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Truth cube: establishing physical standards for soft tissue simulation.

机译：真相立方：建立用于软组织模拟的物理标准。

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摘要

Accurate real-time models of soft tissue behavior are key elements in medical simulation systems. The need for fast computation in these simulations, however, often requires simplifications that limit deformation accuracy. Validation of these simplified models remains a challenge. Currently, real-time modeling is at best validated against finite element models that have their own intrinsic limitations. This study develops a physical standard to validate real-time soft tissue deformation models. We took CT images of a cube of silicone rubber with a pattern of embedded Teflon spheres that underwent uniaxial compression and spherical indentation tests. The known material properties, geometry and controlled boundary conditions resulted in a complete set of volumetric displacement data. The results were compared to a finite element model analysis of identical situations. This work has served as a proof of concept for a robust physical standard for use in validating soft tissue models. A web site has been created to provide access to our database: http://biorobotics.harvard.edu/truthcube/ (soon to be http://www.truthcube.org).
机译：精确的软组织行为实时模型是医学仿真系统中的关键要素。然而，在这些模拟中对快速计算的需求常常需要简化，以限制变形的准确性。这些简化模型的验证仍然是一个挑战。当前，实时建模最多只能针对具有自身固有局限性的有限元模型进行验证。这项研究开发了一种物理标准来验证实时软组织变形模型。我们拍摄了立方硅橡胶的CT图像，该硅橡胶带有嵌入的特氟龙球，并经过了单轴压缩和球形压痕测试。已知的材料特性，几何形状和受控的边界条件产生了完整的体积位移数据集。将结果与相同情况的有限元模型分析进行比较。这项工作已成为用于验证软组织模型的健壮物理标准的概念证明。已经创建了一个网站，以提供对我们数据库的访问：http://biorobotics.harvard.edu/truthcube/（即将成为http://www.truthcube.org）。

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