LRA-220 Week 1 Review

Question 1

How much central ray (CR) angulation (if any) should be used for an AP projection of the toes?

Answer 1

10-15 degree towards the calcaneus (cephalic)

Question 2

To decrease the angle between the anterior surface of the foot and anterior surface of the lower leg is described as:

Answer 2

Dorsiflexion (pointing toes upward)

Question 3

What projections of the ankle will best demonstrate the open joint space of the lateral aspect of the ankle joint?

Answer 3

Mortise projection

Question 4

How much rotation from an AP position of the ankle will typically produce an AP mortise projection?

Answer 4

15-20 degree

Question 5

The purpose of the AP stress views of the ankle is to demonstrate:

Answer 5

To see possible joint separation or ligament tears

Question 6

A radiograph of an AP medial oblique projection of the foot, if positioned correctly, should demonstrate:

Answer 6

3rd -5th metatarsals free of superimposition

Question 7

A radiograph of an AP mortise projection of the ankle reveals that the lateral malleolus is slightly superimposed over the talus and the lateral joint space is not open. What is most likely the cause for this radiographic outcome?

Answer 7

Insufficient medial rotation of our foot and ankle