Items 7 to 12 pertain to the AP axial and PA axial projections.

AP axial, with the patient supine: I5 to 30 degrees cephalad, PA axial, with the patient prone: I5 to 30 degrees caudad

At how many degrees and in which direction should the central ray be directed for the following projections?

The clavicle is more horizontal and projected free of bony superimpositio n the axial projections

How does the appearance of the clavicle differ in the axial projections compared with the AP/PA
projections?

The size of the patient (thickness of the thorax)

What positioning consideration determines how much the x-ray tube should be angled for AP axial and PA axial projections?

0 to 15 degrees cephalad

How many degrees and in which direction should the central ray be directed for the AP axial projection with the patient upright in the lordotic position?

The CR angle is sufficient if the medial end of the clavicle is at the level of the first or second ribs.

What criterion is used to determine if the CR angle was sufficient for the axial projections of the clavicle?

False (E)

True or false. For the AP axial projection, the exposure should occur after the patient has been instructed to suspend respiration following full expiration.