A5058801449- Augmented Reality Applications
- Surgical Simulation and Training
- Anatomy and Medical Technology
- Soft Robotics and Applications
- Additive Manufacturing and 3D Printing Technologies
- Manufacturing Process and Optimization
- Additive Manufacturing Materials and Processes
- Medical Imaging and Analysis
- Traumatic Brain Injury and Neurovascular Disturbances
- Advanced Algorithms and Applications
- Robotics and Sensor-Based Localization
- Nasal Surgery and Airway Studies
- Power Line Inspection Robots
- Cerebrospinal fluid and hydrocephalus
- Advanced Machining and Optimization Techniques
- Hydraulic and Pneumatic Systems
- Advanced Surface Polishing Techniques
- Medical Image Segmentation Techniques
- Advanced machining processes and optimization
- Sinusitis and nasal conditions
Hirosaki University
2020-2025
Shanghai Institute of Technology
2024
This study proposes simulation-based surgical navigation concept and describes the development of a laparoscopic simulator that reflects motion instruments in real world. In proposed navigation, movements are captured by capture system, reflected virtual simulation time. Contact with organ model is detected based on signed distance field (SDF) made around model. The deformations organs caused contacts calculated using dynamic finite element method (FEM). Using cubic elastic object urethane...
Laparoscopic surgery is a widely used surgical technique, on the other hand, its high degree of difficulty makes it difficult for beginners to learn technique efficiently. In addition, recent working hour restrictions and shortages surgeons have resulted in insufficient training time, establishing efficiently methods becoming urgent needs. Therefore, promote skill proficiency novice surgeons, machine learning-based assessment system laparo-scopic skills was developed. A measurement with...
Abstract In addressing the phenomenon of chatter during machining thin-walled components, a strategy involving implementation continuous non-uniform toolpath has been proposed as remedy for suppression. The methodology commences with meticulous determination allowances, accomplished by utilizing fitting functions. Subsequently, stiffness coefficients and natural frequencies inherent to workpiece-tool system are extracted through modal analysis. A stability lobes diagram is formulated,...
Aiming at the chatter problem in finishing processes of integral impellers, a process optimization method continuous non-uniform allowance suppression based on least square was proposed: The used to fit modeling. stiffness coefficients and natural frequencies workpiece-tool system were obtained by modal analysis: According principles regenerative analysis, limit deep lobe graphs uniform margin blades stability region are established. It is proved stable diagram that blade can effectively...
In off-pump coronary artery bypass grafting (OPCAB), the arteries are joined as heart beats. This procedure requires high skill and experience to be performed reliably quickly. Although training kits commonly used for technical training, inability of trainees always with experienced surgeons guidance receive immediate evaluation remains problematic. To address this problem, a system that allows single trainee observe quantitatively evaluate procedures by an surgeon is being developed. study,...
The objective of this paper is to propose a numerical calculation method for vessel preservation simulations help brain surgeons in training techniques. Recently, neurosurgery simulators have been recognized as an effective tool surgical Vessel important neurosurgical technique. Brain vessels are nonlinear and they confined by arachnoid trabeculae the subarachnoid space. Proper tension forces acting on preservation, however, space structure has not considered previous studies. Accordingly,...
During neurosurgery, brain deformation occurs because of gravity and leakage the cerebrospinal fluid (CSF), which is referred to as shift. Brain shift a serious problem in neuronavigation relies on preoperatively taken medical images. This paper presents estimation method based hydrostatics dynamic FEM, assuming that CSF are main reasons for The accuracy proposed was verified via basic experiments conducted using elastic gelatin cubes. In addition, 3D model created preoperative images...
Endoscopic sinus surgery (ESS) is one of the standard minimally invasive surgical procedures for diseases a nasal cavity and paranasal sinuses. This paper describes development details surgeon skill classification system using machine learning. A learning model was generated based on features calculated from dynamic measurement data instruments in ESS enlarged volume as an indicator efficacy. By three algorithms, Support Vector Machine (SVM), PCA (Principal Component Analysis based)-SVM...
This paper describes the details of data correction method and feature extraction for skill evaluation practical laparoscopic surgical training. To analyze dexterity in training, motion capture (MoCap) based measurement system have been developed, experiment cadaver tranining were conducted. However, measured contains noise missing values, analysis is not possible without correction. For this background, outlier removal using Kalman filter other threshold-based applied. Linear interpolation...
In laparoscopic surgery, the problem is that endoscopic cameras have a narrow field of view and are often overlooked even if organs outside damaged. As support, surgical navigation systems present entire organ. However, because system uses preoperative medical images, difference between actual situation information presented by increases as surgery progresses. To solve this problem, in study, superimposing deformed intraoperative organ virtual model onto an image using mixed reality...
In laparoscopic surgery, current surgical navigation systems use preoperative medical images. The actual shape of organs and the image are different from each other due to deformation organ during operation. To solve this problem, our research group is developing an endoscopic surgery support system that can present intraoperative deformation. study, for system, 3D model constructed projected by projection mapping on surface a human body inside body. addition, full-scale liver was made soft...
A laparoscopic surgery is a minimally invasive that reduces the burden on patient. However, main disadvantage of narrowness field view provided by an endoscopic camera. Therefore, if organ damaged surgical instrument outside view, it easily overlooked. To support surgery, navigation systems have been developed so far. conventional provide information based preoperative medical images, and hence gaps between actual situation become larger as proceeds. This paper proposes method providing...