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一种混合统计形态学自由形变形方法,用于3D个性化脚模型
Liangliang Xiang1, Yaodong Gu1, Vickie Shim2
1Faculty of Sports Science, Ningbo University, China; Auckland Bioengineering Institute, The University of Auckland, New Zealand.
Journal of biomechanics
|April 27, 2024
概括
本研究介绍了一个有效的框架,用于创建个性化的3D脚模型,使用统计形状建模和自由形状变形. 这种方法从表面扫描中准确地重建了脚和脚的生物机械模型,节省了大量的时间.
科学领域:
- 生物力学 生物力学
- 医疗成像医学成像
- 计算解剖学的计算解剖学
背景情况:
- 个性化3D脚和脚模型用于生物机械分析是耗时的,因为广泛的医学成像和数据处理要求.
- 现有的方法在捕捉人口层面的解剖变异以实现准确的模型个性化方面往往缺乏效率.
研究的目的:
- 开发和评估一个有效的框架,用于构建全面的3D脚模型.
- 将统计形状建模 (SSM) 与自由形状变形 (FFD) 整合起来,以根据外部脚表面数据准确地重建内部骨结构.
主要方法:
- 在50名参与者的外部脚面扫描上利用主要成分分析 (PCA) 来开发统计形状模型 (SSM).
- 在SSM的指导下,采用自由形变形 (FFD) 来重建内部骨质几何.
- 通过将生成的模型与不包括在训练集中的手动细分几何形状进行比较来验证工作流.
主要成果:
- 该框架在预测软组织和骨质几何学方面取得了很高的准确性,Dice的相似系数分别为0.92±0.01和0.84±0.03.
- 定量指标显示,豪斯多夫距离 (2.2 ± 0.19毫米软组织,1.83 ± 0.1毫米骨头) 和根平均平方误差 (2.95 ± 0.23毫米软组织,2.36 ± 0.12毫米骨头) 的误差率较低.
- 前十大主要组件捕获了85%的种群变化,使得可靠的模型生成.
结论:
- 为3D个性化脚模型重建提供了一种高效准确的方法.
- 工作流利用群体解剖学来生成适用于刚体和有限元素分析的模型.
- 开发的框架被整合到开源的肌肉骨图谱项目中,提高生物力学研究的可访问性.
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