Skull, Sinuses, Orbits and Nasal Bones

Question 1

Lateral Skull:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 1

• Center 2” above EAM w/ IPL is perp, MSP is parallel, IOML is parallel with equal light on both sides of the head.
• Place head as if listening to the board
• 40”, 10x12 CW leave collimation open
• 75@8
• Suspend respiration
• Entire cranium w/ superimposed parietal bones

Question 2

PA 0 Degree Skull:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 2

• OML perp, MSP is perp, to exit at the glabella
• Place nose and forehead against IR and align as needed.
• 40”, 10x12 LW, leave collimation open
• 75@20
• Suspend respiration
• entire cranium

Question 3

AP Axial Skull Towne Method:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 3

• Angle 30 degrees caudal 2 and 1/2” above the glabella with OML perp and MSP perp
• Place back of head against IR and align as needed.
• 40”, 10x12 LW, leave collimation open
• 75@32
• Suspend respiration
• entire cranium

Question 4

Lateral Sinus Upright:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 4

• Center midway between outer canthus and EAM w/ IPL perp, MSP parallel, and IOML parallel.
• Place head as if listening to the board.
• 40”, 8x8
• 70@6
• Suspend respiration
• All 4 paranasal sinus groups

Question 5

PA Sinuses Caldwell Projection:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 5

• Center to exit at the nasion w/ OML perp and raised 15 degrees and MSP perp with equal distance above and below the nose.
• Rest patients nose and forehead against the IR and align as needed.
• 40”, 8x8
• 70@25
• Suspend respiration
• Frontal sinuses
• *Collimate and place marker first!

Question 6

Waters Method Sinus/Nasal Bones:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 6

• PA, center to exit at the acanthion w/ MSP perp, and MML perp
• Place nose and chin against board and align as needed.
• 40”, 8x8 w/ marker at bottom
• 75@20
• suspend respiration
• petrous ridges below maxillary sinuses

Question 7

SMV Sinuses:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 7

• Center 2” below mandibular symphysis w/ MSP perp and IOML parallel.
• Place vertex of skull against IR and align as needed.
• 40”, 8x8
• 75@50
• Suspend respiration
• Sphenoid sinuses

Question 8

Lateral Nasal Bones:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 8

• Center 1/2” inferior to nasion w/ IPL perp, MSP parallel and IOML parallel.
• Listening to the board OR can do table top OR cross table lateral.
• 40”, 5x5
• 55@2.5
• Suspend respiration

Question 9

Modified Waters Orbits:
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 9

• Centered to exit at the acanthion w/ LML and MSP perp.
• Rest chin and nose against the IR and align as needed.
• 40”, 8x8
• 75@20
• Suspend respiration

Question 10

Rheese Method Optic Foramina
CR-
Position-
SID- 
Technique-
Instructions-
Anatomy demonstrated-

Answer 10

• Center at the midpoint of the downsides orbit, w/ AML perp, MSP perp and then rotated 37 degrees towards the affected side.
• Chin, cheek and nose are touching the IR towards the affected side.
• 40”, 4x4
• 75@12
• Suspend respiration