PA axial skull

Question 1

What is the method name for this image?

Answer 1

Caldwell method

Question 2

What line should be positioned perpendicular to the IR?

Answer 2

OML

Question 3

How is the MSP in relationship to the IR?

Answer 3

perpendicular

Question 4

What is the central ray angle/direction?

Answer 4

15 degrees caudad

Question 5

What is the central ray location?

Answer 5

Exiting naseon

Question 6

How should the petrous ridges be demonstrated?

Answer 6

In lower 1/3 of orbits

Question 7

If the petrous ridges are demonstrated filling the orbits, what error occurred (if there is an error)?

Answer 7

OML not perpendicular, or not enough angle

Question 8

If the petrous ridges are demonstrated below the inferior orbital margin, what error occurred (if there is an error)?

Answer 8

Chin not tucked enough

Question 9

If the patient’s neck cannot be flexed as required, what line may be used? How would you adjust the CR angle?

Answer 9

IOML, increase angulation by 7 degrees