For a lateral view of the foot on radiography, the beam is best centered over which anatomical region?

For a lateral view of the foot on radiography, the beam is best centered over which anatomical region?

• A. Heads of metatarsals 1-2
• B. Bases of metatarsals 3-5
• C. Calcaneus
• D. Talus

Answer: (B)

Centering the beam at the base of the third metatarsal places the central ray through the midfoot, aligning the entire foot from hindfoot to forefoot in a true lateral view. This position ensures the calcaneus and talus, subtalar joint, midfoot, and distal metatarsals are captured in a single image, which is essential for evaluating alignment and injuries in both the hindfoot and Lisfranc region. If the beam is centered over the forefoot (heads) or the hindfoot (calcaneus or talus) alone, parts of the midfoot or distal structures may be missed or foreshortened, reducing the diagnostic value of the lateral view.

Centering the beam at the base of the third metatarsal places the central ray through the midfoot, aligning the entire foot from hindfoot to forefoot in a true lateral view. This position ensures the calcaneus and talus, subtalar joint, midfoot, and distal metatarsals are captured in a single image, which is essential for evaluating alignment and injuries in both the hindfoot and Lisfranc region. If the beam is centered over the forefoot (heads) or the hindfoot (calcaneus or talus) alone, parts of the midfoot or distal structures may be missed or foreshortened, reducing the diagnostic value of the lateral view.