Figure 2

Calcaneal radiography in different positions in a male volunteer (28 years of age). (A) When the ankle was at 30° dorsiflexion and the tube tilts up to 50° cephalad, the tarsus and talus cannot be clearly demonstrated because they are overlapped with the subtalar joint and the sustentaculum tali. The calcaneus is elongated. (B) When the ankle was at the neutral location (0° dorsiflexion) and the tube tilts 45° cephalad, the tarsus, talus, subtalar joint, and sustentaculum tali can all be clearly shown. The calcaneal body is demonstrated in normal ratio with normal width and length. (C) When the ankle was at 20° plantarflexion and the tube tilts 35°, the tarsus, talus, subtalar joint, and sustentaculum tali can all be clearly displayed. The width and length of the calcaneus are normal.