A lateral ankle projection with accurate positioning demonstrates
1)an open tibiotalar joint.
2)a narrowed talocalcaneal joint.
3)1 inch (2.5 cm) of the fifth metatarsal base.
4)the fibula in the posterior half of the tibia.
A) 1, 2, and 3 only.
B) 2 and 4 only.
C) 1, 3, and 4 only.
D) 1, 2, 3, and 4

Question

Quizplus · Accepted Answer

1) An open tibiotalar joint should be visible on a lateral ankle projection as it is a weight-bearing joint and essential for ankle movement.
2) A narrowed talocalcaneal joint may not necessarily be visible on a lateral ankle projection, and this option does not apply to accurate positioning.
3) The lateral view of the foot should include the base of the fifth metatarsal to verify that no fractures or dislocations are present. One inch (2.5 cm) of the fifth metatarsal base should be visible on a lateral ankle projection.
4) The fibula should be slightly posterior to the tibia on a lateral ankle projection, as it is a more lateral bone. However, it should not be in the posterior half of the tibia. Therefore, option 4 is incorrect, and the correct answer is C.

A Lateral Ankle Projection with Accurate Positioning Demonstrates