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测量不准确性在X射线规划使用新的六足动物校准装置的变形纠正测量不准确性:一个实验方法与CT相关性

Moritz Mederake¹, Marc-Daniel Ahrend², Gabriel Keller³

¹Department of Traumatology and Reconstructive Surgery, BG Trauma Center Tübingen, Eberhard-Karls University of Tübingen, Schnarrenberg-Str. 95, 72076, Tübingen, Germany. mmederake@bgu-tuebingen.de.

Archives of orthopaedic and trauma surgery

|October 29, 2025

概括

使用X射线对六足动物系统进行校准,当骨头偏离中心时是不准确的,导致测量误差高达7%. 计算机断层扫描 (CT) 提供更可靠的测量,无论骨头的位置如何,用于纠正形.

科学领域:

整形外科手术整形外科手术
生物医学工程生物医学工程
医学成像医学成像

背景情况:

六足系统提供精确的变形校正,但精确的参数确定是必不可少的.
泰勒空间框架 (TSF) 使用称为Beacon的校准设备,通过X射线软件处理.
即使在软件生成的校正计划之后,也存在潜在的不准确性,特别是在校准环内的骨位置方面.

研究的目的:

为了研究骨位置在六足动物结构中的影响,对校准参数的准确性.
为了比较X射线与CT测量的精度,在不同的骨位置下进行CT测量.

主要方法:

与TSF一起安装了一个人造骨,并以偏心的位置放置在参考环内.
铁珠被用来定义用于测量的参考距离.
对每个位置进行了X射线和CT扫描,并测量和比较了距离.

主要成果:

X射线测量显示,骨位置显著依赖,不准确度高达±26毫米 (7%).
当骨头靠近探测器时,测量结果较短,而离中心更远时,测量结果较长.
与X射线相比,CT测量显示的变化明显较小.

结论:

六足动物系统的基于X射线的校准需要仔细注意骨的中心位置,以避免测量错误 (7-10%).
CT成像提供了更准确和更一致的测量,无论骨的位置.
这些发现对于在六足动物参考圈内将肢体置于中心是具有挑战性的情况下至关重要.

关键词:

延长骨延长骨的时间变形纠正变形纠正变形纠正六足动物六足动物六足动物计划软件计划软件计划软件

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