不同位置的负载CT图像可以影响后脚对齐的评估使用二维方法
Mingjie Zhu1, Wanjun Gu2, Chao Wang3
1Department of Orthopedic Surgery, University of Colorado School of Medicine, Denver, CO, USA.
Foot & ankle international
|October 26, 2024
概括
图像旋转显著影响使用3D负载CT (WBCT) 的后脚对齐测量. 一致的图像定位对于准确的脚和脚对齐评估与WBCT-Calcaneal Moment Arm (CMA) 分析至关重要.
科学领域:
- 整形外科 整形外科 整形外科
- 放射学 放射学是一门学科.
- 生物机械工程 生物机械工程
背景情况:
- 三维负载CT (WBCT) 用于评估脚和脚对齐.
- 当前的测量技术通常依赖于二维原理,因此容易受到图像方向变化的影响.
- 图像定位可以显著影响从WBCT. 衍生后脚对齐评估.
研究的目的:
- 用3D WBCT.调查图像旋转对后脚对齐测量的影响.
- 在不同的图像方向下确定 Calcaneal Moment Arm (CMA) 测量的可靠性.
- 在WBCT分析中确定图像旋转和后脚对齐之间的相关性.
主要方法:
- 十个健康的脚接受了WBCT扫描.
- 脚图像在内部和外部旋转5-20度以模拟错位.
- 卡尔卡纳运动臂 (CMA) 被两个独立的研究人员测量.
- 观察者内部和观察者间的可靠性使用类内相关系数 (ICC) 进行评估.
- 线性回归分析了CMA和图像旋转角度之间的相关性.
主要成果:
- 内部图像旋转诱导了后脚对齐中的valgus转移,而外部旋转导致了varus转移.
- 一个1度的旋转 (内部或外部) 与修改后的WBCT-CMA值的0.48毫米变化相关 (P < .0001,R2 = 0.6406).
- 测量结果显示,观测者内部和观测者间的可靠性很高.
结论:
- 尽管有3D WBCT的功能,但当前的对齐评估工具受限于2D原则.
- 对WBCT图像的一致和标准化的定向对于准确的后脚对齐数据至关重要.
- 适当的图像定位对于使用WBCT可靠地解释脚和脚对齐至关重要.
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