LRA FINAL EXAM QUESTIONS AND ANSWERS
Where should the central ray be directed for a lateral calcaneus radiograph? - (ANSWER)1 inch inferior
to medial malleolus
Which projection is preferable for examining the fibular head of a fractured lower limb? -
(ANSWER)Medial oblique knee
What CR angulation is required for the AP oblique projection of the foot? - (ANSWER)CR is perpendicular
to the film
A radiographic appearance of a well-circumscribed lucency within bones describes: - (ANSWER)bone
cyst
The best method of evaluating injuries to the menisci and ligaments of the knee joint involves: -
(ANSWER)MRI
Which projection and/or position of the foot is represented by this drawing of the foot? -
(ANSWER)Right AP projection no rotation
Which of the labeled structures is the lateral condyle of the femur? - (ANSWER)B
When multiple exposures are placed on a single computed radiography image receptor (IR), lead
masking should not be placed on the unexposed regions of the imaging plate. True or False -
(ANSWER)False
This radiograph represents which of the following positions? - (ANSWER)Medial lateral of the knee
toward the IR
To decrease the angle between the anterior surface of the foot and anterior surface of the lower leg is
described as: - (ANSWER)Dorsiflexion
How much central ray (CR) angulation (if any) should be used for an AP projection of the toes? -
(ANSWER)10-15 degree toward calcaneus
, LRA FINAL EXAM QUESTIONS AND ANSWERS
Which of the following routines should be performed for a study of the second toe? - (ANSWER)AP, AP
oblique with medial rotation, lateromedial projection
How much is the foot dorsiflexed with the tangential projection for the sesamoid bones if the CR
remains perpendicular to the image receptor? - (ANSWER)15 to 20 from vertical
A lateral knee radiograph that is overrotated toward the image receptor can be recognized by which of
the following? - (ANSWER)The fibular head will appear less superimposed by the tibia than a true lateral.
A correctly positioned AP 45° medial oblique ankle projection frequently may also demonstrate a
fracture of the base of the fifth metatarsal if present. True or False - (ANSWER)True
To properly visualize the joint spaces with the AP projection of the foot, the CR must be: -
(ANSWER)Perpendicular to the metatarsals.
Which joint space should be open or almost open for a well-positioned AP oblique knee projection with
medial rotation? - (ANSWER)proximal tibiofibular
Which position of the foot will best demonstrate the lateral (third) cuneiform? - (ANSWER)AP oblique
with medial rotation
What is one advantage of the lateromedial projection of the foot? - (ANSWER)The foot assumes a more
true lateral position
How much CR angulation to the long axis of the foot is required for the plantodorsal (axial) projection of
the calcaneus? - (ANSWER)40 degree cephalad
Where is the CR placed for a mediolateral projection of the calcaneus? - (ANSWER)1 1/2 in distal to the
medial malleolus
Which joint surfaces of the ankle joint are open with an AP projection of the ankle? - (ANSWER)Medial
and superior
Where should the central ray be directed for a lateral calcaneus radiograph? - (ANSWER)1 inch inferior
to medial malleolus
Which projection is preferable for examining the fibular head of a fractured lower limb? -
(ANSWER)Medial oblique knee
What CR angulation is required for the AP oblique projection of the foot? - (ANSWER)CR is perpendicular
to the film
A radiographic appearance of a well-circumscribed lucency within bones describes: - (ANSWER)bone
cyst
The best method of evaluating injuries to the menisci and ligaments of the knee joint involves: -
(ANSWER)MRI
Which projection and/or position of the foot is represented by this drawing of the foot? -
(ANSWER)Right AP projection no rotation
Which of the labeled structures is the lateral condyle of the femur? - (ANSWER)B
When multiple exposures are placed on a single computed radiography image receptor (IR), lead
masking should not be placed on the unexposed regions of the imaging plate. True or False -
(ANSWER)False
This radiograph represents which of the following positions? - (ANSWER)Medial lateral of the knee
toward the IR
To decrease the angle between the anterior surface of the foot and anterior surface of the lower leg is
described as: - (ANSWER)Dorsiflexion
How much central ray (CR) angulation (if any) should be used for an AP projection of the toes? -
(ANSWER)10-15 degree toward calcaneus
, LRA FINAL EXAM QUESTIONS AND ANSWERS
Which of the following routines should be performed for a study of the second toe? - (ANSWER)AP, AP
oblique with medial rotation, lateromedial projection
How much is the foot dorsiflexed with the tangential projection for the sesamoid bones if the CR
remains perpendicular to the image receptor? - (ANSWER)15 to 20 from vertical
A lateral knee radiograph that is overrotated toward the image receptor can be recognized by which of
the following? - (ANSWER)The fibular head will appear less superimposed by the tibia than a true lateral.
A correctly positioned AP 45° medial oblique ankle projection frequently may also demonstrate a
fracture of the base of the fifth metatarsal if present. True or False - (ANSWER)True
To properly visualize the joint spaces with the AP projection of the foot, the CR must be: -
(ANSWER)Perpendicular to the metatarsals.
Which joint space should be open or almost open for a well-positioned AP oblique knee projection with
medial rotation? - (ANSWER)proximal tibiofibular
Which position of the foot will best demonstrate the lateral (third) cuneiform? - (ANSWER)AP oblique
with medial rotation
What is one advantage of the lateromedial projection of the foot? - (ANSWER)The foot assumes a more
true lateral position
How much CR angulation to the long axis of the foot is required for the plantodorsal (axial) projection of
the calcaneus? - (ANSWER)40 degree cephalad
Where is the CR placed for a mediolateral projection of the calcaneus? - (ANSWER)1 1/2 in distal to the
medial malleolus
Which joint surfaces of the ankle joint are open with an AP projection of the ankle? - (ANSWER)Medial
and superior
