LRA 220 final quiz Exam study guide
COMPLETE EXAM Questions and Answers
(Verified Answers)|| LATEST UPDATE
2026
Where is CR placed for an AP foot and what angle is it at ?
CR is at the base of the 3rd metatarsal
The angle is 10 degrees posteriorly
What CR angulation is required for the AP oblique projection of the foot?
CR is perpendicular to the film
A radiograph of an AP medial oblique projection of the foot, if positioned
correctly 30 -40 degrees, should demonstrate?
Third through fifth metatarsals free of superimposition
Where should the central ray be directed for a lateral calcaneus radiograph?
1 inch (2.5cm) distal to the medial malleolus
How much central ray (CR) angulation (if any) should be used for an AP
projection of the toes?
10° to 15° towards the calcaneus
For a mortise projection of the ankle, the lower limb is rotated
15 to 20 degrees
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?
, Insufficient medial rotation of the foot and ankle
How much CR angulation to the long axis of the foot is required for the
plantodorsal (axial) projection of the calcaneus?
40 degrees and centered at the base of the 3rd metatarsals
A radiograph of an AP ankle projection reveals that the lateral joint space is not
open (lateral malleolus is partially superimposed by the talus). The superior and
medial joint spaces are open. What should the technologist do to correct this
problem and improve the image?
Nothing, this is an acceptable image.
A radiographic appearance of a well-circumscribed lucency within bones
describes:
bone cyst
A radiograph of an AP knee reveals rotation with almost total superimposition of
the fibular head and the proximal tibia. What must the technologist do to correct
this positioning error on the repeated exposure?
Rotate the knee medially slightly
Which projection of the knee will best demonstrate the neck of the fibula without
superimposition?
AP oblique with medial rotation
A lateral knee radiograph that is overrotated toward the image receptor can be
recognized by which of the following?
The fibular head will appear less superimposed by the tibia than a true lateral.
COMPLETE EXAM Questions and Answers
(Verified Answers)|| LATEST UPDATE
2026
Where is CR placed for an AP foot and what angle is it at ?
CR is at the base of the 3rd metatarsal
The angle is 10 degrees posteriorly
What CR angulation is required for the AP oblique projection of the foot?
CR is perpendicular to the film
A radiograph of an AP medial oblique projection of the foot, if positioned
correctly 30 -40 degrees, should demonstrate?
Third through fifth metatarsals free of superimposition
Where should the central ray be directed for a lateral calcaneus radiograph?
1 inch (2.5cm) distal to the medial malleolus
How much central ray (CR) angulation (if any) should be used for an AP
projection of the toes?
10° to 15° towards the calcaneus
For a mortise projection of the ankle, the lower limb is rotated
15 to 20 degrees
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?
, Insufficient medial rotation of the foot and ankle
How much CR angulation to the long axis of the foot is required for the
plantodorsal (axial) projection of the calcaneus?
40 degrees and centered at the base of the 3rd metatarsals
A radiograph of an AP ankle projection reveals that the lateral joint space is not
open (lateral malleolus is partially superimposed by the talus). The superior and
medial joint spaces are open. What should the technologist do to correct this
problem and improve the image?
Nothing, this is an acceptable image.
A radiographic appearance of a well-circumscribed lucency within bones
describes:
bone cyst
A radiograph of an AP knee reveals rotation with almost total superimposition of
the fibular head and the proximal tibia. What must the technologist do to correct
this positioning error on the repeated exposure?
Rotate the knee medially slightly
Which projection of the knee will best demonstrate the neck of the fibula without
superimposition?
AP oblique with medial rotation
A lateral knee radiograph that is overrotated toward the image receptor can be
recognized by which of the following?
The fibular head will appear less superimposed by the tibia than a true lateral.
