surface rendering was mainly used creation using multiple thresholds to create...
Abstract Head CT, which includes the facial region, can visualize faces using 3D reconstruction, raising concern that individuals may be identified. We developed a new de-identification technique distorts of head CT images. images were distorted labeled as "original images" and others "reference images." Reconstructed face models both created, with 400 control points on surfaces. All voxel positions in original image moved deformed according to deformation vectors required move corresponding...
To determine the best equilibration time in cryoprotectant before rapid cooling, 8-cell mouse embryos were exposed to a vitrification solution containing ethylene glycol, Ficoll and trehalose modified phosphate-buffered saline at 5 degrees C for varying periods of time. They frozen using an ultra freezing method, thawed 20 water bath cultured 24 h with 5-bromo-2-deoxyuridine. Embryo development number sister chromatid exchanges, sensitive indicator genetic damage, observed. The results...
An interactive method for segmentation and isosurface extraction of medical volume data is proposed. In conventional methods, users decompose a into multiple regions iteratively, segment each region using threshold, then manually clean the result by removing clutter in region. However, this tedious requires many mouse operations from different camera views. We propose an alternative approach whereby user simply applies painting to tools commonly seen systems, such as flood fill brushes. This...
Three-dimensional (3D) computer graphics (CG) are useful for preoperative planning of neurosurgical operations. However, application 3D CG to intraoperative navigation is not widespread because existing commercial operative systems do show in sufficient detail. We have developed a microscopic optically tracking system that uses high-resolution CG. This article presents the technical details our system. Our consists three components: microscope, registration, and image display An optical...
Research attempting to merge human and mechanical systems through a nervous system is one of the most dynamic fields in interface technology. Recently, artificial cochlear retinal nerves were connected via system. However, there has been no report concerning replacement tactile sensation by sensors sensory nerve The present study reports development which enables touch strength applied robot hand be sensed operator microstimulation method. controls grasping action equipped with at remote...
Social dominance, in which an individual asserts control over others or benefits most after social conflict, has influence on behaviour. However, the mechanisms mediating dominance remain unclear. within groups determines distribution of rewards such as food and access to mating partners, can act reinforcers. In this study, we used water competition test determine whether mice were dominant subordinate. It been previously reported that heterozygous for a missense mutation Grin1 (Grin1Rgsc174...
In neurosurgery, it is important to inspect the spatial correspondence between preoperative medical image (virtual space), and intraoperative findings (real space) improve safety of surgery. Navigation systems related modalities have been reported as methods for matching this correspondence. However, because influence brain shift accompanying craniotomy, registration accuracy reduced. present study, overcome these issues, we developed a spatially accurate method fusion 3-dimensional computer...
Image-guided systems improve the safety, functional outcome, and overall survival of neurosurgery but require extensive equipment.To develop an image-guided surgery system that combines brain surface photographic texture (BSP-T) captured during with 3-dimensional computer graphics (3DCG) using projection mapping.Patients who underwent initial tumors were prospectively enrolled. The 3DCG (3DCG-T) was obtained from under similar conditions as those when capturing photographs. position...
Background: The wall-to-lumen ratio (WLR) is an important parameter in vascular medicine because it indicates the character of wall as well degree stenosis. Despite advances medical imaging technologies, still difficult to measure thin-walled normal intracranial arteries, and reports on WLR artery are limited. It might be possible calculate using indocyanine green (ICG) angiography, which used observe vessels during microsurgery. Purpose: To evaluate arteries ICG angiography. Materials...
Purpose : To evaluate a new method that registers phase-contrast magnetic resonance angiography images to time-of-flight images. Methods Magnetic datasets of 10 healthy volunteers obtained by using two modalities (phase-contrast and angiography) were preprocessed. Specifically, vessel regions extracted the region growing with threshold 10% signal intensity maximum or 50% for images, respectively. Then, normalized mutual information was used determine spatial positions, registration between...