Routine Knee Quiz

Question 1

The central ray angulation should be 0 degrees for a patient who measures _____________ cm.

a.) =19
b.) >19
c.) <19
d.) 19 to 24

Answer 1

d.) 19 to 24

Question 2

The central ray angulation should be 3 to 5 degrees cephalad for a patient who measures _________ cm.

a.) >19
b.) <19
c.) 19 to 24
d.) >24

Answer 2

d.) >24

Question 3

Adequate obliquity on the medial oblique projection of the knee shows __________.

a.) patella superimposed over femur
b.) tibiofibular joint closed
c.) tibiofibular joint open
d.) head and neck of fibula superimposed

Answer 3

c.) tibiofibular joint open

Question 4

How much should the leg be rotated for the AP projection of the knee?

a.) 0 degrees
b.) 3 to 5 degrees medially
c.) 3 to 5 degrees laterally
d.) 10 degrees medially

Answer 4

b.) 3 to 5 degrees medially

Question 5

To determine the proper central ray angulation for an AP knee projection. The radiographer should measure the distance from the __________ to the __________.

a.) hip to tabletop
b.) distal femur to tabletop
c.) ASIS to tabletop
d.) ASIS to xray tube

Answer 5

c.) ASIS to tabletop

Question 6

Where is the central ray directed on the lateral projection of the knee?

a.) 1/2’’ distal to patella
b.) 1/2’’ distal to medial epicondyle
c.) 1’’ distal to medial epicondyle
d.) 1’’ proximal to medial condyle

Answer 6

c.) 1’’ distal to medial epicondyle

Question 7

How much should the knee be flexed on the lateral projection of the knee?

a.) 5 degrees
b.) 10 degrees
c.) 15 degrees
d.) 20 to 30 degrees

Answer 7

d.) 20 to 30 degrees

Question 8

Where is the central ray directed on the medial oblique projection of the knee?

a.) mid patella
b.) 1/2’’ superior to patella
c.) 1/2’’ distal to apex of patella
d.) 1’’ distal to apex of patella

Answer 8

c.) 1/2’’ distal to apex of patella

Question 9

Which of the following is the correct central ray angulation for the lateral angulation for the lateral projection of the knee?

a.) no angle
b.) 5 to 7 degrees cephalad
c.) 5 to 7 degrees caudad
d.) 10 degrees cephalad

Answer 9

b.) 5 to 7 degrees cephalad

Question 10

The central ray angulation should be 3 to 5 degrees caudad for a patient who measures ________ cm.

a.) =19
b.) >19
c.) <19
d.) 19 to 24

Answer 10

c.) <19

Question 11

Where should the central ray be directed on the AP projection of the knee?

a.) mid patella
b.) 1/2’’ distal to apex of patella
c.) 1/2’’ proximal to patella
d.) 1’’ distal to patella

Answer 11

b.) 1/2’’ distal to apex of patella

Question 12

What is the proper leg rotation for a true medial oblique projection of the knee?

a.) 3 to 5 degrees
b.) 10 degrees
c.) 30 degrees
d.) 45 degrees

Answer 12

d.) 45 degrees