Which projection is described as plantodorsal (axial) for the calcaneus?

Which projection is described as plantodorsal (axial) for the calcaneus?

• A. Lateral
• B. AP
• C. AP oblique
• D. Plantodorsal

Answer: (D)

The idea being tested is an axial view of the calcaneus where the beam travels from plantar to dorsal. In this plantodorsal projection, the central ray enters the sole of the heel and exits the top of the calcaneus, usually with the foot positioned so the plantar surface is toward the detector and the ray angled cephalad about 40 degrees. This orientation aligns with the calcaneus’s long axis, reduces superimposition from the talus, and provides a clear view of the calcaneal body and subtalar joint. That’s why this directly described plantodorsal view is the correct choice, unlike lateral or AP/AP oblique projections which are not axial and can obscure parts of the calcaneus.

The idea being tested is an axial view of the calcaneus where the beam travels from plantar to dorsal. In this plantodorsal projection, the central ray enters the sole of the heel and exits the top of the calcaneus, usually with the foot positioned so the plantar surface is toward the detector and the ray angled cephalad about 40 degrees. This orientation aligns with the calcaneus’s long axis, reduces superimposition from the talus, and provides a clear view of the calcaneal body and subtalar joint. That’s why this directly described plantodorsal view is the correct choice, unlike lateral or AP/AP oblique projections which are not axial and can obscure parts of the calcaneus.