Procedures Flashcards
Thyroid cartilage
C4-5
Sternal angle
T4-5
Inferior angle of the scapula
T7
Xiphoid process
T10
Umbilicus
L3-4
Iliac crest
L4-5
Greater trochanter
Level of symphysis pubis
Mesocephalic
Petrase pyramids project anteriorly and medially at an angle of 47° from the MSP
Brachycephalic
-short from front to back broad from side to side and shallow from vertex to base
-Petras pyramids lie at an average angle of 54°
Dolichocephalic
-Long from front to back narrow from side to side and deep from vertex to base
-Petras pyramids form a narrow angle an average of 40°
Lateral skull
-IPL perpendicular to IR
-CR 2 inches superior to EAM
PA skull
-CR exiting nasion
-symmetry of skull and petrous ridges of the temporal bone fill the orbits
AP axial (Towne)
-CR angled 30 caudad through foramen magnum to the OML or 37 to IOML and MSP 2 to 3 inches superior to superciliary ridge
-symmetry of skull and dorsum sellae projected within foramen magnum
-visualize occipital bone
PA axial (Caldwell)
-OML perpendicular to IR
-CR 15 caudad to MSP exiting nasion
-symmetry of skull and petrous ridges projected in lower third of orbits
-frontal sinuses visualized and anterior ethmoid sinuses
Submentovertex (SMV) full basal
-neck hyperextended until IOML parallel to IR
-CR perpendicular to MSP through sella turcica
-symmetry of mandibular rami of cranium
Lateral facial bone
-CR perpendicular to zygoma (midway between EAM and outer canthus
-IOML
Parietoacanthial projection (Waters)
-MSP and MML positioned perpendicular to IR neck hyperextended so the OML forms a 37 angle with IR
-CR perpendicular to IR MSP exiting acanthion
-petrous ridges inferior to maxillary sinuses
PA modified parietoacanthial (modified waters)
-neck hyperextended, OML placed 55 angles to IR
-MSP exiting acanthion
-shows orbits and possible blow out fracture (inferior rectus muscle)
-petrous ridges in middle of maxillary sinuses
-when doing it with open mouth, you see sphenoid sinuses
Nasal bone parietoacanthial waters
-MSP and MML positioned perpendicular to IR neck hyperextended so the OML forms a 37 angle with IR
-demonstrate bony nasal septum
Lateral nasal bone
-IPL perpendicular to IR
-CR 2 cm (3/4 inch) below nasion
-shows nasal bone closest to IR and anterior nasal spine
Lateral horizontal beam sinuses
-CR 1 inch posterior to outer canthus
-demonstrates all four sinus groups
Paranasal sinuses parietoacanthial waters view
-MML positioned perpendicular to IR neck hyperextended so the OML forms a 37 angle with IR
-shows maxillary sinuses free of superimposition
-can also demonstrate sphenoid sinus through open mouth
Submentovertex full basal horizonal beam
–neck hyperextended until IOML parallel to IR
-CR perpendicular to MSP through sella turcica 3/4 inch anterior to level of EAM
-demonstrate ethmoid (anterior) and sphenoid (posterior) sinuses
PA axial caldwell paranasal sinuses
-demonstrate the frontal and ethmoid sinuses