Chapter 6 - Knee - Foot

Question 1

Refer to the image below. What is the projection and anatomy of interest depicted?
a. AP calcaneus
b. AP axial calcaneus
c. superoinferior axial calcaneus
d. plantodorsal axial calcaneus

Answer 1

d. plantodorsal axial calcaneus

Question 2

An axial calcaneus projection with the patient’s foot in plantar flexion and the central ray angled 40 degrees proximally demonstrates all of the following except:
a. sustentaculum tali in profile
b. minimal distortion of the calcaneal tuberosity
c. 1st through 5th mettarsals are not projected to the side
d. closed talocalcaneal joint space

Answer 2

d. closed talocalcaneal joint space

Question 3

An AP (15- to 20-degree internal) oblique ankle image with accurate positioning demonstrates which of the following joints as open?
1. tibiotalar
2. talofibular
3. distal tibiofibular
4. medial talomalleolar

Answer 3

1, 2, and 4 only

Question 4

An AP ankle projection obtained with the patient’s leg in lateral rotation will demonstrate the tibia superimposing _____ than 1/2 of the fibula.
a. more
b. less

Answer 4

a. more

Question 5

An optimal AP axial foot projection demonstrates all of the following except:

a. overlap of the 2nd-5th metatarsal bases.
b. open TMT joint spaces.
c. an open medial-intermediate cuneiform joint space.
d. the calcaneus without talar superimposition.

Answer 5

d. the calcaneus without talar superimposition.

Question 6

An AP axial foot projection obtained with the foot laterally rotated demonstrates:
1. a closed medial-intermediate cuneiform joint space.
2. closed tarsometatarsal joint spaces.
3. the calcaneus with increased talar superimposition.
4. a decrease in metatarsal base superimposition.

Answer 6

1 and 3 only

Question 7

How is the patient positioned for the AP Oblique projection of the foot as imaged below:
a. Patient is correctly obliqued at 30 degrees
b. Patient is obliqued less than 30 degrees
c. Patient is obliqued more than 30 degrees

Answer 7

a. Patient is correctly obliqued at 30 degrees

Question 8

What joint spaces are open on an AP oblique foot projection with accurate positioning?
1. Second through fifth intermetatarsal joints
2. Navicular-cuneiform
3. Joint spaces surrounding the cuboid
4. Tarsometatarsal

Answer 8

1 and 3 only

Question 9

An AP oblique foot projection with accurate positioning demonstrates all of the following except:

a. open joint spaces around the cuboid.
b. open sinus tarsi.
c. open first and second intermetatarsal joint spaces.
d. no superimposition of the third through fifth metatarsal bases.

Answer 9

c. open first and second intermetatarsal joint spaces.

Question 10

On a lateral foot image with accurate positioning, the:
1. medial talar dome is demonstrated slightly superior to the lateral dome
2. tibiotalar joint space is open
3. metatarsal heads are superimposed
4. distal fibula superimposes the posterior half of the distal tibia

Answer 10

2, 3, and 4 only

Question 11

Which aspect of the foot is placed parallel with the IR for a routine lateral foot projection?
a. Dorsal
b. Lateral
c. Medial
d. Plantar

Answer 11

b. Lateral

Question 12

A lateral foot projection obtained on a patient whose leg was externally rotated (heel off IR) demonstrates the fibula situated too______________ to the tibia.
a. anterior
b. posterior

Answer 12

b. posterior

Question 13

Refer to the image below. What anatomy is labeled as letter E?

a. sustentaculum tali
b. navicular
c. tibiotalar joint
d. sinus tarsi

Answer 13

b. navicular

Question 14

Refer to the image below. What lower limb position is required to obtain this image?
a. 45-degree lateral rotation
b. 45-degree medial rotation
c. anatomic position
d. tibial epicondyles perpendicular to IR

Answer 14

b. 45-degree medial rotation

Question 15

An optimal lateral lower leg projection demonstrates all of the following except:

a. Femorotibial and tibiotalar joint spaces are open.
b. Tibia superimposes the posterior 1/2 of the fibula.
c. Fibular midshaft is demonstrated free of tibial superimposition; interosseous space demonstrated.
d. Posterior aspect of the tibia and fibula are aligned.

Answer 15

a. Femorotibial and tibiotalar joint spaces are open

Question 16

Refer to the image below. The anatomy labeled with letter F is the:
a. Intercondylar fossa
b. medial condyle
c. tibial tuberosity
d. fibular apex
e. intercondylar eminence

Answer 16

e. intercondylar eminence

Question 17

For an AP projection of the knee with accurate positioning,
1. an imaginary line connecting the femoral epicondyles is aligned parallel with the IR.
2. the intercondylar eminence is centered within the intercondylar fossa.
3. the fibular head is demonstrated about 0.5 inch distal to the tibial plateau.
4. the femoral condyles are symmetrical.

Answer 17

1, 2, 3, and 4

Question 18

An AP knee projection obtained with the knee internally (medially) rotated demonstrates:
1. a larger appearing medial femoral condyle than lateral condyle.
2. a larger appearing lateral femoral condyle than medial condyle.
3. the fibular head with increased tibial superimposition.
4. the fibular head with decreased tibial superimposition.

Answer 18

2 and 4 only

Question 19

An externally (laterally) rotated AP oblique knee projection that was taken with the knee rotated less than 45 degrees will demonstrate the:
a. fibula without tibial superimposition.
b. fibular head aligned with the anterior edge of the tibia.
c. fibula not fully superimposed by the tibia.
d. lateral condyle in profile.

Answer 19

c. fibula not fully superimposed by the tibia.

Question 20

A lateral knee image with accurate positioning demonstrates all of the following except:

a. an open femorotibial joint space
b. superimposed femoral condyles
c. an open patellofemoral joint space
d. the fibular head superimposing the anterior 1/4th of the tibia

Answer 20

d. the fibular head superimposing the anterior 1/4th of the tibia

Question 21

A lateral knee projection as imaged below demonstrates which of the following:
1. knee is overrotated
2. knee is underrotated
3. too much CR angulation
4. too little CR angulation

Answer 21

2 and 4 only

Question 22

A lateral knee projection demonstrates the medial femoral condyle anterior and proximal to the lateral femoral condyle. How was the positioning setup mispositioned for such an image to be obtained?
1. The central ray was angled too caudally.
2. The central ray was angled too cephalically.
3. The patient’s patella was positioned too close to the IR.
4. The patient’s patella was positioned too far away from the IR.

Answer 22

2 and 3 only