Foot

Question 1

What kV is used for a foot projection?

Answer 1

60-70kV

Question 2

On an AP axial foot, there is equal spacing between the second through fifth metatarsals

Answer 2

True

Question 3

What anatomy is included on an AP axial foot projection?

Answer 3

Phalanges, metatarsals, tarsals, talar neck, proximal calcaneus

Question 4

On an AP axial foot, the medial-intermediate cuniform joint is open

Answer 4

True

Question 5

On an AP axial foot projection, the joint between the first and second MT based is open

Answer 5

True

Question 6

What angle is used for an AP axial foot projection?

Answer 6

10-15 degrees

Question 7

What angle is needed for a patient with a lower arch

Answer 7

Lower angle

Question 8

What angle is needed for a patient with a higher arch?

Answer 8

A higher angle

Question 9

What will happen if an ankle is flexed less than 90 degrees, or extended?

Answer 9

Arch angle will increase

Question 10

How do you assess inaccurate CR angulation?

Answer 10

•closed TMT joint spaces
•closed navicular-cuneiform joint space

Question 11

How do you assses lateral rotation on an AP axial foot?

Answer 11

•MT based demonstrate increased superimposition
•medial and intermediate cuneiform joint is closed
•talus superimposes more than 1/3 of the calcaneus

Question 12

How do you assess medial rotation on an AP axial foot?

Answer 12

•MT based will demonstrate decreased superimposition
•medial and intermediate cuneiform joint is closed
•talus superimposes less than 1/3 of calcaneus

Question 13

Which way is a foot rotated for the oblique projection?

Answer 13

Medial

Question 14

What does a correct AP oblique foot look like?

Answer 14

•cuboid-cuneiform joint space is open
•3rd-5th inter-metatarsal joint spaces are open
•Sinus tarsi is visualized

Question 15

What anatomy is included in a AP oblique foot?

Answer 15

Phalanges, MTs, tarsals, calcaneus, soft tissue

Question 16

What degree of obliquity is used for an AP oblique foot?

Answer 16

30-60 degrees

Question 17

What is the centring for an AP axial and AP oblique foot?

Answer 17

3rd MT base

Question 18

What degree of obliquity should be used for a low arch in an AP oblique?

Answer 18

Around 30 degrees

Question 19

What degree of obliquity should be used for an AP oblique with a high arch?

Answer 19

Around 60 degrees

Question 20

How do you identify insufficient rotation in an AP oblique?

Answer 20

• if the tubercle of the 4th MT is not superimposed on itself ( visible) there is insufficient obliquity

Question 21

How do you identify excessive rotation of an AP oblique foot?

Answer 21

•the fifth proximal MT is superimposing the fourth MT tubercle
•fifth tuberosity is seen in profile

Question 22

How do you identify a correct lateral foot?

Answer 22

•MT heads are superimposed
•talar domes are aligned
•posterior half of distal tibia superimposes the fibula
•tibio-talar joint space is open

Question 23

Where is the anterior pretalar fat pad located?

Answer 23

Anterior ankle, anterior to distal tibia and talus

Question 24

Where is the posterior pericapsular fat pad located?

Answer 24

Posterior ankle, above posterior calcaneus, posterior to talus