Cranium

1
Chapter 12

• Cranium
• Part 2

2
Skull Classifications

• __________________
• Average
• __________________
• Long
• __________________
• Short

3
Topographical Landmarks

• ________________
• Between eyebrows
• ________________
• Line connecting outer points of the eyes
• _________________
• Depression at bridge of nose

4
Landmarks

• __________________
• Area of upper lip and nasal septum
• ____________
• Point of lower posterior mandible
• ________________
• Tip of chin

5
Ear Landmarks

• ________________
• Large flap of ear
• _____________
• Small flap anterior to EAM
• ________________
• Top of ear where glasses sit

6
Eye Landmarks

• ______________
• Points of outer and inner eye
• __________________
• Superior ridge of eye
• ___________________
• Inferior ridge of eye

7
Skull Lines

• __________________
• Glabella to EAM
• _______________
• Outer canthus to EAM
• ________________
• Infraorbital margin to EAM

8
Skull Lines

• ___________________
• Acanthion to EAM
• ___________________
• Closed lips to EAM
• ___________________
• Mental point to EAM

9
Watch out in skull imaging

• Watch positioning lines
• ____________
• ____________
• Pt condition
• _______________!!!!!!!!!!!!!!!!!!!!!

10
Imaging the Cranium

• Routine
• PA Caldwell
• AP Towne
• Rt/Lt Lateral
• Submentovertex (SMV)
• 70-80-kVp
• 40SID

11
PA Caldwell

• Pt Prone
• ____________________
• No Rotation or Tilt
• _____________angle
• CR to exit ______________

12
PA Caldwell

• _____________should be in lower _______________
• Lateral _____________equidistance from lateral
  ____________

13
AP Towne

• Pt Supine
• _________________________
• _________angle for OML. _____for IOML
• CR to enter EAM line. ________________

14
AP Towne

• ________________equidistance to lateral skull
  margin.
• ________________in foramen magnum

15
Rt/Lt Lateral

• Pt in ________________with head turned in lateral
• ___________________
• ______________ perpendicular to front edge of
  cassette
• CR directed ______________to EAM

16
Lateral

• Rotation ________________of bilateral
  structures
• EAM
• ________________
• Tilt __________________
• EAM
• __________________
• Sphenoid Lesser Wings

17
Submentovertex (SMV)

• Various ways to get position
• ________________to cassette
• CR ________________midway between ____________
  exits vertex

18
Sella Turcica

• Routine
• AP Towne
• Rt Lateral
• 8 x 10
• 70-80 kVp
• 40SID

19
Sella

• AP Towne
• ____________to IR
• ____________
• CR ____superciliary arch
• Tighter collimation

• Lateral
• Regular lateral position
• CR _________________ to EAM
• Tight collimation