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Stable Real-Time surgical Cutting simulation of Deformable Objects Embedded with Arbitrary Triangular Meshes

Journal of Computer Science & Technology 2017年第6期32卷 1198-1213页

作者： Shi-Yu Jia Zhen-Kuan Pan Guo-Dong Wang Wei-Zhong Zhang Xiao-Kang Yu College of Computer Science and Technology Qingdao University Qingdao 266071 China

surgical simulators need to simulate deformation and cutting of deformable objects. Adaptive octree mesh based cutting methods embed the deformable objects into octree meshes that are recursively refined near the cutting tool trajectory. Deformation is only applied to the octree meshes; thus the deformation instability problem caused by degenerated elements is avoided. Biological tissues and organs usually contain complex internal structures that are ignored by previous work. In this paper the deformable objects are modeled as voxels connected by links and embedded inside adaptive octree meshes. Links swept by the cutting tool are disconnected and object surface meshes are reconstructed from disconnected links. Two novel methods for embedding triangular meshes as internal structures are proposed. The surface mesh embedding method is applicable to arbitrary triangular meshes, but these meshes have no physical properties. The material sub-region embedding method associates the interiors enclosed by the triangular meshes with physical properties, but requires that these meshes are watertight, and have no self-intersections, and their smallest features are larger than a voxel. Some local features are constructed in a pre-calculation stage to increase simulation performance. simulation tests show that our methods can cut embedded structures in a way consistent with the cutting of the deformable objects. Cut fragments can also deform correctly along with the deformable objects.

关键词： surgical simulation physically based modeling deformable object interactive cutting adaptive octree mesh

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Tree Structures Segmentation of Coronary Arteries Using CURVES Method for Interventional surgical simulation

Tree Structures Segmentation of Coronary Arteries Using CURV...

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第26届中国控制与决策会议

作者： Fan Yang Zengguang Hou Shaohua Mi Guibin Bian Xiaoliang Xie State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences

Visualization model of the coronary vasculature is of utmost importance for the diagnosis of the coronary heart diseases, as well as the planning and navigation of the intravascular surgery. To protect the cardiologists and operation staff against the ionizing radiation, surgical robots are designed and come to assist the practitioners during the interventional procedure. Robotic surgical simulation aims to provide effective, economic and convenient support for the learners with the surgical details as real as possible. In building this system, the geometric model of the blood vessels especially the coronary arteries are the key part of the virtual anatomic scenario. Because of the complex topologies,the segmentation of the coronary arteries is full of challenges. We developed in this paper a semi-automatic approach for this challenging work. The approach is based on an improved geodesic active contours model called ***, the region that contains the whole heart in the original images are completely extracted. Secondly, the extracted volumetric data is smoothed and thresholded in order to remove noises and irrelevant details. Next the image features are generated by calculating the gradients pixel-wisely, while the initial contours are generated by a modified fast marching method. Then the contour evolution is provoked to segment the boundaries of the coronary arteries. Finally the surface model is visualized after information is organized by using the marching cubes method. Experimental results showed the capability of the proposed approach in the segmentation of the coronary arteries tree.

关键词： Coronary arteries Segmentation CURVES surgical simulation

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Recent advances in computerized imaging and its vital roles in liverdisease diagnosis, preoperative planning, and interventional liversurgery: A review

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World Journal of Gastrointestinal Surgery 2023年第11期15卷 2382-2397页

作者： Paramate Horkaew Jirapa Chansangrat Nattawut Keeratibharat Doan Cong Le School of Computer Engineering Suranaree University of TechnologyNakhon Ratchasima 30000Thailand School of Radiology Institute of MedicineSuranaree University of TechnologyNakhon Ratchasima 30000Thailand School of Surgery Institute of MedicineSuranaree University of TechnologyNakhon Ratchasima 30000Thailand Faculty of Information Technology An Giang UniversityVietnam National University(Ho Chi Minh City)An Giang 90000Vietnam

The earliest and most accurate detection of the pathological manifestations of hepatic diseases ensures effective treatments and thus positive prognostic *** clinical settings,screening and determining the extent of a pathology are prominent factors in preparing remedial agents and administering approp-riate therapeutic ***,in a patient undergoing liver resection,a realistic preoperative simulation of the subject-specific anatomy and physiology also plays a vital part in conducting initial assessments,making surgical decisions during the procedure,and anticipating postoperative ***,various medical imaging modalities,e.g.,computed tomography,magnetic resonance imaging,and positron emission tomography,have been employed to assist in these *** fact,several standardized procedures,such as lesion detection and liver segmentation,are also incorporated into prominent commercial software *** far,most integrated software as a medical device typically involves tedious interactions from the physician,such as manual delineation and empirical adjustments,as per a given *** the rapid progress in digital health approaches,especially medical image analysis,a wide range of computer algorithms have been proposed to facilitate those *** include pattern recognition of a liver,its periphery,and lesion,as well as pre-and postoperative *** to clinical adoption,however,software must conform to regulatory requirements set by the governing agency,for instance,valid clinical association and analytical and clinical ***,this paper provides a detailed account and discussion of the state-of-the-art methods for liver image analyses,visualization,and simulation in the *** is placed upon their concepts,algorithmic classifications,merits,limitations,clinical considerations,and future research trends.

关键词： Computer aided diagnosis Medical image analysis Pattern recognition Artificial intelligence surgical simulation Liver surgery

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A new robot-assisted orthopedic surgery simulation system

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Journal of Harbin Institute of Technology(New Series) 2006年第3期13卷 258-262页

作者：吴冬梅杜志江贾志恒杨东海孙立宁 Robotics Institute Harbin Institute of Technology Harbin 150001 China

The paper proposes a novel desktop virtual surgical simulation system capable of not only surgical training but also operative planning, surgery rehearsal and telesurgery, which is mainly used on the robot-assisted orthopedic surgery system, HIT-RAOS. The paper first introduces the hardware system: HIT-RAOS. Then presents several major characters of the virtual system: developing tools, building schemes and collision detection algorithm. Additionally, virtual reality based telesurgery is implemented. Based on these works, experiments of locking of intramedullary nails are conducted, and results are content.

关键词： Virtual reality Java 3 D surgical simulation teleprogram

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Validation of a 3D-printed human temporal bone model for otology surgical skill training

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2021年第9期7卷 88-93页

作者： Wade W.Chien Melville J.da Cruz Howard W.Francis Department of Otolaryngology-Head&Neck Surgery Johns Hopkins School of MedicineBaltimoreMDUSA Department of Otolarynsology Westmeod HospitalSydneyAustralia Department of Surgery University of SydneySydneyAustralia Department of Otolaryngolosy-Head&Neck Sursery Duke University School of MedicineDurhamNCUSA

Hypothesis:Three-dimensional(3D)printed temporal bones are comparable to cadaveric temporal bones as a training tool for otologic ***:Cadaveric temporal bone dissection is an integral part of otology surgical ***,availability of cadaveric temporal bones is becoming much more limited and concern regarding chemical and biological risks *** this study,we examine the validity of 3D-printed temporal bone model as an alternative training tool for otologic ***:Seventeen otolaryngology trainees participated in the *** were asked to complete a series of otologic procedures using 3D-printed temporal bones.A semi-structured questionnaire was used to evaluate their dissection experience on the 3D-printed temporal ***:Participants found that the 3D-printed temporal bones were anatomically realistic compared to cadaveric temporal *** found that the 3D-printed temporal bones were useful as a surgical training tool in general and also for specific otologic ***,participants were enthusiastic about incorporation of 3D-printed temporal bones in temporal bone dissection training courses and would recommend them to other ***:3D-printed temporal bone model is a viable alternative to human cadaveric temporal bones as a teaching tool for otologic surgery.

关键词： Temporal bone Otologic surgery 3D-printing 3D-printed temporal bone surgical training surgical simulation

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3D Vector Reconstruction of the Typical Cervical Vertebra from Anatomical Sections of Korean Visible Human at the Laboratory of Clinical and Digital Anatomy of Paris Descartes University

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Forensic Medicine and Anatomy Research 2020年第3期8卷 55-63页

作者： Abdoulaye Kanté Jean Franç ois Uhl Mariam Daou Vincent Delmas J. S. Park B. S. Chung Babou Ba Nouhoum Ongoï ba Anatomy Laboratory University of Paris 5 Paris France Anatomy Laboratory University of Sciences Techniques and Technologies of Bamako Bamako Mali Department of Neurology Gabriel Touré University Hospital in Bamako Bamako Mali Department of Anatomy Dongguk University School of Medicine Dongguk Republic of Korea

Aim: To carry out a 3D vector reconstruction of the typical cervical vertebra from anatomical sections of the “Korean Visible Human” for educational purposes. Material and Methods: The anatomical subject was a 33-year-old Korean man who died of leukemia. He was 164 cm tall and weighed 55 kg. This man donated his body to science. Her body was frozen and cut into several anatomical sections after an MRI and CT scan. These anatomical sections were made using a special saw called a 0.2 mm thick cryomacrotome. Thus 8100 cuts were obtained. Only the sections numbered 940 to 1200 were used for our study. A segmentation by manual contouring of the different parts of the typical cervical vertebra was made using the software Winsurf version 3.5 on a laptop PC running Windows 7 equipped with a Ram of 8 gigas. Results: Our 3D vector model of the typical cervical vertebra is easily manipulated using the Acrobat 3DPDF interface. Each part of the vertebra accessible in a menu can be displayed, hidden or made transparent, and 3D labels are available as well as educational menus for learning anatomy. Conclusion: This original work constitutes a remarkable educational tool for the anatomical study of the typical cervical vertebra and can also be used as a 3D atlas for simulation purposes for training in therapeutic gestures.

关键词： Three-Dimensional Anatomy Korean Human Visible Modeling of the Typical Cervical Vertebra Virtual Reality 3D Reconstruction Virtual Dissection surgical simulation surgical Training

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CT-based Individualized Medical Implant Design

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Journal of Donghua University(English Edition) 2003年第3期20卷 46-50页

作者：叶铭朱晓峰王成焘孙坚 School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200030 Shanghai Second Medical University Shanghai 200025

Most implantation cases are implemented using implants selected from the available standard set, but in some cases, only those implants conforming to individual patient's skeletal morphology can serve the purpose. This paper proposes a new approach to design and fabricate custom-made exact-fit medical implants. With a real surgical case as the example,technical design details are presented; and three algorithms are given respectively for segmentation based on object features, triangular mesh defragmentation and mesh cutting.

关键词： 3D image segmentation Geometry modeling Rapid prototyping surgical simulation

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