facial bones positioning

Question 1

no rotation/tilt for a lateral facial bone exam will include

Answer 1

Superimposed mandibular rami
Superimposed orbital roofs
Sella turcica in profile

Question 2

no rotation/tilt for a waters (facial bones) exam will include

Answer 2

Distances between lateral borders of the skull and orbits equal
MSP aligned with long axis of collimated field

Question 3

in a waters view, the petrous ridges should be ________________

Answer 3

below maxillary sinuses

Question 4

in a waters, not enough extension = _______________
Too much extension = _________________

Answer 4

petrous ridges superimposed in maxillary sinus, molars in maxillary sinus

Question 5

which is better for showing the orbits/blowout fractures of the orbits: regular waters or modified waters?

Answer 5

modified waters

Question 6

no rotation/tilt in a PA (Axial) Caldwell facial bones will include

Answer 6

Distance from lateral borders of skull to lateral borders of orbits equal
MSP aligned with long axis

Question 7

Dorsal Decub Position
Only position for sphenoid _____________ which is indicative of ______________

Answer 7

sinus effusion, basal skull fracture

Question 8

Trauma AP positioning

Answer 8

CR parallel to OML, centered to glabella

Question 9

Trauma AP Axial positioning

Answer 9

also called a reverse Caldwell, CR 15° cephalad to OML, centered to nasion

Question 10

Trauma Reverse Waters positioning

Answer 10

CR cephalad parallel to MML, centered to acanthion

Question 11

Trauma Modified Reverse Waters positioning

Answer 11

CR cephalad parallel to LML, centered to acanthion

Question 12

for a rhese method x-ray, optic foramen should be in the _____________

Answer 12

lower outer quadrant

Question 13

for mandible, how do we best demonstrate ramus?

Answer 13

head in true lateral

Question 14

for mandible, how do we best demonstrate a general survey?

Answer 14

10-15 degrees towards IR

Question 15

for mandible, how do we best demonstrate the body?

Answer 15

30 degrees towards IR

Question 16

for mandible, how do we best demonstrate the mentum?

Answer 16

45 degrees towards IR

Question 17

what are the three methods for CR angulation in mandible x-rays (axiolateral)?

Answer 17

1. angle CR 25 degrees cephalic
2. combination of head tilt and CR angle
3. tilt head 25 degrees towards IR