RadSetu

X-ray Positioning

AP ankle

Radiographic projections, patient positioning and X-ray references.

Method & scope

Patient position

  • Supine, leg fully extended.
  • Foot dorsiflexed (plantar surface perpendicular to the IR) — do not force it.
  • Long axis of the foot vertical; no rotation of the leg.

Centering

Midway between the malleoli.

Central ray

Perpendicular to the IR.

Source-to-image distance

100 cm (40″).

Image evaluation

  • Tibiotalar joint open medially; lateral (talofibular) joint closed
  • Fibula slightly overlapping the tibia and talus
  • Base of the 5th metatarsal included