Knee Review

Question 1

The medial oblique knee will require the intercondylar plane of the femur to be –1– degrees from the IR.

Answer 1

45 degrees

Question 2

Which of the following criteria is true for the lateral oblique knee position?

Answer 2

The tibia and fibula will be superimposed

Question 3

The intercondylar fossa is best demonstrated when the –1–.

Answer 3

CR is perpendicular to the tibia

Question 4

The sunrise or axial image of the patella may best demonstrate the presence of –1–.

Answer 4

vertical fractures

Question 5

The CR should be directed to a point –1– for an AP projection of the knee.

Answer 5

1/2 inch below the patellar apex

Question 6

The erect tangential axial patella will require a –1– CR projection.

Answer 6

Superoinferior

Question 7

The –1– Method may use a curved or elevated cassette to demonstrate the intercondylar fossa.

Answer 7

Beclere

Question 8

The weight bearing AP projection knee will not require the use of a CR angle so the –1–.

Answer 8

Degenerative joint changes are less distorted.

Question 9

When positioning a patient in the Camp Coventry Method and the degree of leg flexion is 43 degrees, the CR degree and direction should be –1–.

Answer 9

43 degrees caudal

Question 10

The original Settegast Method requires –1–.

Answer 10

Hyperflexion of the affected knee

Question 11

The lateral knee will best demonstrate which of the following?

Answer 11

The open patellofemoral joint space

Question 12

The lateral patella should always be performed prior to the –1– in a patella series.

Answer 12

Axial projection

Question 13

What is the proper degree of flexion for the lateral knee position/projection?

Answer 13

20-30 degrees

Question 14

For demonstration of the axial patella the CR should remain –1–.

Answer 14

Parallel to the patella

Question 15

The Holmblad Method is used to demonstrate –1–.

Answer 15

Intercondylar fossa of the femur

Question 16

The posterior surface of the knee area is called –1–.

Answer 16

popiteal

Question 17

This device should be used on patient parts that measure greater than 10 cm.

Answer 17

grid

Question 18

Why is the PA projection utilized for imaging the patella rather than an AP?

Answer 18

It puts the patella closer to the IR to decrease mag and it increases recorded detail.

Question 19

List 3 Method names/views that demonstrate the axial patella:

Answer 19

1. Merchant
2. Settegast
3. Houghston

Question 20

List 2 important instructions to give patients when performing weight bearing knee exams:

Answer 20

1. Take your shoes off

2. Stand with equal weight on both feet

Question 21

Which routine position/projection of the knee will demonstrate a separation of the tibia and fibula?

Answer 21

AP Oblique internal rotation

Question 22

List and explain the CR angulations utilized when performing the AP projection:

Answer 22

19 to 24 cm (avg. pelvis)- perpendicular
greater than 24 cm (large pelvis)- 3-5 degrees cephalic
less than 19 cm (thin pelvis)- 3-5 degrees caudal
*to open joint spaces

Question 23

The purpose of angling the CR 5-7 degrees cephalic for the lateral projection knee radiograph is to –1–.

Answer 23

open up to joint space because the medial condyle hangs 5-7 degrees lower than the lateral condyle and to superimpose condyles.

Question 24

What is the degree of obliquity for an oblique knee?

Answer 24

45 degrees

Question 25

What is the pointed distal projection of the knee called?

Answer 25

Apex

Question 26

Give an example of how you, the radiographer, can look at a lateral knee image and determine if it is a passable radiograph?

Answer 26

If the patella is in profile and I am within my “s” number range.

Question 27

The term varus means –1–.

Answer 27

knock knees- knees bend inward

Question 28

The term valgus means –1–.

Answer 28

bow legged- knees bent outward

Question 29

List 3 Method names that will demonstrate the intercondylar fossa.

Answer 29

Camp Coventry
Holmblad
Belcere

Question 30

What is the degree difference between the CR and the femur when performing the Holmblad Method?

Answer 30

20 degrees

Question 31

What is the degree difference between the IR and the femur when performing the Holmblad Method?

Answer 31

70 degrees

Question 32

What is the degree difference between the femur and the lower leg when performing the Holmblad Method?

Answer 32

110 degrees

Question 33

The Camp Coventry Method requires knee flexion of –1–.

Answer 33

40-50 degrees

Question 34

position:

Answer 34

AP knee with internal rotation

Question 35

position:

Answer 35

AP knee with external rotation

Question 36

structure dem:

Answer 36

Patella in profile/ vertical fractures of the patella

Question 37

Method

Answer 37

Camp Coventry

Question 38

Structure dem

Answer 38

intercondylar fossa

Question 39

The medial shelf of bone on the os calcis that helps to support the longitudinal arch is the –1–.

Answer 39

sustentacilum tali

Question 40

The Method that demonstrates 2/3 of the patella in an oblique position with mostly no superimposition is –1–.

Answer 40

Kuchendorf

Question 41

The tarsal bone that is lies directly posteriorly to the cuneiforms is the –1–.

Answer 41

navicular

Question 42

What is the Method that demonstrates the anterior surface of the carpal bones?

Answer 42

Gaynor-Hart