LRA 220 CORRECT FINALS ANSWERS AND
QUESTIONS SET A+
✔✔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?
Insufcient medial rotation of the foot and ankle
Excessive medial rotation of the foot and ankle
Excessive plantar exion of the foot and ankle
Excessive dorsiexion of the foot and ankle - ✔✔insufficient medial rotation of the foot
and ankle
✔✔The foot must be force dorsiexed so that the long axis of the foot is perpendicular to
the image receptor for AP and mortise projections of the ankle.
False
True - ✔✔false
✔✔A correctly positioned lateral ankle will demonstrate the lateral malleolus
superimposed over the posterior half of the tibia.
True
False - ✔✔true
✔✔For the AP weight-bearing knee projection on an average patient, the CR should be:
10° caudad.
5° to 10° cephalad
perpendicular to the image receptor.
CR perpendicular to the image receptor but increase SID to 60 inches (153 cm). -
✔✔perpendicular to the image receptor.
✔✔Which of the following knee projections requires the use of a special IR holding
device?
Bilateral Merchant method
Camp-Coventry method
Béclere method
, Hughston method - ✔✔bilateral merchant method
✔✔How much knee exion is required for the weight-bearing PA axial projection
(Rosenberg method) of the knee?
None; the knee is fully extended.
30° flexion
45° flexion
50° to 60° flexion - ✔✔45
✔✔Which projection of the knee will best demonstrate the neck of the bula without
superimposition?
AP oblique with medial rotation AP
Lateral
AP oblique with lateral rotation - ✔✔AP oblique with medial rotation AP
✔✔Which special position of the knee requires that the patient be placed supine with
40° exion of knee with the CR angled 30° from the long axis of the femur?
Bilateral Merchant method
PA axial, Camp-Coventry method
PA axial, Holmblad method Tangential, Hughston method - ✔✔Bilateral Merchant
method
✔✔Which of the following projections of the patella requires the patient to be placed in a
prone position, a 55° exion of the knee, and a 15° to 20° angle of the CR?
Hughston method
Merchant method
Settegast method
Holmblad method - ✔✔Hughston method
✔✔An inammatory condition involving the anterior, proximal tibia - ✔✔Osgood-Schlatter
disease
✔✔Sprains and/or fractures involving the bases of the rst and second metatarsals -
✔✔Lisfranc joint injury
✔✔Accumulated uid in the joint cavity - ✔✔Joint effusion
✔✔Inherited type of arthritis commonly affecting males, frequently begins at rst
metatarsophalangeal joint - ✔✔gout
✔✔Benign, neoplastic bone lesion due to overproduction of bone at a joint (usually the
knee) - ✔✔Exostosis
QUESTIONS SET A+
✔✔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?
Insufcient medial rotation of the foot and ankle
Excessive medial rotation of the foot and ankle
Excessive plantar exion of the foot and ankle
Excessive dorsiexion of the foot and ankle - ✔✔insufficient medial rotation of the foot
and ankle
✔✔The foot must be force dorsiexed so that the long axis of the foot is perpendicular to
the image receptor for AP and mortise projections of the ankle.
False
True - ✔✔false
✔✔A correctly positioned lateral ankle will demonstrate the lateral malleolus
superimposed over the posterior half of the tibia.
True
False - ✔✔true
✔✔For the AP weight-bearing knee projection on an average patient, the CR should be:
10° caudad.
5° to 10° cephalad
perpendicular to the image receptor.
CR perpendicular to the image receptor but increase SID to 60 inches (153 cm). -
✔✔perpendicular to the image receptor.
✔✔Which of the following knee projections requires the use of a special IR holding
device?
Bilateral Merchant method
Camp-Coventry method
Béclere method
, Hughston method - ✔✔bilateral merchant method
✔✔How much knee exion is required for the weight-bearing PA axial projection
(Rosenberg method) of the knee?
None; the knee is fully extended.
30° flexion
45° flexion
50° to 60° flexion - ✔✔45
✔✔Which projection of the knee will best demonstrate the neck of the bula without
superimposition?
AP oblique with medial rotation AP
Lateral
AP oblique with lateral rotation - ✔✔AP oblique with medial rotation AP
✔✔Which special position of the knee requires that the patient be placed supine with
40° exion of knee with the CR angled 30° from the long axis of the femur?
Bilateral Merchant method
PA axial, Camp-Coventry method
PA axial, Holmblad method Tangential, Hughston method - ✔✔Bilateral Merchant
method
✔✔Which of the following projections of the patella requires the patient to be placed in a
prone position, a 55° exion of the knee, and a 15° to 20° angle of the CR?
Hughston method
Merchant method
Settegast method
Holmblad method - ✔✔Hughston method
✔✔An inammatory condition involving the anterior, proximal tibia - ✔✔Osgood-Schlatter
disease
✔✔Sprains and/or fractures involving the bases of the rst and second metatarsals -
✔✔Lisfranc joint injury
✔✔Accumulated uid in the joint cavity - ✔✔Joint effusion
✔✔Inherited type of arthritis commonly affecting males, frequently begins at rst
metatarsophalangeal joint - ✔✔gout
✔✔Benign, neoplastic bone lesion due to overproduction of bone at a joint (usually the
knee) - ✔✔Exostosis
