RAD 245- C-Spine AP Axial Projection- Chapter 8- Module 3

Question 1

What is the positioning error when the vertebral bodies move TOWARD the side positioned CLOSER to the IR, and the spinous processes move TOWARD the side positioned FARTHER from the IR?

Answer 1

When the patient and the cervical vertebrae are rotated away from the AP Axial projection

Question 2

What is the positioning error when the upper cervical vertebrae demonstrate rotation as C1 rotates on C2, and the lower cervical vertebrae remain in the AP projection?

Answer 2

The head is rotated but the thorax remains in the AP projection

Question 3

What is the positioning error when the lower cervical vertebrae demonstrate rotation and the upper cervical vertebrae remain in an AP projection?

Answer 3

The thorax is rotated but the head remains in a forward position

Question 4

Where is the CR angled for a Erect patient on the AP Axial C-Spine?

Answer 4

20 degrees cephalad

Question 5

Where is the CR angled for an Supine patient on the AP Axial C-Spine?

Answer 5

15 degrees Cephalad

Question 6

Where is the CR centered for an AP Axial C-spine?

Answer 6

MSP at the level halfway between the EAM and the jugular notch

Question 7

For the AP axial C-spine projection, When you have a kyphotic patient- How should the angulation be?

Answer 7

More CR angulation (Cephalically)

Question 8

What is the positioning error when the projection demonstrated CLOSED intervertebral disk spaces, and each vertebra’s spinous process is demonstrated WITHIN its vertebral body?

Answer 8

If NO cephalic angle was used OR

CR angulation (Cephalic) was Insufficient

OR if the patient’s head and upper cervical vertebrae are TILTED (Anteriorly) toward the x-ray tube

Question 9

What is the positioning error when the projection demonstrated CLOSED intervertebral disk spaces, with each vertebra’s spinous process demonstrated WITHIN the inferior adjoining vertebral body, and elongated uncinate processes?

Answer 9

CR was angled MORE than needed to align the CR parallel with the Intervertebral disk spaces

OR

If the patient’s cervical vertebral column was extended POSTERIORLY for the examination as with a kyphotic patient

Question 10

What is the positioning error when the upper cervical vertebrae are superimposed over the occiput?

C3 is of interest here

Answer 10

The mandibular mentum is positioned SUPERIOR to the occipital base

Head TILTED TOO Far Backward

Question 11

What is the positioning error when the manidbular mentum is superimposed over the superior cervical vertebrae?

C3 is of interest here

Hope this is right….. Book sucks

Answer 11

The mandibular mentum is positioned inferior to the occiptal base

Chin TUCKED TOO FAR DOWNWARD