Utility of real-time 3D visualization system in the early stage of phacoemulsification training

●AIM:To determine the teaching effects of a real-time three dimensional(3D)visualization system in the operating room for early-stage phacoemulsification training.●METHODS:A total of 10 ophthalmology residents of the first-year postgraduate were included.All the residents were novices to cataract surgery.Real-time cataract surgical observations were performed using a custom-built 3D visualization system.The training lasted 4wk(32h)in all.A modified International Council of Ophthalmology’s Ophthalmology Surgical Competency Assessment Rubric(ICO-OSCAR)containing 4 specific steps of cataract surgery was applied.The self-assessment(self)and expert-assessment(expert)were performed through the microsurgical attempts in the wet lab for each participant.●RESULTS:Compared with pre-training assessments(self 3.2±0.8,expert 2.5±0.6),the overall mean scores of posttraining(self 5.2±0.4,expert 4.7±0.6)were significantly improved after real-time observation training of 3D visualization system(P<0.05).Scores of 4 surgical items were significantly improved both self and expert assessment after training(P<0.05).●CONCLUSION:The 3D observation training provides novice ophthalmic residents with a better understanding of intraocular microsurgical techniques.It is a useful tool to improve teaching efficiency of surgical education.

Application of 3D Visual Techniques in Daliuta Coal Mine

3D visualization is one of major problems in “Digital Mine” theory and its technological research field. Through the observation of 3D geological models, spatial structural information, connected with the information of production management hidden in geological data, could be detected. In order to meet the requirement of more efficient coal exploration, a case study of geological characters of the Daliuta Coal Mine is presented in which 3D visual models of the ground surface and geologic bodies are established on the basis of data models and data structures of 3D geology modeling. The main conclusions of this study are as follows: (1) Through analysis and organization of spatial discrete data, the drillhole database is designed with the data of the Daliuta mine; the connections amomg drillhole data are real- ized and displayed in a 3D environment. (2) Combining real data of the Daliuta mine, drillhole visualization is realized in a 3D environment by using the CoalMiner system. (3) The ground surface modeling of the Daliuta coal mine adopted a surface-data model and a TIN data structure. (4) 3D models of coal seams and rock formations of the Daliuta mine are established, which provide a method for the simulation of complex surfaces of geologic bodies. In the end, the models are applied to the Daliuta coal mine and the result shows that better geological effects are obtained.

Application examples of 3D visual interpretation technology in Dagang Oilfield

3D visualization technology is a new seismic interpretation technology that is completely different from traditional seismic data interpretation technologies. This method takes geologic bodies or any 3D region of interest as a unit and integrates the points, lines, and planes of the bodies to make a 3D visual interpretation. This technology can be integrated with the coherence technique to interpret complex faults. Spatial domain automatic horizon tracing can accurately determine structural features. Target sculpting can determine the spatial dimensions and depth extent of perspective 3D lithology bodies using inversion data. I applied this technology to the interpretation of the complex block structures in the Guanxi area of Dagang Oilfield and the prediction of subtle reservoirs in the western slope of the Qinan sag with good results. This study indicated that the visual interpretation technology can be widely and effectively applied in oil field development and to improve the exploration success ratio.

Survey on computational 3D visual optical art design

Visual arts refer to art experienced primarily through vision.3D visual optical art is one of them.Artists use their rich imagination and experience to combine light and objects to give viewers an unforgettable visual experience.How-ever,the design process involves much trial and error;therefore,it is often very time-consuming.This has prompted many researchers to focus on proposing various algorithms to simplify the complicated design processes and help artists quickly realize the arts in their minds.To help computer graphics researchers interested in creating 3D visual optical art,we first classify and review relevant studies,then extract a general framework for solving 3D visual optical art design problems,and finally propose possible directions for future research.

The establishment of 3D visualization modeling for the jointed slope

The 3D visualization model of slop with structural plane can displayed the characters of structural plane in slop directly, and illustrated the spatial combination. It is a modem and critical question in the field of geotechnical engineering. Based on the peculiarity of the reconnaissance and the research of the visualization by formers, systemized the method fit for building 3D visualization model of slop with structural plane. Write the special program with Visual C^-＋ computer language and illustrated it by OpenGL, the program can displayed and captured the random section plane. The program has a satisfied result by proving with the real projects.

The Application of 3D Visualization Technology in the Construction of Water Conservancy and Hydropower

This paper put forward the structure and construction process of three-dimensional visualization of hydroelectric construction system model based on GIS and 3D visualization platform. The paper first describes the 3D visualization based on GIS, then discusses the method of constructing 3D visual digital model, and then introduces the terrain digital technology, feature modeling technology. Finally, the technical route shows that this method has good practicability.

Research on 3D visualization design system of hydraulic culvert

The conventional 2D design method of culverts separated from 3D model cannot directly visualize the process of creating and renewal process. This paper explores graphics application framework of Open GL based on MFC, developing the 3D visualization system of hydraulic culvert. This system effectively integrats with building design, structural design and parametric design and image processing technology. The results can be shown by 3D visualization design.

Calculation and Management for Mining Loss and Dilution under 3D Visualization Technical Condition

The mining loss rate and dilution rate are the key indicators for the mining technology and management level of mining enterprises. Aiming at the practical problems such as the large workload but inaccurate data of the traditional loss and dilution calculation method, this thesis introduces the operating principle and process of calculating the loss rate and dilution rate at the mining fields by adopting geological models. As an example, authors establishes 3D models of orebody units in the exhausted area and mining fields in Yangshu Gold Mine in Liaoning Province, and conduct Boolean calculation among the models to obtain the calculation parameters of loss and dilution, and thereby calculate out the dilution rate and loss rate of the mining fields more quickly and accurately.

Moderate Interpretation with Attribute Analysis and 3d Visualization for Deeper Prospects of Balkassar Field, Central Potwar, Upper Indus Basin, Pakistan

Balkassar is an old field with considerable remaining potential. The 2d, 3d seismic and earlier vintages show that Balkassar is composed of two folds that impart heart shaped geometry. It appears likely the early Eocene age Bhadrar formation may provide commercial production with lower water cuts from the eastern lobe (yet untapped) of the structure that may have at least 30 million barrels of unrecovered oil. Horizontal drilling may have promise as an optimum technique for recovery of oil from Paleogene reservoirs. Encouraging oil indications have also been recorded from the early Permian age tobra formation from Balkassar oxy-1 that was not tested by Oxy. Tobra sandstone reservoir can have a matrix porosity approaching 8%. When fractured recoveries from it can be relatively better than the Paleogene reservoirs. The 2D and 3D seismic acquisition has confirmed that the eastern lobe (yet untapped) of the Balkassar field is structurally higher and steeper than the Western lobe which has thus far produced over 30 million barrels. The Eastern lobe thus offers good potential for recovery of oil from the Bhadrar reservoir. The entire field is likely to have potential for recovery of oil from the early Eocene aged Tobra formation. 2-d and 3-D Seismic data interpretation, attribute analysis and visualization for deeper prospect carried in Balksasar field. Tobra and Khewra formation studied for deeper potential drilling. Time contour and depth contour map shows potential for deeper prospects. Also attribute analysis and 3d visualization show good results for deeper potential of Tobra and Khewar formations. Seismic amplitude, Reflection strength, Apparent polarity attribute are visualized and interpreted to find the potential for Tobra and Khewra formation. 3-D visualization also showed positive results for Tobra and Khewra formations.

3D visualization of the material flow in friction stir welding process

The material flow in friction stir welded 2014 Al alloy has been investigated using a marker insert technique （MIT）. Results of the flow visualization show that the material flow is asymmetrical during the friction stir welding （FSW） process and there are also significant differences in the flow patterns observed on advancing side and retreating side. On advancing side, some material transport forward and some move backward, but on retreating side, material only transport backward. At the top surface of the weld, significant material transport forward due to the action of the rotating tool shoulder. Combining the data from all the markers, a three-dituensional flow visualization, similar to the 3D image reconstruction technique, was obtained. The three-dimensional plot gives the tendency chart of material flow in friction stir welding process and from the plot it can be seen that there is a vertical, circular motion around the longitudinal axis of the weld. On the advancing side of the weld, the material is pushed downward but on the retreating side, the material is pushed toward the crown of the weld. The net result of the two relative motions in both side of the advancing and the retreating is that a circular motion comes into being. Comparatively, the material flow around the longitudinal axis is a secondary motion.

Two-Dimensional Medical Image 3D Visualization System’s Realization

With the development of virtual reality application in the medical field, two-dimensional medical image of the three-dimensional visualization technology made possible. Surgery gets into minimally invasive operation microscopy Era, and gradually becomes a new research hotspot. This paper studies the realization of two-dimensional medical im-age 3D reconstruction visualization system method, and the overall process and management module. Using the main technology of VTK (The Visualization Toolkit) to achieve a two-dimensional medical image three-dimensional visua-lization system, which can help the physician to obtain help clinical diagnosis Information and play an important role in treatment, accurate positioning in diseased tissue and tumor early diagnosis.

Immersive 3D Visualization of the Collective Behavior of Particles and Crystal Dislocations Using Virtual Reality Technology

In this article, we present a three-dimensional visualization technique that has been developed in order to establish an interactive immersive environment to visualize the particles in granular materials and dislocations in crystals. Simple elementary objects often exhibit complex collective behavior. Understanding of such behaviors and developments of coarse-scale theories, often requires insight into collective behavior that can only be obtained through immersive visualization. By displaying the computational results in a virtual environment with three-dimensional perception, one can immerse inside the model and analyze the intricate and very complex behavior of individual particles and dislocations. We built the stereographic images of the models using OpenGL rendering technique and then combine with the Virtual Reality technology in order to immerse in the three-dimensional model. A head mounted display has been used to allow the user to immerse inside the models and a flock of birds tracking device that allows the movements around and within the immersive environment.

3D Visualization在蓄电池巡检系统中的应用研究

近年来随着蓄电池巡检系统在相关行业的广泛应用,针对安装地理环境复杂、监测对象数量众多的应用场合,阐述了3D Visualization技术的独特优势,并设计了基于3D Visualization技术的蓄电池巡检系统的上位机软件方案。

CBL联合3D Slicer可视化教学在医学生神经外科实习中的应用

目的:探讨CBL联合3D Slicer软件可视化教学在医学生神经外科实习中的应用价值。方法:选取2020年1月至2021年7月在台州第一人民医院神经外科轮转的60名实习医师,随机分为试验组和对照组,对照组进行CBL教学,试验组进行CBL联合3D Slicer软件可视化教学,实习结束对两组学生实施出科考试和满意度问卷调查,并对比研究。结果:试验组出科考试中理论考试、现场答辩及综合成绩明显优于对照组。在满意度调查中,试验组在学习兴趣的提升、三维空间思维能力的提升、临床思维能力的提升、创造性思维能力的提升、自主学习能力的提升以及整体满意度明显优于对照组(P<0.05)。结论:CBL联合3D Slicer可视化教学在神经外科实习教学中取得了较好成效,可明显提升教学效果和满意度,值得在基层教学医院推广。

3D成像系统在住培医师肝脏Couinaud分段学习中的应用

目的探讨3D(三维重建技术)成像系统在住院医师规范化培训(简称住培)医师肝脏Couinaud分段教学中的价值。方法选取2020年7月—2022年6月西安交通大学第二附属医院普通外科60名住培医师作为研究对象,随机分为对照组(n=20)、试验组1(n=20)和试验组2(n=20)。对照组采用阅读CT二维图像进行Couinaud分段教学;试验组1先二维图像后三维图像进行此教学;试验组2先三维图像后二维图像进行此教学。住培医师对Couinaud分段和满意度进行评价。结果试验组1和试验组2 Couinaud分段8段的准确率优于对照组,差异有统计学意义(P<0.001);试验组1和试验组2回答所有问题所需的时间[(10.80±1.94)min、(8.60±1.79)min]少于对照组[(16.45±1.76)min],且两试验组对比,差异有统计学意义(P<0.05)。试验组1和试验组2对Couinaud分段理解度及教学方法满意度高于对照组,差异有统计学意义(P<0.001)。结论基于3D成像系统的教学方法,可提升住培医师对肝脏Couinaud分段为基础的肝脏解剖的理解能力和实践能力,取得满意的教学效果。

Intelligent 3D garment system of the human body based on deep spiking neural network

Background Intelligent garments,a burgeoning class of wearable devices,have extensive applications in domains such as sports training and medical rehabilitation.Nonetheless,existing research in the smart wearables domain predominantly emphasizes sensor functionality and quantity,often skipping crucial aspects related to user experience and interaction.Methods To address this gap,this study introduces a novel real-time 3D interactive system based on intelligent garments.The system utilizes lightweight sensor modules to collect human motion data and introduces a dual-stream fusion network based on pulsed neural units to classify and recognize human movements,thereby achieving real-time interaction between users and sensors.Additionally,the system incorporates 3D human visualization functionality,which visualizes sensor data and recognizes human actions as 3D models in real time,providing accurate and comprehensive visual feedback to help users better understand and analyze the details and features of human motion.This system has significant potential for applications in motion detection,medical monitoring,virtual reality,and other fields.The accurate classification of human actions contributes to the development of personalized training plans and injury prevention strategies.Conclusions This study has substantial implications in the domains of intelligent garments,human motion monitoring,and digital twin visualization.The advancement of this system is expected to propel the progress of wearable technology and foster a deeper comprehension of human motion.

基于Unity3D的油田抽油机三维可视化监控系统设计

针对抽油机监测形式单一、三维可视化程度低和联动性差的缺陷,引入信息―物理实时映射思想,开发了油田抽油机三维可视化监控系统。设计了抽油机数字空间,搭建虚实交互层设计架构;搭建三维可视化系统数据组成及关系框架;结合逆运动学,构建数学模型,基于五维模型和Unity 3D平台设计抽油机三维可视化系统总体架构;以游梁式抽油机为对象进行实验验证,实现了实时动态监测、虚实混合控制、运动轨迹追踪和在线预警等服务功能。为三维可视化监控在石油机械领域的落地应用和数字孪生系统的开发提供借鉴。

基于语义一致性约束与局部-全局感知的多模态3D视觉定位

3D多模态数据稀缺,使得传统方法进行监督训练时文本与视觉特征缺乏语义一致性。同时传统方法还易忽视局部关系与全局信息,从而导致性能不佳。针对上述问题,提出了一种基于语义一致性约束与局部-全局感知的多模态3D视觉定位方法。首先,该方法通过蒸馏2D预训练视觉语言模型知识,帮助3D模型提取到点云-文本语义一致性特征;其次设计了局部-全局感知模块,不断补充增强候选目标特征,以更精确匹配目标。在现有的3D视觉定位数据集ScanRefer上进行的实验表明,该方法在Acc@0.25 IoU和Acc@0.5 IoU两个指标上分别达到了50.53%和37.67%,超越了现有大多数3D视觉定位算法,证实了该方法的有效性。

3D打印技术在脊柱外科应用的可视化分析

目的:对国内外3D打印技术在脊柱外科应用的研究进行可视化分析,构建可视化图谱,比较国内外的研究热点,对该领域的研究方向提供参考。方法:中文数据库以中国知网(CNKI)数据库(2013~2023年)为数据来源,使用“3D打印”和“脊柱”为主题词检索;英文数据库以Web of Science核心合集数据库(2013~2023年)为数据库来源,检索主题包括“3D printing”“Spine”,检索式为:“TS=(3D printing)AND TS=(Spine)”。除去重复以及与研究内容关联性较低的文献后,最终得到中文文献256篇,英文文献250篇,导入CiteSpace软件进行分析,对中、英文数据库中文献的年度发表数量、作者、关键词、国家、机构、关键词聚类、关键词突显度进行可视化分析。结果:在2013~2023年,国内与国外每年的发文数量相近。发表中文文献最多的前三位作者是:李超、牛国旗、孙贺;发表英文文献最多的前三位作者是:Clifton William、Damon Aaron、Nottmeier Eric。中文文献关键词可视化图谱中出现215个节点,617条连线,密度为0.0273,出现频次最高的关键词为3D打印(148次,1.09)、脊柱外科(47次,0.26)、脊柱侧凸(30次,0.10)。英文文献关键词可视化图谱中出现282个节点,1359条连线,密度为0.0367,出现频次最高的关键词为3D printing(116次,0.07)、surgery(54次,0.12)、accurate(42次,0.18)。CNKI数据库的发文机构可视化图谱中共出现206个节点,100条连线,密度为0.0047;Web of Science的发文机构可视化图谱中共出现216个节点,147条连线,密度为0.0063;发表文献数量最多的国家是中国,其次是美国和澳大利亚。国内发表中文文献最多的前三个机构是北京大学第三医院、延安大学附属医院、蚌埠医学院第二附属医院,国外发表文献最多的前三个机构是Mayo Clin、Southern Med Univ、Capital Med Univ。中、英文文献的关键词进行聚类后,分别得到6个有意义的聚类。中、英文文献中突显强度最高的关键词分别是组织工程与patient specific。结论:3D打印技术在脊柱外科研究的热点每个国家各不相同,国外机构之间联系较为密集,国内较为分散。

基于Web3D的车间可视化系统设计与实现

针对当前三维可视化系统中存在的渲染速度慢、渲染效率低等问题,引入视锥体剔除渲染算法,基于Web3D技术设计了可视化车间系统。该系统采用B/S框架,利用Three.js技术实现场景的3D加载,实现了在浏览器上进行虚拟化仿真模拟。使用八叉树和轴对称包围盒的视锥体剔除渲染算法,提高了三维场景的渲染速度。并通过综合车间的实际验证,实现了车间设备的工作状态实时监控,生产数据展示更加立体、直观,有效提升了车间可视化系统运行效率和交互性能,满足了现代化车间的管理需求。