面向踝关节功能评价的三维测量与重建系统设计

在临床上医师通过对踝关节的X线拍片和经验判断踝关节功能性不稳,该方法增加了临床诊断成本和诊断门槛。为此,研发一种基于三维测量与重建模型的踝关节功能评价系统。该系统采用正反结构光投影技术,通过结构光正反条纹图像检测结构光边缘并实现亚像素定位。利用主动立体视觉原理实现踝关节姿势的三维测量与三维重建,并根据三维重建模型分析踝关节功能性不稳。实验结果表明,该系统可有效地分析踝关节功能性不稳,为早期发现踝关节功能性不稳和康复医疗提供有利的诊断与决策依据。

踝关节功能评价三维测量系统设计

在临床上医师通过对踝关节的X线拍片和多年经验来判断踝关节功能性不稳,这将增加临床诊断成本和诊断门槛。对于此问题,介绍一种基于三维测量与重建模型的踝关节功能评价系统。该系统采用结构光正-反投影技术,通过结构光正-反条纹图像来检测结构光边缘并实现亚像素定位;在此基础上,利用立体视觉原理来实现踝关节姿势的三维测量与重建,最后通过三维重建模型来分析踝关节功能性不稳。实验结果表明,该系统在无任何机械接触的情况下,有效地分析评价踝关节功能性不稳,为踝关节功能性不稳的早期发现和康复医疗提供有利的诊断与决策依据。

Influence of distal tibiofibular synostosis on ankle function

Objective： To study the influence of distal tibiofibular synostosis on ankle function. Methods： Prom October 1998 to October 2004, a total of 281 consecutive patients underwent operations because of ankle fractures or distal fractures of the tibia and fibula. Distal tibiofibular synostosis occurred after operation in 8 patients. The duration of follow-up averaged 20.6 months （14-44 months）. The ankle function was assessed on the basis of functional rating system described by Mazur. Results： According to Mazur＇s ankle evaluation system, 4 patients achieved an excellent result, 2 a good result and 2 a fair result. The dorsiflexion of the synostosis ankle reduced by 8.26 degrees as compared with that of the contralateral ankle, and there was little influence on the plantar flexion. All the patients had a normal gait. Conclusion： The distal tibiofibular synostosis after the operation of ankle fractures or distal fractures of the tibia and fibula usually gives rise to few symptoms and needs no specific treatment.