Pa water sinuses

With horizontal beam , petreous rides appear just inferior to maxillary

Pa open mouth water of the sinuses demonstrate what 2 things?

sphenoid through maxillary and petrous ridges

All projection of the cranuim have an SID of ?

40 inches

This landmark is perpendicular to the plane of the IR for both PA , and PA axial projection of skull?

OML

For PA and PA axial projection of the skull where does the central ray exit ?

Nasion

what is the angle for PA Axial projection (caldwell method )?

15 degree Caudad

List one evaluation criteria for PA Projection of the skull and 1 on PA Axial Projection of the skull.

a. (Axial) Petrous pyramids in lower third of orbit
b. (PA) Orbits filled by petrous pyramids.

For a Lateral Projection of the Skull, which of the following landmarks is perpendicular to the IR (not perpendicular to the front edge of the IR)?

a. OML
b. IOML
c. IPL
d. AML

For a Lateral Projection of the Skull, which of the following landmarks should be parallel to the long axis of the IR?

a. OML
b. IOML
c. IPL
d. AML

The central ray for a lateral projection of the skull is directed:

a. 2 inches superior to the EAM
b. 1in superior to the EAM
c. 2in anterior to the EAM
d. 1in inferior to the EAM