Sinuses
The SID for all sinus projections
40"
Centering point for TMJ Townes
3" above nasion
Which line is perpendicular to the IR for the Waters view?
Which positioning line is perpendicular to the IR for the Caldwell projection
OML
Anatomic line perpendicular to the IR for the shallow Waters view
LML
Breathing for all sinus projections
Suspend
kVp for all mandible/TMJ projections
80
Centering point for the Caldwell projection
Nasion
CR angulation for Reverse Caldwell method
15 degrees cephalic
Centering point for the lateral projection
Outer canthus
Where does the CR exit for the Waters view?
Acanthion
Anatomic line perpendicular to the IR and Centering point for PA body of mandible
line: AML
Centering: LML
Centering point for the lateral projection
3 structures shown on the lateral projection
- sella turcica
- anterior and posterior clinoid processes
- Dorsum sellae
- superimposed orbital roofs
Collimation for lateral orbits
5" x 5"
CR angle for the Caldwell projection
15 degrees caudad
The degrees of CR angulations for the AP axial TMJ projection. (Must name both angles and lines)
OML: 35 degrees caudad
IOML: 42 degrees caudad
CR angulation for the Reverse Waters projection
Perpendicular
CR angles for Townes view (must name both)
OML: 30 degrees caudad
IOML: 37 degrees caudad
CR angulation for Exaggerated Caldwell projection
30 degrees caudad
3 Structures seen on the Caldwell projection
- Frontal sinus
- Petrous pyramids in lower 1/3 of orbits
- Ethmoid air cells
How is the head positioned for the axiolateral/axiolateral obliques for the mandible?
Ramus:
Body:
Symphysis:
Ramus: true lateral
Body: head rotated 30 degrees towards IR
Symphysis: head rotated 45 degrees towards IR
CR angulation for the Exaggerated Caldwell projection
30 degrees caudad
CR angulation for the Haas method
25 degrees cephalic
Centering point and anatomic line perpendicular to the IR for the Rhese view
Centering: middle of orbits
Line: AML