Procedures Skull Positioning Review

Question 1

Skull Routine

Answer 1

PA Skull
AP Towne
RT/LT Laterals

Question 2

Sinuses Routine

Answer 2

Caldwell
Open Mouth Waters
Lateral of affected side
Submentalvertical

Question 3

PA Skull

CR

Answer 3

⊥ nasion

Question 4

AP Towne

CR

Answer 4

<30° Caudal to pass through sella tursica

Question 5

AP Towne

CR on not flexible pt

Answer 5

<37° Caudal to pass through sella tursica

Question 6

Lateral Skull

CR

Answer 6

⊥ 2” Above EAM

Question 7

XTable Lateral Skull

CR

Answer 7

⊥ 2” Superior to EAM

Question 8

Caldwell Sinus

CR

Answer 8

<15° Caudal to nasion

Question 9

Open Mouth Waters Sinus

Answer 9

⊥ open mouth

Question 10

Lateral of affected side

Answer 10

⊥ to 1/2 way between outer canthus and EAM

Question 11

SMV Sinus

Answer 11

⊥ to IOML entering midway between gonions to pass through sella tursica

Question 12

PA Skull

SS

Answer 12

Frontal bone

Question 13

AP Towne
SS
4

Answer 13

Occipital bone

Question 14

Laterals Skull
SS
6

Answer 14

(Side closest to IR)

Parietal and temporal

Question 15

Xtalbe Lateral
SS
2

Answer 15

Detail of side closest to IR

Demonstrates possible A/F levels in sphenoid sinus which may indicate basilar skull fx

Question 16

Caldwell
SS
1

Answer 16

Best demonstrates frontal and ethmoid sinuses

Question 17

Open Mouth Waters Sinuses
SS
2

Answer 17

Maxillary sinuses
Sphenoid sinuses
Seen through open mouth

Question 18

Lateral affected side Sinuses
SS
2

Answer 18

Lateral projection of all 4 sides

Sella tursica

Question 19

SMV Sinuses
SS
1

Answer 19

Sphenoid sinus anterior to foramen magnum

Question 20

PA Skull
Eval Criteria
3

Answer 20

Petrous ridges 2/3 to filling orbits
AP, Orbits will be magnified
No tilt or rotation

Question 21

AP Towne
Eval Criteria
2

Answer 21

Dorsum sellae and posterior clinoids within foramen magnum

No tilt or rotation

Question 21

Caldwell Sinuses
Eval Criteria
2

Answer 21

No tilt or rotation

Petrous ridges in lower 1/3 of orbits

Question 22

Open Mouth Waters
Eval Criteria
3

Answer 22

Mouth open
No tilt or rotation
Petrous ridges just below maxillary sinuses

Question 23

Lateral Sinuses
Eval Criteria
3

Answer 23

Sella tursica
Mandible
Frontal bone

Question 24

SMV
Eval Criteria
2

Answer 24

Mandilbe S/I on frontal bone

No tilt or rotation

Question 25

3 structures used to identify tilt rotation

Answer 25

Sella tursica
Anterior clinoid process
Mandibular shadows

Question 26

PA Skull

Baseline

Answer 26

OML ⊥ IR

Question 27

AP Towne

Baseline

Answer 27

OML ⊥ IR

Question 28

Lateral Skull
Baseline
3

Answer 28

IPL ⊥ IR

IOML ⊥ to front edge of IR

Question 29

Open Mouth Waters Sinus

Baseline

Answer 29

MML ⊥ IR

Question 30

Caldwell Sinus

Baseline

Answer 30

OML ⊥ IR

Question 31

Lateral Sinuses

Baseline

Answer 31

MSP // IR
IPL ⊥ IR
IOML ⊥ Front edge of IR

Question 32

SMV Sinuses

Baseline

Answer 32

IOML // to IR

Question 33

Alternate name for Waters projection

Answer 33

parietoacanthial

Question 34

Alternate name for AP Towne projection

Answer 34

Grashey

Question 35

MSP

Answer 35

Separates the skull into right and left halves

Question 36

Coronal

Answer 36

Separates skull into anterior and posterior portions

Question 37

Transverse

Answer 37

Separates the skull into inferior and superior portions

Question 38

Tilt

Answer 38

Lateral bending at neck with vertex lt or rt

Question 39

PA Skull

PP

Answer 39

OML ⊥ IR

Patient seated true PA

Question 40

Lateral Skull
PP
5

Answer 40

Head true lateral
IOML ⊥ Edge of IR
Body semi prone
MSP // IR
IPL ⊥ IR

Question 41

Open Mouth Waters Sinuses
PP
3

Answer 41

Pt upright true PA

MML ⊥ to IR then have pt drop jaw

Question 42

AP Towne
PP
2

Answer 42

Pt seated True AP

OML ⊥ IR