The Comparison of Radiographic to Computerized Calculations of the Cross-sectional Area of the Long Bone

電腦與X光計算長骨橫斷面積比較

蔡焜洋(Kun-Yang Tsai) ； 周世認(Shih-Jen Chou)

《臺灣獸醫學雜誌》 30卷3期 (2004/09) Pp. 176-180

https://doi.org/10.7009/TVJ.200409.0176

摘要

骨科醫師對骨外固定架（External Fixators）拆除的判定是有困難的，尤其是骨折癒合的時候在斷端尚有空隙時，因此，我們計算骨折癒合面積和根據之前的研究作用於骨頭斷端上的生物力學力量（Biomechanical forces）以作為骨外固定架拆除的參考。計算癒合面積最簡單的方式是由X光片上，本研究的主要目的是比較由X光片上和電腦計算的差異，我們把骨頭切成五個切面，使用Pearson Correlation Coefficient來分析，γ值由近端生長板端到遠端生長板端分別為γ＝0.896，0.893，0.934，0.900，0.896所有的P值小於0.001，X光片上計算的差異比電腦計算小於一倍以內，本研究顯示從X光計算骨頭癒合面積和精確的電腦計算有其相關性的符合。

關鍵字

骨頭 ； 計算 ； 狗 ； 橫斷面積

並列摘要

Removal of an external fixator is a difficult judgement for a clinician, especially when there is a gap at the fracture site. Therefore, we calculated the area of healing callus and quoted from previous study of biomechanical forces acting on it as a reference for external fixator removal. The simplest way to calculate the cross-sectional area of the healing callus is from the radiographic image. The aim of this study is to compare the calculations of the cross-sectional area of the long bone using both radiographic and computerized calculation to evaluate the differences between them. We cut the bone into five sections and compared the computerized and radiographic calculations using the Pearson correlation coefficient. The γ values from proximal physis to distal physis was 0.896, 0.893, 0.934, 0.900, 0.896 respectively. AII the P values (＜ 0.001) were significantly different. The difference between the radiographic calculations and the computerized calculations was within one fold. This study indicates that the calculation of cross-sectional area using radiographs corresponds accurately with that calculated using the more precise digital imaging technique.

並列關鍵字

bone ； calculation ； canine ； cross-sectional area