Exam 6: Lower Limb

What CR angulation is required for an AP projection of the knee on a patient with an ASIS-to-tabletop measurement of 18 cm?

How much CR angulation to the long axis of the foot is required for the plantodorsal (axial)projection of the calcaneus?

Which of these labeled structures or bones identifies the metatarsophalangeal joint?

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.

Which of the following imaging modalities and/or procedures will provide the best assessment for osteomyelitis of the foot?

A radiograph of an AP medial oblique projection of the foot,if positioned correctly,should demonstrate:

Saclike structures found in the knee joint that allow smooth articulation between ligaments and tendons are called:

A 3° to 5° caudad CR angle should be used for an AP knee projection for patients with an ASIS-to-tabletop measurement of 20 cm.

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?

The tangential projection for the sesamoid bones of the foot should be performed with the patient prone rather than supine to minimize image magnification,if the patient condition allows it.

The AP mortise projection of the ankle is commonly taken in surgery during open reductions.

A radiograph of a PA axial projection for the intercondylar fossa does not demonstrate the fossa well.It is foreshortened.The following positioning factors were used: patient prone,knee flexed 40° to 45°,CR angled to be perpendicular to the femur,40-inch SID,and no rotation of the lower limb.On the basis of the factors used,what changes need to be made to produce a more diagnostic image?

The adductor tubercle is present on the medial,posterior aspect of the femoral condyle and can be used to determine possible rotation of a lateral knee projection.

MATCHING Match the correct disease or condition with the corresponding pathologic description.(Use each choice only once.) -Benign,neoplastic bone lesion due to overproduction of bone at a joint (usually the knee)

MATCHING Match the correct disease or condition with the corresponding pathologic description.(Use each choice only once.) -Also known as osteitis deformans,a bone disease that disrupts new bone growth,resulting in overproduction of very dense yet soft bone

Extending the ankle joint or pointing the foot and toes downward is called:

A patient enters the emergency department (ED)with a possible transverse fracture of the patella.Which of the following routines would safely provide the best images of the patella?

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

Where would the interphalangeal joint be found in the foot?

Where is the CR placed for a mediolateral projection of the calcaneus?