Chapter 6: Toes/Foot/Ankle

Question 1

What anatomy is demonstrated on the AP axial projection of the toes?
(1) Phalanges
(2) Tarsals
(3) Open IP and MTP joint spaces

Answer 1

1 and 3

Question 2

How can the positioning setup procedure be adjusted for an AP axial foot projection to demonstrate uniform image density throughout the toes and foot areas?

Answer 2

Place a compensating filter over the toes.

Question 3

What type of CR angle is required for the AP axial projection of the foot?

Answer 3

10 degrees posteriorly (towards heel)

Question 4

An optimal AP axial foot (non weight bearing) projection demonstrates all the following except
a. an open medial-intermediate cuneiform joint space.
b. uniform density across all metatarsals
c. the calcaneus without talar superimposition.
d. open TMT joint spaces.

Answer 4

C

Question 5

With which projection are the cuboid and its articulations best demonstrated?

Answer 5

AP oblique foot in medial rotation position

Question 6

On a lateral foot image with accurate positioning, the ___ and ___ are seen in profile

Answer 6

tuberosity; base of 5th MT

Question 7

For a 15- to 20-degree internally rotated AP oblique ankle projection, the
leg is internally rotated until the ___ is ___ with the IR

Answer 7

intermalleolar line; parallel

Question 8

A 15- to 20-degree internally rotated AP oblique ankle projection with accurate positioning demonstrates which of the following joints as open spaces?
- Tibiotalar
- Lateral mortise
-Medial mortise
-all of the above

Answer 8

All of the above

Question 9

When positioning a non weight bearing lateral ankle projection, the
1. medial and lateral malleoli are positioned directly on top of each other.
2. lateral foot surface is aligned parallel with the IR.
3. lower leg is parallel with the imaging table (IR)
4. central ray is centered to the medial malleolus.

Answer 9

2, 3 and 4

Question 10

A non weight bearing lateral ankle projection with accurate positioning demonstrates
1. an open tibiotalar joint.
2. domes aligned
3. 1 inch (2.5 cm) of the fifth metatarsal base.
4. posterior half of the tibia superimposes fibula

Answer 10

1, 2, 3 and 4

Question 11

Which of the following is true with respect to axial calcaneal projections?
1. The image demonstrates an open talocalcaneal joint space.
2. The foot is flexed 90 degrees to the lower leg and rotated slightly laterally.
3. A 40-degree central ray is directed proximally.
4. The central ray is centered to the head of the fifth metatarsal.

Answer 11

1 and 3

Question 12

An axial calcaneus projection with the patient’s foot in correct dorsal flexion and the central ray angled 40 degrees proximally demonstrates
1. an elongated calcaneal tuberosity.
2. a foreshortened calcaneal tuberosity.
3. an open talocalcaneal joint space.
4. sustentaculum tali in profile

Answer 12

3 and 4

Question 13

An AP axial foot projection obtained with the foot laterally rotated demonstrates
1. an increase in metatarsal base superimposition
2. the calcaneus with decreased talar superimposition
3. the calcaneus with increased talar superimposition.
4. a decrease in metatarsal base superimposition.

Answer 13

1 and 3

Question 14

An AP ankle image obtained with the patient’s leg in lateral rotation will demonstrate which of the following?
1.A closed medial mortise
2.tibia superimposing more than half of the fibula
3.An open medial mortise
4. tibia superimposing all of the fibula

Answer 14

1 and 2

Question 14

A lateral foot image obtained in a patient whose leg was rotated externally (heel off IR) demonstrates:

Answer 14

anterior fibula is demonstrated posterior to mid tibia

Question 15

A lateral ankle image in which the leg is internally rotated will demonstrate medial malar dome ___ to lateral talar dome

Answer 15

posterior

Question 16

Which of the following positioning setup procedures must be completed to obtain open joint spaces on an AP Axial foot image?
-The patient’s foot is positioned flat against the IR.
-Long axis of foot aligned with long axis of IR.
-The central ray is angled 10 degrees posteriorly
-All of the above

Answer 16

All of the above

Question 16

Which of the following pertains to a lateral non weight bearing ankle image that demonstrates the lateral talar dome distal to the medial talar dome?
- The patient was imaged with the distal lower leg elevated.
- The patient was imaged with the proximal lower leg elevated.

Answer 16

The patient was imaged with the distal lower leg elevated.

Question 17

T/F: For the lateral foot, the plantar surface does not have to be perpendicular to the IR.

Answer 17

False

Question 18

T/F: When the foot is rotated correctly for an AP oblique foot projection all of the metatarsals are superimposed .

Answer 18

False

Question 19

Which tarsal bone articulates with the superior aspect of the calcaneus?

Answer 19

Talus

Question 20

Which of the tarsal bones is most lateral?

Answer 20

Cuboid

Question 21

The lateral cuneiform articulates with which of the following bones of the foot? 1. 3rd metatarsal
2. Cuboid
3. Navicular

Answer 21

1, 2, and 3

Question 22

The cuboid articulates with the ___ and ___ metatarsal

Answer 22

calcaneus; fifth

Question 23

The foot consists of ________ bones.

Answer 23

26

Question 24

The heads of the metatarsals articulate with:

Answer 24

The phalanges

Question 25

The medial malleolus is located at the:

Answer 25

distal aspect of the tibia

Question 26

The process on the distal aspect of the fibula is termed the:

Answer 26

Lateral malleolus

Question 27

The small foramen located between the talus and calcaneus is the:

Answer 27

Sinus tarsi

Question 28

posterior surface of the foot is termed:

Answer 28

Dorsal

Question 29

The talus articulates with the:
1. Calcaneus
2. Fibula
3. Tibia

Answer 29

1, 2 and 3