Quiz 3

Question 1

An optimal lateral knee projection demonstrates

Answer 1

superimposed femoral condyles.

Question 2

For an AP oblique second toe projection, the toe is rotated

Answer 2

45 degrees medially.

Question 3

Which aspect of the foot is placed parallel with the IR for a routine lateral foot projection?

Answer 3

Lateral

Question 4

A poorly positioned 45-degree AP oblique ankle projection demonstrates the calcaneus obscuring the distal aspect of the lateral mortise and the distal fibula. How should the positioning setup be adjusted to obtain an optimal projection?

Answer 4

Dorsiflex the foot to a 90-degree angle with the lower leg.

Question 5

An optimal AP axial foot projection demonstrates all the following except

Answer 5

the calcaneus without talar superimposition.

Question 6

An internally rotated AP oblique knee projection demonstrates the tibia partially superimposed over the fibular head. How should the positioning setup be adjusted to obtain and optimal projection?

Answer 6

Increase the degree of internal rotation.

Question 7

Where should the central ray be centered for an AP axial projection of the foot?

Answer 7

Base of the third metatarsal

Question 8

An AP hip projection with accurate positioning demonstrates the

1. lesser trochanter in profile.
2. greater trochanter in profile.
3. femoral neck without foreshortening.
4. sacrum rotated toward the affected hip.

Answer 8

2 and 3 only

Question 9

A less than optimal AP hip projection demonstrating the lesser trochanter in profile

Answer 9

will also demonstrate a foreshortened femoral neck.

Question 10

An externally rotated AP oblique knee projection that was taken with the knee rotated more than 45 degrees will demonstrate the

Answer 10

fibula located in the center of the tibia.

Question 11

The (above or below) placement of the patella in relationship to the femorotibial joint space on an AP knee projection is or can be affected by ( Hint: Which of the 2 out of the 4 options below)

1. patellar (dislocation) subluxation.
2. knee rotation.
3. knee flexion.
4. foot inversion.

Answer 11

1 and 3 only

Question 12

A cross-table lateromedial knee projection demonstrates the medial femoral condyle distal to the lateral femoral condyle. To obtain an optimal projection,

Answer 12

adduct the patient’s leg.

Question 13

Which of the following statements is not true about an AP pelvis projection obtained with the patient rotated toward the right hip?

Answer 13

The left obturator foramen will be narrower than the right foramen.

Question 14

An AP pelvis projection obtained with the patient rotated toward the left hip demonstrates

1. the symphysis pubis rotated toward the left hip.
2. a narrower right iliac wing.
3. a narrower left obturator foramen.
4. the sacrum and coccyx rotated toward the right hip.

Answer 14

1, 2, 3, and 4

Question 15

The central ray angulation used for AP axial sacroiliac joints projections

Answer 15

produces an image without sacroiliac joint foreshortening.

Question 16

A less than optimal axial calcaneus projection demonstrates an obscured talocalcaneal joint space and an elongated calcaneus tuberosity. The projection was obtained with the

Answer 16

patient’s foot dorsiflexed beyond the required vertical position.

Question 17

An AP projection of the sacroiliac joints taken with insufficient central ray angulation will

Answer 17

demonstrate the inferior sacrum without symphysis pubis superimposition.

Question 18

If the medial talar dome were positioned distal to the lateral talar dome on a lateral foot projection, which of the following is true?

Answer 18

The patient’s proximal tibia was elevated.

Question 19

The tangential knee projection (Merchant method) which requires a special film holder can also be described as a(n) ____ projection.

Answer 19

superoinferior

Question 20

A less than optimal AP axial toe projection demonstrates more soft tissue width on the lateral side than on the medial side of the phalanges. Which of the following is true about this projection?

Answer 20

The toe needs to be rotated laterally to obtain an optimal projection.

Question 21

An accurately positioned lateral foot projection demonstrates all the following except

Answer 21

the distal metatarsals at the center of the exposure field.