![]() ![]() The result of this computer-calculated arch angle was compared with manual measurement results from two radiologists, which showed that our automatic arch angle measurement method had a high consistency. Images of two critical bones, the calcaneus and the fifth metatarsal bone, were isolated from the lateral radiographs to form reference images, and were then compared with template images to calculate the arch angle. Lateral radiographic images of their right and left feet were obtained, and mutual information (MI) registration was used to automatically calculate the arch angle. ![]() In this study, seventy male military new recruits were studied. However, manual measurement of the arch angle is time-consuming and often inconsistent between different examiners. ![]() Currently, the diagnosis of flatfoot is mainly based on radiographic examination of the calcaneal-fifth metatarsal (CA–MT5) angle, also known as the arch angle. Flatfoot (pes planus) is one of the most important physical examination items for military new recruits in Taiwan. ![]()
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