unit 6 knowledge check 2

a patient comes for an evaluation of the longitudinal arch of the foot. what projections would be best?

ap and lateral weight-bearing

where is the adductor tubercle located?

posteriolateral aspect of the medial condyle of the femur

for the AP axial intercondylar view the CR will be entering:

½ inch distal to the apex of the patella

the purpose of the AP stress views of the ankle is to demonstrate:

possible joint separations or ligament tears

a radiograph of a PA axial projection using the camp-coventry method does not demonstrate the fossa well. the following positioning factors were used: patient prone, knee flexed 40-45, CR perp to the femur, and no rotation. what is the issue?

CR should be perpendicular to the lower leg

what projections would best demonstrate signs of osgood-schlatter disease?

AP and lateral knee

the profile appearance of the adductor tubercle and excessive superimposition of the fibular head/neck on a lateral knee indicate:

under rotation of the knee

how much is the foot dorsiflexed for the tangential projection of the sesamoid bones if the CR remains perpendicular to the IR?

15-20 degrees from vertical

the CR for an oblique knee will be:

½ inch distal to the apex of the patella

which projection of the knee best demonstrates the neck of the fibula free of superimposition?

AP medial oblique

which bone contains the sustentaculum tali?

calcaneus

for the settegast method, what is the angulation on the tube to the lower leg?

15-20 degrees

how many degrees is the leg bent for the settegast method?

90 degrees

what type of joint is the ankle? what type of movement does it have?

synovial, saddle

the lightfield should be extended anteriorly to include _______ on the lateral ankle

base of the fifth MT

what are the two arches of the foot?

longitudinal and transverse

what knee projection requires the use of a special IR holding device?

bilateral merchant method

on a lateral knee, you notice the fibula located more anteriorly than expected. what happened?

under rotation

for the holmblad method, how much is the patient leaning forward and flexing?

20, 70 degrees

for the camp coventry method, where will the CR enter?

popliteal crease

the articular facets of the proximal tibia are located on the _____, which is the entire surface of the proximal tibia

tibial plateau

if a patient measures more than 25cm at the ASIS for an AP knee, what angle should be put on the tube?

3-5 degrees cephalic

on a lateral knee, you notice the fibula located more posteriorly than expected. what happened?

over rotation

the lightfield should be extended anteriorly to include the ______ on the lateral calcaneus

base of the fifth MT

if you review a lateral foot and see that the navicular and the cuboid are barely superimposed, what happened?

foot was higher than the knee

another term for the intercondylar sulcus on the distal femur is the:

patellar surface

which lower leg bone is more posterior?

fibula

the calcaneus articulates with the talus and the:

cuboid

what is the angle for an AP knee on a patient who measures less than 18cm?

3-5 degrees caudal

a radiograph of an AP ankle reveals that the lateral joint space is not open and the superior/medial joint spaces are open. what is the issue?

nothing, this is an acceptable image

for the settegast method, what is the relationship of the lower leg to the IR?

90 degrees

a correctly positioned AP medial oblique foot should demonstrate:

third - fifth MTs free of superimposition

the only reason a PA knee would be ordered is to better visualize:

the patella

which knee oblique should demonstrate an open proximal tibiofibular joint space?

internal/medial

for the holmblad method, where will the CR enter?

the popliteal crease

what is the rotation of the leg to gain a true PA patella?

5 degrees internal

what tendon attaches directly to the tibial tuberosity?

patellar

what ligament is being tested in the eversion stress ankle view?

deltoid ligament

what ligaments are being tested in the inversion stress ankle view?

calcaneofibular ligament and possibly the anterior talofibular ligament

for the camp coventry method, what is the angle of the tube and relationship to lower leg?

45 degrees and perpendicular

which oblique knee will demonstrate a good image of the fibular head over the tibia?

external

how many degrees do the articular facets slope posteriorly in relation to the long axis of the tibia?

10-20 degrees

what is the flexion of the lateral knee?

20-30 degrees

where is the CR located for a lateral os-calcis?

1” inferior to the medial malleoli

for the merchant method, what is the angle on the tube?

30 degrees down from horizontal

the CR for an AP axial knee will be:

parallel to the tibial plateau

for the merchant method, how much are the knees flexed?

40 degrees

which condyle has the adductor tubercle?

medial

what is the name of the depression located on the posterior aspect of the distal femur?

intercondylar fossa/notch

what will the CR skim for the settegast method?

patellofemoral joint

what is the name of the large prominence located on the mid-anterior surface of the proximal tibia that serves as a distal attachment for the patellar tendon?

tibial tuberosity

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

5-10 degrees

for all intercondylar fossa images, how will the CR be in relation to the lower leg?

perpendicular

what is the angle for a lateral knee on a patient who measures less than 18cm?

3-5 degrees caudal

what is the angle for an AP knee on a patient who measures between 19-24?

perpendicular to IR, no angle

what type of joint is the distal tibiofibular joint?

fibrous

a radiograph of an AP knee reveals almost total superimposition of the fibular head and the proximal tibia. what must be done to correct it?

rotate the knee slightly medial

where is the CR for an axial calcaneus?

base of third MT

how much CR angulation to the long axis of the foot is required for the plantodorsal axial calcaneus?

40 degrees

what is the centering point for a lateral knee?

1” distal to the medial epicondyle

on a lateral knee, the smoother condyle is located more posteriorly. what error occurred?

over rotation

what is the centering point for the mediolateral calcaneus?

1” inferior to the medial malleoli

where is the centering point for a lateral patella?

mid patellofemoral joint

a patient comes in with an infection involving the sesamoid bones of the foot. what additional projection should be included in addition to the routine series?

tangential projection

what type of CR angle is required for the dorsoplantar axial weight bearing calcaneus?

45 degrees anteriorly

where should the CR emerge for the dorsoplantar axial weight bearing calcaneus?

the level of the base of the fifth MT