Facial Bones Review

Question 1

Patient position for PA axial (caldwell) of facial bones

Answer 1

• Patient PA upright
• Nose and forehead against IR
• OML aligned perpendicular
• MSP aligned

Question 2

IR for PA axial caldwell:

Answer 2

Medium LWC

Question 3

CR for PA axial caldwell:

Answer 3

15 degrees caudad exiting the Nasion

Question 4

Collimation for PA axial caldwell:

Answer 4

Include lateral margins of skull, half of forehead to upper incisors

Question 5

Image critique for PA axial caldwell:

Answer 5

• equal distance lateral borders both sides
• symmetric petrous pyramids
• petrous pyramids in lower 1/3 of orbits (good OML/CR position)

Question 6

patient position for Parietoacanthial waters of the facial bones:

Answer 6

• PA upright (seated)
• adjsut chin so MML is perpendicular to IR (OML 37)
• MSP aligned straight

Question 7

IR for waters:

Answer 7

Medium LW

Question 8

CR for waters

Answer 8

perpendicular to exit acanthion

Question 9

collimation for waters

Answer 9

lateral skull margins, half of forehead to upper incisors

Question 10

Good OML/MML positioning should show

Answer 10

Petrous ridges right below maxillary sinuses

Question 11

Patient position for Lateral

Answer 11

upright L or R lateral
IPL perpendicular to IR
MSP parallel to IR
IOML perpendicular to long axis of field (chin lifted a bit)

Question 12

Collimation for Lateral

Answer 12

Include about half of frontal bone/frontal sinus to eam, all facial bones must be included (mandible not that important tho)