The ankle is a hinge joint composed of the tibia, fibula, and talus bones. It has three main ligaments that hold the distal tibia and fibula together and provide stability. Additional ankle motions can be viewed through external and internal oblique views or a poor lateral view. Stress views are also used to examine ligament injuries. When examining ankle radiographs, the ABCs (ankle bones, mortise, and re-examination), malleoli, tarsal bones, Achilles fat triangle, and peripheral areas should be assessed.

1. Ankle radiological anatomy
Dr. Henock.N
Radiology

2. Ankle joint
• A hinge joint , made up of 3 bones
Tibia, fibula & talus
• Distal tibia & fibula held by 3 ligaments

3. Ankle stability

4. Mortise & tenon

5. Ankle ring

7. Ankle motions & positions

29. Additional views
 External oblique; with 45 degree external rotation
Used for posterior tibial fractures & distal fibular fractures
 Internal oblique; with 45 degree internal rotation
 Poor lateral ; foot rotated externally 15 degree
better view of poster tibial malleoles
 stress views; to demonstrate ligamentous injuries

31. Stress view

32. Approach
• ABC’S
• Malleoli
• Mortise
• Re- examine
• Examine pheripheral areas
 most proximal portion of fibula seen on ap & mortise views
 Base of 5th metatarsal
 Tarsal bones ( navicular, talar neck, cuboid, ant. Process of calcanus)
 Achilles fat triangle ( kager’s fat pad)

34. Thank u !