Headwork

Question 1

Petrous ridge location for Caldwell (skull, facial bones, sinus)

Answer 1

lower 1/3 of orbit

Question 2

Petrous ridges fill the orbit on:

Answer 2

PA skull

Question 3

Petrous ridges inferior to maxillary sinuses on:

Answer 3

Waters (facial bones and sinuses)

Question 4

Petrous ridges in lower half of maxillary sinuses on:

Answer 4

Modified Waters (facial bones)

Question 5

___ perp to IR for Towne

Answer 5

OML

Question 6

CR for Towne (OML perp)

Answer 6

30 caudal; 2.5 inches (6.5 cm) above glabella

Question 7

CR for Towne (IOML perp)

Answer 7

37 caudal; 2.5 inches (6.5 cm) above glabella

Question 8

Towne CR passes through the:

Answer 8

Foramen magnum

Question 9

___ perp to IR for PA caldwell

Answer 9

OML

Question 9

PA caldwell CR

Answer 9

15 degrees caudal exiting nasion

Question 10

Lateral skull CR

Answer 10

2” above EAM

Question 10

Reverse Towne (Haas) CR

Answer 10

25 degrees Cephalad to OML; 4cm inferior to inion and exits 4cm superior to nasion

Question 11

Prominent point of external occipital protuberance

Answer 11

Inion

Question 12

Lower posterior angle on each side of the mandible

Answer 12

Gonion

Question 13

Magnification of orbits may be used to differentiate:

Answer 13

AP vs. PA skull

Question 14

Trauma AP skull CR

Answer 14

Parallel to OML entering glabella

Question 15

___ parallel to IR for SMV

Answer 15

IOML

Question 16

CR for skull SMV

Answer 16

1.5” (4cm) inferior to mandibular symphysis

Question 17

___ perpendicular to IR for waters

Answer 17

MML

Question 17

OML creates ___ degree angle to IR on Waters

Answer 17

37

Question 18

Modified Waters: ___ perp to IR

Answer 18

LML

Question 19

OML ____ degrees to IR on modified Waters

Answer 19

55

Question 20

Ideal projection to demonstrate possible orbital fractures (blow out) and foreign bodies in the eye

Answer 20

modified waters

Question 21

Effusion in sphenoid sinus may indicate:

Answer 21

basal skull fracture

Question 22

routine views for sinuses

Answer 22

Lateral, Caldwell, waters, SMV

Question 23

Waters view demonstrates ___ sinuses

Answer 23

maxillary

Question 24

OML __ degrees from horizontal on Caldwell sinuses

Answer 24

15

Question 25

Sinuses demonstrated on Caldwell

Answer 25

frontal and ethmoid

Question 26

Sinuses demonstrated on SMV

Answer 26

Ethmoid and sphenoid

Question 27

Sinuses demonstrated on lateral

Answer 27

All 4 (sphenoid is major focus)

Question 28

Only sinus present at birth

Answer 28

Maxillary

Question 29

All sinuses fully developed by:

Answer 29

17-18

Question 30

Sinuses present by age 6-7

Answer 30

frontals/sphenoid

Question 31

OML perp to IR, CR exits at lips

Answer 31

PA mandible

Question 32

CR 35 caudad to OML (42 to IOML) centered to glabella

Answer 32

AP axial mandible (modified towne)

Question 33

AP axial mandible (modified towne) demonstrates

Answer 33

Condyles

Question 34

Head in true lateral demonstrates ___ of mandible

Answer 34

ramus

Question 35

Obliquity of mandible for general survey

Answer 35

10-15 degrees

Question 36

Obliquity of mandible for body

Answer 36

30 degrees toward IR

Question 37

Obliquity of mandible for mentum

Answer 37

45 degrees

Question 38

Tube angle for oblique mandible

Answer 38

25 degrees cephalad

Question 39

PA axial mandible demonstrates:

Answer 39

Condyles (heads) and neck

Question 40

CR for PA axial mandible

Answer 40

20-25 degrees cephalad to exit at the acanthion

Question 41

Axiolateral modified Law obliquity (TMJs)

Answer 41

15 degrees toward IR

Question 42

AP axial modified Towne CR (TMJs)

Answer 42

35 degrees caudad to OML

Question 43

Level of TMJ

Answer 43

2" (5cm) anterior to EAM

Question 44

CR for TMJ modified Law

Answer 44

15 degrees caudad; 1.5" (4cm) superior to upside EAM

Question 46

Patient in true lateral; 25-30 degrees caudal; 1/2 inch (1.3cm) anterior and 2" (5cm) superior to upside EAM

Answer 46

Axiolateral TMJ Schuller method

Question 47

CR for lateral nasal bones

Answer 47

1/2 inch (1.25 cm) inferior to nasion

Question 48

Nasal bones routine exams

Answer 48

Waters, lateral, caldwell

Question 49

CR angle for orbits exaggerated caldwell

Answer 49

30 degrees exiting 3/4" distal to nasion

Question 50

Petrous ridge location in exaggerated caldwell

Answer 50

below orbits