ANKLE

Question 1

PP: Supine; leg & foot vertical & rotated 5o medially (places malleoli equidistant)

RP: Point midway between malleoli

CR: ┴ to ankle joint

SS: Ankle joint & tibiotalar joint space

Answer 1

AP PROJECTION

Question 2

PP: Semisupine; lateral surface of foot against IR; dorsiflex foot

RP: Medial malleolus

CR: ┴ to ankle joint

SS: True lateral projection of lower third of tibia & fibula, ankle joint & tarsals

5th metatarsal base (identify Jones fx)

Answer 2

LATERAL PROJECTION

Mediolateral

Question 3

PP: Semisupine; medial surface of foot against IR; dorsiflex foot

RP: 0.5 in. superior to lateral malleolus

CR: ┴ to ankle joint

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

Answer 3

Lateromedial

Question 4

PP: Supine;

Leg & foot rotated 45o medially; dorsiflex foot – to demonstrate bony structure

Leg & foot rotated 15-20o medially; intermalleolar line // to IR – to demonstrate mortise joint

RP: Point midway b/n malleoli

CR: ┴ to ankle joint

SS: Distal ends of tibia, fibula & talus; tibiofubular articulation; mortise joints

Answer 4

AP OBLIQUE PROJECTION

Medial Rotation

Question 5

PP: Supine; leg & foot rotated 45o laterally; dorsiflex foot

RP: Point midway b/n malleoli

CR: ┴ to ankle joint

SS: Superior aspect of calcaneus

ER: Useful in determining fxs

Answer 5

Lateral Rotation

Question 6

PP: Seated; foot forcibly turned toward the opposite side; inversion & eversion stress to joint

RP: Ankle joint

CR: ┴

ER: To evaluate the presence of ligamentous tear & joint separation

Answer 6

STRESS METHOD

AP PROJECTION

Question 7

PP: Upright; heels against the IR; IR vertical; toes pointing toward the x-ray tube

RP: Midway at level of ankle joint

CR: Horizontal

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

Answer 7

WEIGHT-BEARING METHOD

AP PROJECTION