AP oblique ankle

Question 1

• How much is the foot/ankle rotated to demonstrate the open tibiofibular articulation?

Answer 1

45 degrees

Question 2

• How much is the foot/ankle rotated to demonstrate the open ankle mortise joint?

Answer 2

15-20 degrees

Question 3

• What is the central ray location?

Answer 3

Ankle joint

Question 4

• How should the foot be positioned in relationship to the lower leg for both AP oblique projections of the ankle?

Answer 4

foot should be dorsiflexed 90 degrees

Question 5

• What 2 structures should line up to ensure proper positioning to demonstrate an open ankle mortise joint? What is the official name for the line formed between these structures? How is this line positioned in relationship to the IR?

Answer 5

Both lateral and medial malleoi lined up, parallel to plane of IR. The name of the line is the intermalleoular line, and it should be parallel with the IR.