摘要
目的 通过对比 EOS 成像系统(EOS imaging system),来评估全幅数字 X 线摄影(the full view digital radiography,DR)图像所测量下肢力线的准确性.方法 本研究为前瞻性研究.对同一个膝关节骨关节炎患者在同一天分别使用全幅 DR 和 EOS 成像系统进行下肢全长检查并测量下肢力线.结果 共纳入27 例,其中男 6 例,女 21 例.年龄 48～80 岁,平均(63.67±7.68)岁.所有研究对象分左、右下肢分别测量,共 54 例.下肢力线的测量在全幅 DR 和 EOS 成像系统两种检查方法,差异均无统计学意义(P>0.05),其中髋膝踝角(hip-knee-ankle angle,HKA)的 P 值为 0.331,股骨远端外侧角(lateral distal femoral angle,LDFA)的 P 值为 0.140,胫骨近端内侧角(medial proximal tibial angle,MPTA)的 P 值为 0.359,股骨胫骨关节线夹角(joint line convergence angle,JLCA)的 P 值为 0.974.结论 全幅 DR 虽然存在边缘放大效应,但对于下肢力线测量的影响较小.
Abstract
Objective To evaluate the accuracy of lower limb force lines measured in full view DR images by comparing EOS imaging systems.Methods This study was a prospective study.A full view DR and EOS imaging systems were used to perform a full-length examination of the lower limb and measure the lower limb force line for the same patient with knee osteoarthritis.Results A total of 27 patients was included(6 males and 21 females).The age ranged from 48 to 80 years old,with an average of(63.67±7.68)years.All research subjects were measured separately for the left and right lower limbs,with a total of 54 cases.There was no statistically significant difference in the measurement of lower limb force line between the full-range DR and EOS imaging systems(P>0.05).The P-value of hip-knee-ankle was 0.331,the P-value of lateral distal femoral angle was 0.140,the P-value of medial proximal tibial angle was 0.359 and the P-value of joint line convergence angle was 0.974.Conclusions Although full view DR has edge amplification effect,its impact on lower limb force line measurement is relatively small.
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