In taking a calcaneal axial radiograph, which statement is correct?

• A. Enter midline at base of 3rd metatarsal
• B. Supine or leg fully extended
• C. Image receptor centered to ankle with plantar foot perpendicular to it
• D. Central ray directed 40 degrees cephalad to long axis of foot

Answer: (D)

The central idea is to project the calcaneus along its long axis by angling the beam correctly. For an axial calcaneus view, you direct the central ray about 40 degrees cephalad relative to the long axis of the foot. This specific angulation lines the beam with the calcaneus, helps open the subtalar joint, and minimizes superimposition from the talus, giving a clearer view of the calcaneal body and hindfoot structure. The other statements don’t describe the correct beam angulation or positioning: entry point at the base of the third metatarsal isn’t used for this view, the positioning isn’t simply “supine with the leg fully extended,” and centering the image receptor to the ankle with the plantar surface perpendicular to it doesn’t achieve the axial projection.