Procedures Skull Positioning Flashcards
For any headwork you should always
FB and clean IR
Skull Routine
PA
AP TOWNE
Laterals (Rt and Lt)
PA Skull
IR
SID
10x12 LW
40in
PA Skull
CR
Perp to nasion
PA Skull
PP
(3)
Pt seated true AP
OML perpendicular to IR
Head resting on forehead and nose
PA Skull
SS
(4)
Anterior and side walls of cranium
Crista galli
IAC
Lateral borders of orbits
Eval criteria
PA Skull
(3)
Petrous ridges 2/3 - filling orbits
no tilt or rotation
AP orbits will be magnified
Other name for AP Towne
Grashey
AP Towne
IR
SID
10x12 LW
40”
AP Towne
CR
Angle 30 degrees caudal to pass through sella tursica
How to find sella tursica
.75 in up anterior and superior from EAM
AP Towne
PP
(2)
Seated
True AP
OML perp to IR
AP Towne
SS
(4)
Primarily demonstrates occipital bone
Posterior clinoid processes
Dorsum sellae
Coronal and Lambdoidal sutures
Eval Criteria
AP Towne
(3)
Dorsum sellae and posterior clinoids within foramen magnum
No tilt or rotation
Laterals Lt and Rt
IR
SID
10x12 CW
40”
Laterals
PP
(5)
Body is semi-prone head true lateral MSP // IR IPL Perp to IR IOML Perp to front edge of IR
Laterals
SS
(6)
Lateral projection of entire cranium Detail of side adjacent to IR Sella turisca Anterior clinoids Posterior clinoids Dorsum sellae
Laterals
Eval Criteria
Tilt
(5)
Mandibular shadows orbital plates sella tursica anterior clinoid base of skull
Laterals
Eval Criteria
Rotation
(5)
Mandibular shadows squama portion of frontals squama portion of occipital anterior and posterior clinoid processes sella tursica
Non Routine
XTable Lateral Skull
IR
SID
10x12 CW to pt with slip on grid
40”
XTable Lateral Skull
CR
Perpendicular to 2” SUPERIOR to EAM
XTable Lateral Skull
PP
(3)
Supine
No rotation of head
Elevate head on sponge
Xtable Lateral Skull
SS
(2)
Detail of side adjacent to IR
Demonstrates possible A/F level in sphenoid sinus which may indicate basilar skull fracture
Xtable Lateral Skull
Eval criteria
Same as lateral
Sinuses Routine
Caldwell
Open mouth waters
Lateral of affected side
SMV
ALL MUST HAVE EVIDENCE OF COLLIMATION ON ALL FOUR SIDES
Other name for Caldwell
AP Axial
Caldwell
IR
SID
8X10 LW
40”
Caldwell
CR
angle 15° caudal to nasion
Caldwell
PP
(3)
Seated true PA
OML perp to IR
Head resting on forehead and nose
Caldwell
Eval Criteria
Petrous ridges in lower 1/3 of orbits
No tilt or rotation
Open Mouth Waters other name
Paritoacanthial
Open Mouth Waters
IR
SID
8X10 LW
40in
Open Mouth Waters
CR
Perpendicular to open mouth
Open Mouth Waters
PP
(3)
Pt seated true PA
MML Perpendicular to IR
Then have pt open mouth by dropping jaw
Open Mouth Waters
(SS)
(3)
Maxillary sinuses
Sphenoid sinus seen through open mouth
bony nasal septum also demoed
Open Mouth Waters
Eval Criteria
(3)
Petrous ridges just below maxillary sinuses
no tilt or rotation
mouth open
Lateral-Affected side
IR
SID
8X10 LW
40 IN
Lateral-Affected side
CR
Perp to 1/2 way between outer canthus and EAM
Lateral-Affected side
PP
(6)
Semi Prone seated MSP // IR IPL Perp IR IOML Perp front edge of IR Head true lateral
Lateral-Affected side
SS
(2)
Lateral Projection
Sella tursica
Lateral-Affected side
Evaluation Criteria
tilt and rotation: sella tursica
mandible
orbital plates for tilt
SMV
IR
SID
8X10 LW
40in
SMV
CR
Perp to IOML entering midway between goinions to pass through sella tursica
SMV
PP
(3)
Seated start AP
Tip back until vertex is resting on IR
IOML // to IR no tilt or rotation
SMV
SS
(1)
Sphenoid sinus anterior to foramen magnum
SMV
Eval Criteria
Mandible S/I on frontal bone
Mandibular condyles anterior to petrous pyramids
No tilt or roation
