Rozzanigo Umberto, Pizzoli Andrea, Minari Chiara, Caudana Roberto
Dipartimento di Diagnostica per Immagini, Azienda Ospedaliera Carlo Poma, Mantova.
Radiol Med. 2005 Mar;109(3):234-8.
To compare the manual measurements of lower limbs on digital images with those obtained with dedicated software.
Forty patients with a clinical suspicion of lower limb deformity were enrolled. Eighty digital radiographs were produced with a remote-controlled radiography system (Philips Omnidiagnost). The measurements were taken separately by an Orthopaedic Surgeon and by a Radiologist, by hand and with the aid of software, respectively. Five parameters were assessed: femoral length, tibial length, distal-medial femoral angle, proximal-medial tibial angle and tibial-femoral angle. The statistical analysis of the comparison was based on Student's t-test. The inter-observer variability of the methods, manual and computer-aided, was evaluated with Fisher's F-test on a sample of measurements (20 lower limbs), taken by 5 different Orthopaedic Surgeons and Radiologists, respectively.
There were no statistically significant differences between the measurements taken with the manual and computer-aided methods (p<0.05). The overall reproducibility of both methods was similar; conversely, the separate evaluation of angles and lengths showed that the computer-aided method was less variable in the measurement of angles and a little more variable in the measurement of lengths than the manual method.
The computer-aided evaluation of the alignment and articular orientation parameters of lower limbs is as accurate and reliable as the traditional manual method, but is faster and allows better-quality images.
比较数字图像上下肢的手动测量结果与使用专用软件获得的测量结果。
纳入40例临床怀疑下肢畸形的患者。使用遥控放射成像系统（飞利浦全能诊断仪）拍摄80张数字X线片。测量分别由一名骨科医生和一名放射科医生进行，前者手动测量，后者借助软件测量。评估了五个参数：股骨长度、胫骨长度、股骨远端内侧角、胫骨近端内侧角和胫股角。比较的统计分析基于学生t检验。通过对5名不同的骨科医生和放射科医生分别测量的样本（20条下肢）进行Fisher F检验，评估了手动和计算机辅助方法之间观察者间的变异性。
手动测量和计算机辅助测量之间无统计学显著差异（p<0.05）。两种方法的总体重复性相似；相反，角度和长度的单独评估表明，计算机辅助方法在角度测量中的变异性较小，而在长度测量中的变异性比手动方法略大。
下肢对线和关节方向参数的计算机辅助评估与传统手动方法一样准确可靠，但速度更快且能提供质量更好的图像。
