Positioning skull anatomy/flashcards

What is a typical skull called and what angle do the petrous pyramids project anterior and medially?

Mesocephalic and 47*

What is a broad and short skull called and what angle do the petrous pyramids project anterior and medially?

Brachycephalic and 54*

What is a long and narrow skull called and what angle do the petrous ridges project anteriorly and medially?

Dolichocephalic and 40*

how many cranial and facial bones are there?

8 and 14

List the skull sutures

Squamousal, lambdoidal, coronal, sagittal

What is the junction of the coronal and sagittal suture called?

Bregma

What is the junction of the lambdoidal and sagittal suture called?

Lambda

What are the junctions of the coronal and squamousal sutures?

Right and left pterion

What are the junctions of the lambdoidal and squamousal sutures called?

Right and left asterion

What is the device that holds a skull in place to help with positioning called?

Cephalostat

What is the area just under your nose called?

Acanthion

What is the space between your eyebrows called?

Glabella

What is the positioning landmark directly below the glabella?

Nasion

What is the positoning lanmark that’s in the center of your chin called?

The mental point

What is the angle for AP axial (towne) if you use OML? What about if you use IOML?

30* for oml, 37 for IOML

What orientation should your collimation be for lateral skull?

Crosswise

how far above the EAM should your cr be for lateral?

2 inches

What is only shown in the lateral skull?

All four sinuses

What is shown in profile on a pa skull?

The frontal bone. also the petrous ridges will fill the orbital sockets.

How do you know if your PA axial (caldwell) was positioned correctly? Where should the beam exit?

If the petrous ridges fill the bottom third of the orbital sockets. The glabella

What angle do you use for PA axial (caldwell)? And where should the CR exit?

15* caudad and the nasion

What angle should your OML line be from the IR when doing a waters? And where does the CR exit?

37* and the acanthion

What does PRUMS mean?

The petrous ridges are under the maxillar sinuses in a waters view

What is parallel to the ir and perpendicular to the beam in a Submentovertex view?

The IOML

What is shown in the SMV view?

Maxillary, ethmoid, and sphenoid sinuses