PROSTHETICS FITTING SYSTEMS

先进的假体装配系统的设计和评估需要 复杂而全面的人体测量数据、分析和 可视化方法。点到点和接触式铸件测量 这种方法已经被修复师使用了几十年。这些 测量方法不能提供关于形状的足够信息， 体积和组织特征允许现代CAD软件程序 要真实地对套接字所针对的残差进行建模 都是设计好的。股骨头残端的解剖三维重建 3-D光学表面和螺旋CT成像，不同于 其他3-D扫描模式，能够清楚地描绘 完整的表面几何形状以及软组织和硬组织 病人残留物的成分。真正的3-D几何图形 描述，包括内部组织特征，因此 可通过低辐射暴露的非侵入性扫描获得。 该提案的目标是将这些模式连接起来，以构建 建立有限元模型，对假体装配过程进行量化。 第一阶段(测量、验证和开发)涉及比较 四种测量方法：传统的接触法， 3空间手持式点数字化仪、三维光学表面数字化仪及 螺旋CT体积扫描仪。最后两种测量方法允许我们 收集高分辨率3-D拓扑和体积数据 使用3Space数字化仪进行验证。 第二阶段(实体模型验证和开发)将涉及使用 3D光学表面数字化仪和螺旋CT扫描仪几何数据 使用生成残渣的数学完整实体模型 物理质量属性。体积测量和内部测量都将 在身体四肢上执行，以验证实体模型的内部和 外部几何图形。包括压力测试(加载)和 材料特性信息，将生成有限元模型。

The design and evaluation of advanced prosthetic fitting systems requires complex and comprehensive anthropometric data, analysis, and visualization methods. Point-to-point and contact casting measurement methods have been used by prosthetists for many decades. These measurement methods do not provide enough information on the shape, volume and tissue characteristics to allow modern CAD software programs to realistically model the residua for which the socket is being designed. Anatomic three-dimensional reconstruction of the residuum by 3-D Optical Surface and Spiral Computed Tomography (CT) imaging, unlike other 3-D scanning modalities, is capable of clearly delineating the complete surface geometry along with the soft tissue and hard tissue components of the patient's residuum. A true 3-D geometrical description, including the internal tissue characteristics, has therefore become available by noninvasive scanning with low radiation exposure. The goal of this proposal is to interface these modalities to build a finite element model to quantify the prosthetic fitting process. Phase I (measurement validation and development) involves the comparison of four types of measurement methods: the traditional contact method, 3Space hand held point digitizer, 3D Optical Surface digitizer, and Spiral CT volumetric scanner. The last two measurement means allow us to collect high resolution 3-D topological and volumetric data for validation using the 3Space digitizer. Phase II (solid model validation and development) will involve the use of 3D Optical Surface digitizer and spiral CT scanner geometry data to generate a mathematical complete solid model of the residuum with physical mass properties. Both volumetric and internal measurements will be performed on cadaver limbs to validate the solid model's internal and external geometry. With the inclusion of pressure testing (loading) and materials property information, a finite element model will be generated.