Skull Projections

Question 1

PA PROJECTION
• Rest pxn’s___ and ____
against the Bucky surface
• ___ perpendicularto IR
•Align MSP perpendicular to
__ of table
•CR is perpendicular to __ and
centered to and exits at

Answer 1

nose forehead
OML
Midline
IR
Glabella

Question 2

• S/S: of PA ( 5)
:F, C,FAES, G& LS, P

Answer 2

Frontal bone,
crista galli, frontal
and anterior
ethmoidalsinuses,
greater and lesser
wing of sphenoid,
Petrous Ridgesfill
the orbits

Question 3

PA Axial Projection/ Caldwell Method
• Rest pxn’s nose and forehead against the Bucky
surface
• OML must be perpendicular to IR
• CR: ___ to exit at

Answer 3

15° caudad,
Nasion

Question 4

Caldwell method SS: P.F.O.A&EAC

Answer 4

P.R projectednlower 1/3 of orbit
Frontal bone
Orbital rim
Anterior & ethmoidal air cells

Question 5

Lateral Projection

__&__ parallel to IR

Answer 5

MSP & IOML

Question 6

Lateral Projection
____ perpendicular

Answer 6

IPL

Question 7

CR. OF LATERAL

Answer 7

Perpendicular to IR
RP IS 2 INCHES SUPERIOR EAM

Question 8

Ss of skull Lateral

Answer 8

Superimposed cranial halves
Sella turcica & clivus

Question 9

For trauma px position
Demonstrate air fluid lvls

Answer 9

Cross table lateral

Question 10

_____ to IR, DIRECTED TO __INCH &__ inch superior to EAM : TO DEMONSTRATE SELLA TURCICA

Answer 10

Perpendicular
3/4 inch anterior& superior

Question 11

AP AXIAL - TOWNE METHOD
Depress px ___
___ is perpendicular to IR

Answer 11

Chin
OML

Question 12

AP AXIAL- TOWN
CR & RP

Answer 12

30 deg caudad to OML
37 deg caudad to IOML
Rp: 2.5 inches above glabella

Question 13

SS OF TOWN AP AXIAL
: PPOFD

Answer 13

S/S: Occipital bone, petrous
pyramids, and foramen
magnum, with the dorsum
sellae and posterior clinoids
visualized in the shadow of
the foramen magnum.

Question 14

PA Axial Projection/ Haas Method
__ rest on forehead and nose
CR: ____, it enters ___ below the Inion and exits at 1
½ inch above the Nasion

Answer 14

Head
25° Cephalad
1½ inch

Question 15

SubmentoVertico Projection/ Full Basal Projection
____ Method
• Hyperextend the neck and
raise the chin as possible
until IOML is parallel to IR.
Rest the pxn’s head on
vertex.
• CR is perpendicular to ___
• R.P:__ inch anteriorto level
of EAM ( midway between
angles of mandible)

Answer 15

Schuller
IOML
¾

Question 16

PA AXIAL HAAS SS

Answer 16

Sellar Structures within foramen magnum

Question 17

S/S: Base of the skull,
foramen magnum, ovale
and spinosum, mandible,
hard palate, zygomatic
arches, petrous ridges,
ethmoid and sphenoid
sinuses, and the occipital
bone

Answer 17

SMV/VSM

Question 18

S/S: Occipital bone, petrous
pyramids, and foramen
magnum, with the dorsum
sellae and posterior clinoids
visualized in the shadow of
the foramen magnum.

Answer 18

Ap axial: towne method