Ch 6 Assignment 1

Which metatarsal bone of the foot has a prominent tuberosity frequently

Fractured?

Fifth

Which term describes the top or anterior surface of the foot?

Dorsum

The medial malleolus is part of the

Tibia

To decrease the angle between the anterior surface of the foot and anterior surface of the lower leg is described as

Dorsiflexion

To reduce scatter radiation during tabletop procedures, the Bucky tray should not be positioned directly under the lower limb being radiographed

True

When using computed radiography, lead masking should not be placed on the regions of the imaging plate not within the collimation field.

False

Which of these labeled structures or bones identifies the"cuneiform? (Place a check by the best choice

D

Which projection/position of the foot is represented by the drawing of the foot in Fig. 6-1?

AP oblique, 55° medial rotation

Which one of the labeled structures is the medial condyle?

A

Which of the labeled structures is the adductor tubercle?

C

Which of the labeled structures is the lateral condyle?

B

This radiograph represents which of the following positions?

Lateral knee under-rotated

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

Plantar flexion

How much CR angulation (if any) should be used for an AP projection of the

toes?

10° to 15° toward calcaneus

Which of the following routines should be performed for a study of the second

toe?

AP, AP oblique with medial rotation, lateromedial projection

 A lateral knee radiograph that is over-rotated 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

To properly visualize the joint spaces with the AP projection of the foot, the CR must be

Perpendicular to the metatarsals

What CR angulation is required for the AP oblique projection of the foot

CR is perpendicular to the image receptor

How much CR angulation to the long axis of the foot is required for the

plantodorsal (axial) projection of the calcaneus

40°

How much rotation from an AP of the ankle will typically produce a mortise

view

15° to 20°

Which projection of the ankle best demonstrates the distal tibiofibular joint

AP oblique with 45° rotation

To ensure that both joints are included on an AP projection of the tibia and fibula on an adult, the technologist should

Turn image receptor diagonally

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

3° to 5° caudad

What CR angle should be used for a lateral projection of the knee on a normal size pelvis

No CR angle is required

5° to 7° cephalad

Follow-up radiographs for a fractured tibia and fibula may include only the joint closest to the site of injury

True

How much flexion of the knee is best for the lateral projection of the knee

20° to 30°

A radiograph of an AP oblique projection of the foot, if positioned correctly,

should demonstrate

Third through fifth metatarsals free of superimposition

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 repeat exposure

Rotate the knee medially

A patient has a lower leg fracture reduced and cast in ER. The following factors were used initially: 65 kVp, 10 mAs, 40-in SID, detail screens. A large plaster cast is applied. Which of the following exposure factors should be used on the postreduction study

65 kVp, 20 mAs, 40-in SID, detail-speed screens

A patient comes to the radiology department for a knee study with special interest in the region of the proximal tibiofibular joint and the lateral condyle of the tibia.

Which of the following projections should the technologist obtain

AP, lateral, and medial oblique knee

A patent enters the ER with a possible transverse fracture of the patella. Which of the following routines would safely provide the best images of the knee

AP and horizontal beam lateral, no flexion

A 3° to 5° caudad CR angle should be used for an AP knee projection for patients with thick thighs

False

The correct CR placement for an AP projection of the knee is mid-patella

False

A correctly positioned lateral ankle will demonstrate the lateral malleolus

superimposed over the posterior half of the tibia

True