NORMAL ANATOMY Osteology Lateral view Posterior view Superior view Attachments Posterior view Medial view Lateral view Superior view RADIOGRAPHIC VIEWS Lateral View Positioning patient lateral decubitus on ipsilateral side knee flexed 45° + foot dorsiflexed beam aim 2.5cm below medial malleolus Indications Bohler's angle angle of Gissane Critique superimposition of fibula + posterior tibia superimposition of talar domes open tibiotalar joint + talonavicular joint + tarsal sinus Axial View Positioning METHOD PATIENT BEAM Plantodorsal/Harris supine vs. seated knee extended + leg slightly IR + foot dorsiflexed base of 3rd metatarsal 40° cephalad Dorsoplantar prone ankle elevated + foot dorsiflexed proximal anterior calcaneus 40° caudad Dorsoplantar/Harris erect foot dorsiflexed mid-calcaneus 45° cephald Indications anterior + posterior calcaneus Critique visualization of entire calcaneus visualization of sustentaculum tali Canale View Positioning patient supine foot with max plantarflexion + pronated 15° beam aim at talar neck + 15° cephalad Indications talar neck Critique visualization of talar neck Broden View Positioning patient supine leg IR 10/20/30/40° + foot dorsiflexed beam aim at lateral malleolus + 10/20/30/40° cephalad Indications posterior facet of talus = 10° shows posterior aspect, 40° shows anterior aspect sustentaculum tali/middle facet of talus = 20-30° view subtalar joint NORMAL FINDINGS Notable normal variants os trigonum sesamoid bone located posterior to posterior process of talus, usually unilateral Steida’s process elongated posterior process of talus oblique talus talonavicular subluxation that reduces with forced plantarflexion