A Study On Modeling And Simulation Of Human Soft Tissue Organs Based On 3DsMAX

Along with the rapid development of computer image technology, the 3D reconstruction and simulation to human tissue organs have become an important research direction in the field of medicine. Most of the human tissues are soft tissues, such as skins, muscles, tendons, and various viscera. Therefore, the simulation of soft tissues has very significant implications for the study of tissues and organs. If the true condition of the soft tissue organs from the 2D images can be shown to people with the help of the 3D images through computer calculation, and making a prediction for its numerous variations, the researchers can understand the human tissues and organs better, which can be a big help for doctors to give treatments to the patients in clinical medicine. A series of methods has been proposed in the decades of research, for example, the mass-spring model, the finite element algorithm, the center line description, and the chain mail model. Among these methods, the finite element method is regarded as the most accurate calculation, but it has a few shortcomings as a high demand for hardware, the huge computation and the poor real-time. The other several methods have the low demand for the hardware and software as well as reducing the calculation accuracy. So, if there is a method which can satisfy both the lower demand for software and hardware and higher calculation accuracy, the significance of the soft tissues stimulation will be self-evident. After analyzing and comparing the common used software to 3D reconstruction and simulation, the study draws a conclusion that 3DsMax has a very powerful function in 3D modeling and simulation in the field of education technology nowadays. This software does not require extraordinary demand for the hardware, and the animation made by this software can be carried out in the ordinary home computer. At the same time, the computing speed of software used for internal physical mechanics simulation is significantly higher than the finite element analysis software. Therefore, 3DsMax has the unique advantage in the modeling and simulation of soft tissue, which has features of accurate and fast calculation and low demand for hardware.3DsMax has its own unique and diverse modeling methods that can satisfy the 3D reconstruction of the soft tissue based upon images. After decades of development, the reactor dynamics system molding for the real physical and mechanical environment simulation has achieved the nearly actual degree, which is the optimization design of dozens of versions. The organ structure of soft tissues is very complex, so deformation simulation the soft tissue becomes much more difficult. If the common used method, such as the finite element method, is employed, the amount of calculation is too large. Such calculation should depend on the powerful hardware, otherwise the accuracy cannot meet the requirement of research. These problems in the soft tissue modeling and simulation should be avoided, thus this subject investigates into the soft tissue simulation based upon images by 3Ds Max. The study falls into three parts, specifically as follows.The first part analyses the function of 3DsMax. After studying the soft tissue model construction in 3DsMax based on images, and analyzing the methods of simulation for models, the paper studies the ways of constructing the geometrical model of the soft tissue based on images by using the polygon modeling method and NURBS modeling method. It also probes into the function of the reactor dynamics system in the soft tissue simulation based on images.The second part explores the classification of the human soft tissue organs that are divided into three types as hollow structure, non-hollow structure, and complex structure. After expounding on the methods of constructing geometrical model for each type of human soft tissue organs, the study constructs the method process of geometrical models on human soft tissue organs based on 3Ds Max images. The paper collects MRI images of the midsection and CT images of lower abdomen, extracts interested areas of these images by adopting automatic segmentation and manual correction, and then establishes the geometrical models of bladder and liver.The third part analyzes dynamics system of 3DsMax and puts forward the physical model building method according to the geometrical model built in the second part. After the analysis of the geometrical model, the physical model is built. This study simulates the deformation condition of the bladder under the different filling conditions through the reactor dynamic system of 3DsMax, compares with 3D reconstruction model image of the bladder on the different filling conditions, and then arrives at a conclusion on the change of error curve. It also probes into the feasibility of soft tissue simulation by using 3Ds Max.To sum up, this subject conducts modeling and simulation of human soft tissue organs such as bladder and liver by using 3Ds Max. It sets up the foundation for basic method of soft tissue simulation based on 3DsMax, and makes an experiment analysis. These results verify the feasibility of soft tissue simulation based on 3DsMax primarily as well as provide a more simple and effective method for modeling and simulation of soft tissue organs.