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使用两个X射线图像创建一个参数化的脊柱模型,并分析与脊柱固定相邻的磁盘应力-有限元分析

Te-Han Wang¹, Po-Hsing Chou^2,3, Chen-Sheng Chen¹

¹Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan.

Bioengineering (Basel, Switzerland)

|November 27, 2025

概括

对于青少年异常脊柱病 (AIS) 的后脊柱仪器仪表可以导致相邻段变性. 这项研究从X射线创建了一个有限元模型来分析生物力学变化,在手术后发现邻近脊柱段的变化压力.

科学领域:

脊柱生物力学脊柱生物力学
医学成像医学成像
有限元素分析的研究.

背景情况:

后部仪器是严重的青少年异常学脊椎病 (AIS) 的标准治疗方法.
邻近细分退化 (ASD) 是AIS的脊髓融合手术后的一个已知的并发症.
关于AIS手术对邻近脊柱段的生物力学影响的研究有限,需要创建反映脊椎变形的患者特定有限元素 (FE) 模型的方法.

研究的目的:

开发一个具体的,参数化的FE模型,使用双平面X射线图像来模拟AIS中的脊椎变形.
使用FE分析,比较相邻部分的手术前和手术后生物机械变化,包括运动范围 (ROM),端板应力和椎间盘应力.

主要方法:

从使用ANSYS软件的AIS患者的双平面X射线图像创建了患者特有的脊椎FE模型.
术前模型的准确性与CT重建进行了验证,在科布角度和位测量中存在小差异.
应用了曲时刻来模拟脊柱负荷,比较了手术前和后的模型来评估生物力学参数.

主要成果:

一个经过验证的,针对特定病例的FE模型,反映冠状平面脊椎变形,从X射线数据成功开发出来.
生物机械分析显示,在相邻部分,最大端板和脊椎间盘应力下降.
相反,尾部相邻部分在模拟手术仪器后经历了压力增加.

结论:

开发的FE建模方法为分析AIS中与仪器相邻的脊柱段的生物力学影响提供了一种方法.
对于AIS的外科仪器改变了相邻段的生物力学环境,导致应力再分配.
使用这种FE建模技术进行进一步的研究可以帮助理解并潜在地减轻手术后邻近段变性.

关键词:

图像X射线图像X射线图像X射线图像X射线图像邻近的磁盘是相邻的磁盘.生物力学生物力学有限元素模型的模型是有限的.脊柱体脊椎病是什么?脊柱体脊椎病是什么?

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