Skull Part 1 Flashcards
For lateral skull what line do we use
IOML AND IT MUST BE parallel IPL is perp
For lateral skull the IPL IS
parallel
CR for lateral skull
2 in superior to EAM
What do you see in lateral skull
Sella turcia in profile, dorsum sellae, anterior and posterior clinoid process
For pa and pa axial what line do we use
OML AND IT MUST BE PERP
Angle for Caldwell
15 degree caudal
CR for PA PA AXIAL
Exiting the nation
How do we know oml is good for regular pa
Petrous ridges fill all of orbits evenly
How do we know oml is good for pa axial
Petrous ridges fill lower third of orbits
Why do you do pa axial haas or ap Townes
To see sellar structures within foramen magnum
Angle for Townes
30 oml 37 ioml caudal
CR for haas
Enters 1.5in below occipital protuberance and 1.5 above nasion
Your line for haas
Oml perp to IR
How do you know if no rotation for haas
Dorsum sellar and posterior clinoid process in foramen magnum
Central ray for ap and ap axial
Nasion
Angle for ap axial
15 cephalon
What line do you use for ap and ap axial
Oml and it’s perp
What line do we use for Townes
Oml and ioml
Angle for Townes
30 caudal if oml and 37 caudal if ioml
Central Ray for Townes
2.5 in above glabella exiting at the foramen magnum
No rotation Townes evidenced by
Sellar structures in the foramen magnum like dorsum sellar and clinoid process
What line are we using for SMV
IOML and it’s parallel
What is the central ray for SMV
Centered to sella turcica 3/4in anterior to eam
