Using 320 MSCT to study the characteristics in terms of the number, position and size of the percutaneous perforators originating from the anterior tibial, posterior tibial, and peroneal arteries to help surgeons illustrate the relative position of the perforator arteries, thereby serving as the basis for selecting the appropriate flap design for the lesion, choosing the correct flap, and also, increasing the safety when applying the perforator flap for each patient on clinical.