Knee

Question 1

Measurements between the ASIS and the tabletop:

1. Less than 19 cm
2. 19-24 cm
3. Greater than 24 cm

Answer 1

1. 3-5 degrees caudal
2. Perpendicular CR
3. 3-5 degrees cephalic

Question 2

AP Projection (essential):

• Place pt in __1__ position
• Center IR __2__ below the __3__
• Adjust leg so that __4__ are parallel with IR (patella will lie slightly medial)
• CR __5__ inferior to the patellar apex

Answer 2

1. Supine
2. 1/2”
3. Apex
4. Femoral epicondyles
5. 1/2”

Question 3

Evaluation Criteria for an AP knee:

1. Open _____
2. Patella completely superimposed over ____
3. No rotation of the ____ and ____
4. Slight superimposition of the ______

Answer 3

1. Femorotibial
2. Femur
3. Femur and tibia
4. Fibular head

Question 4

The only reason to do a PA Projection of the knee?

Answer 4

To put patella closer to the IR

Question 5

Three method names that may be performed to demonstrate the intercondylar fossa of the knee/femur joint

Answer 5

1. Holmblad
2. Camp Coventry
3. Beclere

Question 6

3 projections utilized for a routine patella series:

Answer 6

1. PA
2. Lateral (Mediolateral)
3. Tansgental (Settegast Method)

Question 7

What order should routine knee be performed and why?

Answer 7

PA, lateral, and sunrise to identify a fx before moving pt.

Question 8

2 things demonstrated on an axial patella image

Answer 8

1. Vertical fx
2. Medial and lateral condyle

Patella in profile
Patella-femoral space

Question 9

Method that will demonstrate the majority of the patella without having superimposition

Answer 9

Kuchendorf

Question 10

The axial patella will demonstrate _____ fractures of the patella

Answer 10

Vertical

Question 11

The lateral patella will demonstrate ____ fractures of the patella

Answer 11

Transverse

Question 12

For a prone pt with their lower leg flexed 50 degrees up from the table and their for resting on a support to demonstrate the intercondylar fossa, the CR angle should be ______

Answer 12

50 degrees caudal

Question 13

When the AP medial oblique projection of the knee is performed the patella will be seen

Answer 13

Over the medial femoral condyle

Question 14

For proper positioning of methods used to demonstrate the intercondylar fossa the CR should be ______

Answer 14

Perpendicular to lower leg

Question 15

Flex the knee joint 5-10 degrees

Answer 15

Lateral patella

Question 16

Hyperflex the knee joint

Answer 16

Settegast

Question 17

Flex the knee joint 40 degrees

Answer 17

Camp conventry

Question 18

Adjust intercondylar plane parallel to the IR

Answer 18

PA patella

Question 19

Flex the knee joint 60 degrees

Answer 19

Beclere method

Question 20

Adjust femur forward 20 degrees

Answer 20

Holmblad

Question 21

The AP upright projection weight bearing exam of the knee will require the CR to be placed

Answer 21

Horizontal

Question 22

The AP upright position/projection will demonstrate _______

Answer 22

Tibiofemoral joint space narrowing

Question 23

The proper CR angle for the pt size for the AP projection knees:

1. 19-24 cm
2. <24 cm
3. > 19 cmap

Answer 23

1. Perpendicular to IR
2. 3-5 degrees Cephalic
3. 3-5 degrees caudal

Question 24

The inferior portion of the patella is the _____

Answer 24

Apex

Question 25

The medial and lateral AP oblique projections of the knee require the leg to be rotated _____ degrees

Answer 25

45

Question 26

The CR should be directed to __1__ inferior to the __2__ for the AP and AP oblique projections of the knee.

Answer 26

1. 1/2" | 2. Apex

Question 27

The CR should be directed 1" distal the the __1__ for a lateral knee

Answer 27

Medial epicondyle

Question 28

Which femoral condyle is lower?

Answer 28

Medial (5-7 degrees)

Question 29

How many degrees of flexion is required for the routine lateral knee?

Answer 29

20-30

Question 30

What method for the intercondylar fossa utilizes a curved or built up IR?

Answer 30

Beclere Method

Question 31

When performing the axial/tangential projections of the patella, the CR will always be ____ to the ____

Answer 31

Parallel to the patellar

Question 32

What is the primary purpose for performing the PA patella feather that AP?

Answer 32

Puts patella closer to the IR

Question 33

The term tangential means what?

Answer 33

Skimming

Question 34

When performing the AP projection, the CR should be __1__ to the joint space and project the patella __2__ of the joint space

Answer 34

1. Parallel | 2. Up and out

Question 35

Name two layman terms that may be seen on orders for the tangential axial patella

Answer 35

- sunrise - sunset - sky line

Question 36

The degree/angle formed between the following structures when performing the Holmblad Method 1. Degrees between femur and IR 2. Degrees between femur and lower leg 3. Degrees between CR and lower leg 4. Degrees between CR and femur

Answer 36

1. 70 2. 110 3. 90 4. 20

Question 37

How many degrees of flexion should be performed for the routine lateral patella and why?

Answer 37

10 degrees; increasing flexion will reduce the patellofemoral space; prevents fx separation

Question 38

The projection utilized for a lateral knee or patella should be ____

Answer 38

Mediolateral

Question 39

PA Weight Bearing Knee Radiographs are AKA

Answer 39

Rosenberg Method

Question 40

AP oblique, lateral rotation: CR __1__ inferior to patella apex CR angle dependent on measurement __2__ superimposed over the lateral half of the __3__ Margin of patella projected slightly beyond edge of __4__ femoral condyle

Answer 40

1. 1/2" 2. Fibula 3. Tibia 4. Lateral

Question 41

AP oblique, medial rotation evaluation: - __1__ and __2__ separated - Margin of patella slightly beyond __3__ side of femoral condyle

Answer 41

1. Tibia 2. Fibula 3. Medial