Ankle

Question 1

Projections for the ankle

Answer 1

•AP Projection
•Lateral Projection Mediolateral
•Lateral Projection Lateromedial
•AP Oblique Projection (Medial Rotation)
•AP Oblique Projection (Lateral Rotation)
•Stress Method AP Projection
•Weight Bearing Method
AP Projection

Question 2

AP Projection
Part Position

Answer 2

• Supine
  Part Position:
• Leg & foot vertical & rotated 5° medially (places malleoli equidistant)

Question 3

AP Projection
Central Ray

Answer 3

Entrance: Point midway between malleoli Angulation: Perpendicular to ankle joint

Question 4

Structures Shown

• Ankle joint & tibiotalar joint
  space

Answer 4

AP Projection

Question 5

Lateral Projection Mediolateral
Central Ray

Answer 5

Entrance: Medial malleolus
Angulation: Perpendicular to ankle joint

Question 6

Structures Shown

• True lateral projection of
  lower third of tibia & fibula, ankle joint & tarsals
• 5th metatarsal base (identify
  Jones fx)

Answer 6

Lateral Projection Mediolateral

Question 7

Lateral Projection Lateromedial
Central Ray

Answer 7

Entrance: 0.5 in. superior to lateral malleolus Angulation: Perpendicular to ankle joint

Question 8

• Lateral projection of lower third of tibia & fibula, ankle joint & tarsals

Answer 8

Lateral Projection Lateromedia

Question 9

AP Oblique Projection (Medial Rotation)
Part Position

Answer 9

• Supine
  Part Position:
• Leg & foot rotated 45° medially;
  dorsiflex foot - to demonstrate bony structure
• Leg & foot rotated 15-20° medially;
  intermalleolar line parallel to IR - to demonstrate mortise joint

Question 10

AP Oblique Projection (Medial Rotation)
Central Ray

Answer 10

Entrance: Point midway between malleoli Angulation: Perpendicular to ankle joint

Question 11

Distal ends of tibia, fibula &
talus; tibiofibular articulation; mortise joints

Answer 11

AP Oblique Projection (Medial Rotation)

Question 12

AP Oblique Projection (Lateral Rotation)
Part Position

Answer 12

• Supine
  Part Position:
• Leg & foot rotated 45° laterally
• dorsiflex foot

Question 13

AP Oblique Projection (Lateral Rotation)
Central Ray

Answer 13

Entrance: Point midway between malleoli Angulation: Perpendicular to ankle joint

Question 14

• Superior aspect of calcaneus

Answer 14

AP Oblique Projection (Lateral Rotation)

Question 15

Purpose: Useful in determining fractures

Answer 15

AP Oblique Projection (Lateral Rotation)

Question 16

Stress Method AP Projection
Central Ray

Answer 16

Entrance: Ankle joint
Angulation: Perpendicular

Question 17

To evaluate the presence of
ligamentous tear & joint separation

Answer 17

Stress Method AP Projection

Question 18

Weight Bearing Method
AP Projection
Central Ray

Answer 18

Entrance: Midway at level of ankle joint Angulation: Horizontal

Question 19

Purpose: Identify ankle joint space narrowing; side-to-side comparison of joint

Answer 19

Weight Bearing Method
AP Projection