LRA 220 ANSWERS AND QUESTIONS SET A+
✔✔A lateral knee radiograph that is over rotated toward the IR can be recognized by
which of the following?
The fibular head will appear more superimposed by the tibia than a true lateral
The fibular head will appear less superimposed by the tibia than a true lateral - ✔✔The
fibular head will appear less superimposed by the tibia than a true lateral
✔✔You are taking an AP projection of the tibia and fibula on an adult and need to
ensure that both joints are included, what you should do?
Increase SID to 60 inches
Use the bucky
Turn the IR diagonally - ✔✔Turn the IR diagonally
✔✔How much is the foot dorsiflexed with the tangential sesamoid bone projection if the
CR remains perpendicular to IR?
15-20 degrees from vertical
no flexion
5-7 degrees from vertical
30-45 degrees from vertical - ✔✔15-20 degrees from vertical
✔✔what CR angulation (if any) is required for an AP projection of the toes
CR perpendicular to IR
5 degree toward calcaneous
10-15 toward calcaneous
20-25 toward calcareous - ✔✔10-15 toward calcaneous
✔✔When taking multiple exposures of on one IR cassette, what should the technologist
place on the IR in the unexposed area?
Lead masking
Nothing
The opposite body part for comparison - ✔✔Lead masking
✔✔What is one advantage of the lateromedial projection of the foot?
It is more comfortable for the patient
, It better demonstrates the inter tarsal joints
The foot assumes a more true lateral position
It opens up the subtler joint - ✔✔The foot assumes a more true lateral position
✔✔Which projections will best demonstrate Osgood schlatters
AP and lateral Knee
AP, lateral oblique knee
AP weightbearing knees
Axial and lateral calcaneous - ✔✔AP and lateral knee
✔✔An AP pelvis projection reveals that the lesser trochanters are not well visualized.
What should you do?
Rotate the lower limb internally 15-20 degrees
Do nothing, this is acceptable
Ensure ASIS is an equal distance from the TT
Angle 10-15 cephalic - ✔✔Do nothing, this is acceptable
✔✔How much flexion of the Knee is recommended for the lateral projection of the
patella?
5-10 or less
20-30
35-40
45-50 - ✔✔5-10 or less
✔✔You have male patient and need to shield the gonads, where should you place your
lead shield?
ASIS
Ischial spine
inferior margin of symphysis pubis
no shielding is allowed for males - ✔✔Inferior margin of symphysis pubis
✔✔Which joint surfaces of the ankle are open W/ an AP projection of the ankle?
Medial and superior
lateral and medial
superior and lateral
medial, superior, and lateral - ✔✔medial and superior
✔✔A correctly positioned AP 45 degree medial obl ankle projection may also
demonstrate ________?
A base of the 5th fracture
Distal fibula slightly superimposed over the tibia
calcaneous in profile
sustencaculum tail - ✔✔A base of the 5th fracture
✔✔A lateral knee radiograph that is over rotated toward the IR can be recognized by
which of the following?
The fibular head will appear more superimposed by the tibia than a true lateral
The fibular head will appear less superimposed by the tibia than a true lateral - ✔✔The
fibular head will appear less superimposed by the tibia than a true lateral
✔✔You are taking an AP projection of the tibia and fibula on an adult and need to
ensure that both joints are included, what you should do?
Increase SID to 60 inches
Use the bucky
Turn the IR diagonally - ✔✔Turn the IR diagonally
✔✔How much is the foot dorsiflexed with the tangential sesamoid bone projection if the
CR remains perpendicular to IR?
15-20 degrees from vertical
no flexion
5-7 degrees from vertical
30-45 degrees from vertical - ✔✔15-20 degrees from vertical
✔✔what CR angulation (if any) is required for an AP projection of the toes
CR perpendicular to IR
5 degree toward calcaneous
10-15 toward calcaneous
20-25 toward calcareous - ✔✔10-15 toward calcaneous
✔✔When taking multiple exposures of on one IR cassette, what should the technologist
place on the IR in the unexposed area?
Lead masking
Nothing
The opposite body part for comparison - ✔✔Lead masking
✔✔What is one advantage of the lateromedial projection of the foot?
It is more comfortable for the patient
, It better demonstrates the inter tarsal joints
The foot assumes a more true lateral position
It opens up the subtler joint - ✔✔The foot assumes a more true lateral position
✔✔Which projections will best demonstrate Osgood schlatters
AP and lateral Knee
AP, lateral oblique knee
AP weightbearing knees
Axial and lateral calcaneous - ✔✔AP and lateral knee
✔✔An AP pelvis projection reveals that the lesser trochanters are not well visualized.
What should you do?
Rotate the lower limb internally 15-20 degrees
Do nothing, this is acceptable
Ensure ASIS is an equal distance from the TT
Angle 10-15 cephalic - ✔✔Do nothing, this is acceptable
✔✔How much flexion of the Knee is recommended for the lateral projection of the
patella?
5-10 or less
20-30
35-40
45-50 - ✔✔5-10 or less
✔✔You have male patient and need to shield the gonads, where should you place your
lead shield?
ASIS
Ischial spine
inferior margin of symphysis pubis
no shielding is allowed for males - ✔✔Inferior margin of symphysis pubis
✔✔Which joint surfaces of the ankle are open W/ an AP projection of the ankle?
Medial and superior
lateral and medial
superior and lateral
medial, superior, and lateral - ✔✔medial and superior
✔✔A correctly positioned AP 45 degree medial obl ankle projection may also
demonstrate ________?
A base of the 5th fracture
Distal fibula slightly superimposed over the tibia
calcaneous in profile
sustencaculum tail - ✔✔A base of the 5th fracture
