wk4 (Skull radiography)

Question 1

Skull OF 0

SID? 
kVp?
AEC?
Focal?
CR?
Positioning?

Answer 1

SID: 100-115cm
kVp: 65-80 kVp
Centre AEC
small focal

Patient to have forehead resting on IR

CR ⊥ IR @ nasion

Question 2

Skull OF 20

SID? 
kVp?
AEC?
Focal?
CR?
Positioning?

Answer 2

SID: 100-115cm
kVp: 65-80 kVp
Centre AEC
small focal

CR ⊥ IR @ nasion

• Patient tilt head up (OML forming 20 degree to bucky)
• Patient to have nose touching the IR

Question 3

Lateral Skull

SID? 
kVp?
AEC?
Focal?
CR?
Positioning?

Answer 3

SID: 100-115cm
kVp: 65-80 kVp
Centre AEC
small focal

Ensure no tilt no rotation

Patient interpupillary line ⊥ to IR
Patient MSP // to IR

CR ⊥ IR @ 5cm superior to EAM

Question 4

Skull Townes View

SID? 
kVp?
AEC?
Focal?
CR?
Positioning?

Answer 4

SID: 100-115cm
kVp: 65-80 kVp
Centre AEC
small focal

Patient to chin down such that OML Perpendicular to IR

CR angled 30-37 degrees caudally @ approx 6.3cm above gabella passing thru EAM

Question 5

Projections for Skull?

Answer 5

1. OF 0
2. OF 20
3. Lateral
4. Townes view

Question 6

Collimation for OF0 & OF20

Answer 6

Superior: Vertex

inferior: lower lips
lateral: Lateral skin margins

Question 7

Collimation for Skull Townes View

Answer 7

superior: vertex
interior: Acanthion
Lateral: Lateral skin margins

Question 8

Collimation for Skull Lateral

Answer 8

Superior: vertex of skull

inferior: lower lip
anterior: nose
posterior: occiput