LRA-220 FINAL REVIEW

Question 1

Where should the central ray be directed for a lateral calcaneus radiograph?

Answer 1

1 inch distal to the medial malleolus

Question 2

Which projection is preferable for examining the fibular head of a fractured lower limb?​

Answer 2

Medial oblique knee

Question 3

A radiographic appearance of a well-circumscribed lucency within bones describes:

Answer 3

A bone cyst

Question 4

How much central ray (CR) angulation (if any) should be used for an AP projection of the toes?

Answer 4

10-15 degrees towards the calcaneus (cephalic)

Question 5

What is the routine to be performed for a study of the second toe?

Answer 5

• AP
• AP oblique with medial rotation
• Lateromedial projection

Question 6

How much is the foot dorsiflexed with the tangential projection for the sesamoid bones if the CR remains perpendicular to the image receptor?

Answer 6

10-15 degrees from vertical

Question 7

A lateral knee radiograph that is over rotated toward the image receptor can be recognized by which of the following?​

Answer 7

The fibular head will appear less superimposed by the tibia then a true lateral

Question 8

To properly visualize the joint spaces with the AP projection of the foot, the CR must be:​

Answer 8

Perpendicular to the metatarsals

Question 9

​Which joint space should be open or almost open for a well-positioned AP oblique knee projection with medial rotation?

Answer 9

Proximal tibiofibular joint

Question 10

​Which position of the foot will best demonstrate the lateral (third) cuneiform?​

Answer 10

AP oblique with medial rotation

Question 11

Which joint surfaces of the ankle joint are open with an AP projection of the ankle?

Answer 11

Medial and superior

Question 12

What is one advantage of the lateromedial projection of the foot?

Answer 12

The foot assumes a more true lateral position

Question 13

Which joint surfaces of the ankle joint are open with an AP projection of the ankle?

Answer 13

Medial and superior

Question 14

To ensure that both joints are included on an AP projection of the tibia and fibula on an adult, the technologist should:​

Answer 14

Turn the image receptor diagonally

Question 15

What is the major disadvantage of using 45° of flexion for the mediolateral projection of the knee?​

Answer 15

Draws the patella into the intercondylar sulcus

Question 16

What is the amount of abduction of the femurs recommended for an AP bilateral frog-leg projection?​

Answer 16

40-45 degrees

Question 17

Which of the following positions will best demonstrate signs of developmental dysplasia of the hip?​

Answer 17

Bilateral frog leg method

Question 18

A radiograph of a AP mortise projection of the ankle reveals that the lateral malleolus is slightly superimposed over the talus and the lateral joint space is not open. What is most likely the cause for this radiographic outcome?​

Answer 18

Insufficient medial rotation of the foot and ankle

Question 19

How much flexion of the knee is recommended for the lateral projection of the patella?​

Answer 19

5-10 degrees or less

Question 20

A radiograph of an AP pelvis reveals that the right iliac wing is foreshortened as compared with the left side. What specific positioning problem is present on this radiograph?​

Answer 20

• The patient is rotated toward the left
• Left posterior oblique (LPO)

Question 21

The medial Malleolus is located on which bone?

Answer 21

Tibia

Question 22

The lateral malleolus is located on which bone?

Answer 22

Fibula

Question 23

Which of the following projections of the ankle will best demonstrate the open joint space of the lateral aspect of the ankle joint?

Answer 23

AP Mortise Ankle

Question 24

True or False: the foot must be force dorsiflexed so that the long axis of the foot is perpendicular to the image receptor for AP and Mortise projections of the ankle

Answer 24

False

Question 25

True or false: a correctly positioned lateral ankle will demonstrate the lateral malleolus superimposed over the posterior half of the tibia

Answer 25

True

Question 26

What CR angulation is required for the AP oblique projection of the foot?

Answer 26

0 degrees

Question 26

A radiograph of an AP ankle projection reveals that the lateral joint space is not open (lateral malleolus is partially superimposed by the talus). The superior and medial joint spaces are open. What should the technologist do to correct this problem and improve the image?

Answer 26

Nothing; this is an acceptable image

Question 27

When positioning for a tunnel view, what angle do I use on the tube?

Answer 27

10 degrees caudad

Question 27

If the part of my patient is between 19-24 cm, what angle do I use on the tube?

Answer 27

0 degrees

Question 28

True or false: when positioning for a lateral knee, one should flex the knee 50-60 degrees

Answer 28

False

Question 29

If part of my patient is between 25 cm and above, what angle do I use on the tube?

Answer 29

5 degrees cephalic

Question 30

What is the CR for an AP knee?

Answer 30

Half an inch (.5) below/distal to the apex of the patella

Question 31

How much does one flex the knee for a Settegast method?

Answer 31

90 degrees

Question 32

How much CR angulation to the long axis of the foot is required for the plantodorsal (axial) projection of the calcaneus?

Answer 32

40 degrees

Question 33

Where is the CR placed for an AP Axial Calcaneus?

Answer 33

Base of the 3rd metatarsal

Question 34

What is the angle on the tube for a lateral calcaneus?

Answer 34

0 degrees

Question 35

Where do you center for an AP femur?

Answer 35

Midfemur

Question 36

Which projection of the knee will best demonstrate the neck of the fibula without superimposition?

Answer 36

AP Oblique with medial rotation

Question 37

What joint is considered to be immovable?

Answer 37

Synarthrodial