Comparative study of manual and digital method in the calculation of the tibial plateau angle in dogs

ABSTRACT There are few published data on the applicability and reliability of digital methods for measuring the TPA compared with manual measurement. The objective of this study was to compare the TPA obtained by calculating standard manual on conventional radiographs, with the values obtained by calculations in digital images through a computer program. Bilateral digital radiographs of hind limb were analyzed in true profile for 20 healthy dogs older than two years. Three observers with similar levels of experience in calculating the TPA conducted measurements on each radiograph. First we calculated the angle of the tibial plateaus manually in x-ray film and then the calculations were made through the program offered by the computer program in the digital image. The results of this study showed significant differences between the methods, with average value of 20.48±3.71 digital calculating average and 23.90±2.4 in the manual calculation. P value was

摘要：相较于手动测量法，目前鲜有公开数据支持数字化测量方法在胫骨平台角（Tibial Plateaus Angle，TPA）检测中的适用性与可靠性。本研究旨在对比两种方式获取的TPA数值：其一为基于传统X线片的标准手动测算方法，其二为借助计算机程序对数字化影像进行计算所得的结果。本研究纳入20只年龄超过2岁的健康犬，对其后肢双侧数字化X线片的真实侧位影像展开分析。3名在TPA测算领域经验水平相近的观察者对每一张X线片进行测量。研究首先通过X光胶片手动测算胫骨平台角，随后借助该计算机程序对数字化影像完成计算。本研究结果显示两种测量方法间存在显著差异：数字化测算的平均数值为20.48±3.71，手动测算的平均数值为23.90±2.4。P值为