Department of Orthopaedic Surgery, Beilinson-Rabin Medical Center, Petach Tikva, Israel.
Eur J Radiol. 2012 Dec;81(12):4029-34. doi: 10.1016/j.ejrad.2012.07.016. Epub 2012 Aug 9.
The new computerized system is based on image analysis and designed to aid in orthopedic surgeries by virtual trajectory of the guide wire, intra-operative planning and various measurements. Validation of the accuracy and safety of any computer-aided surgery system is essential before implementing it clinically. We examined the accuracy of guide-wire length and angle measurements and fusion of multiple adjacent images (panoramic view image, PVI(®)) of the new software.
This is a 2-part study. Part I: twenty guide wires were drilled to various depths in a synthetic femur model and the results obtained by the software measurements were compared with manual measurements by a caliper and a depth gauge. Part II: a sawbone femur shaft was osteotomized and various inclinations of > 10° to the varus or valgus angles were tested. The manually obtained measurements of angles and lengths were compared to the new computerized system software PVI.
There was a significant positive linear correlation between all groups of the computerized length and the control measurements (r>0.983, p<0.01). There was no significant difference among different distances, angles or positions from the image intensifier. There was a significant positive linear correlation between the angle and length measurement on the PVI and the control measurement (r>0.993, p<0.01).
The new computerized software has high reliability in performing measurements of length using an aiming, positioning and referring device intra-operatively.
新的计算机化系统基于图像分析，旨在通过导丝的虚拟轨迹、术中规划和各种测量来辅助矫形外科手术。在将任何计算机辅助手术系统临床应用之前，对其准确性和安全性进行验证是至关重要的。我们检查了新软件的导丝长度和角度测量以及多个相邻图像（全景视图图像，PVI(®)）融合的准确性。
这是一项 2 部分研究。第 1 部分：将 20 根导丝钻入合成股骨模型中的不同深度，然后将软件测量结果与卡尺和深度计的手动测量结果进行比较。第 2 部分：对一个人造股骨骨干进行截骨，测试 > 10°至内翻或外翻角度的各种倾斜度。手动获得的角度和长度测量值与新的计算机化系统软件 PVI 进行了比较。
计算机化长度与对照组测量值之间存在显著的正线性相关性（r>0.983，p<0.01）。距离、角度或从影像增强器的位置不同，没有显著差异。PVI 上的角度和长度测量与对照组测量值之间存在显著的正线性相关性（r>0.993，p<0.01）。
新的计算机化软件在术中使用瞄准、定位和参考装置进行长度测量时具有高度可靠性。
