Sinuses

Question 1

All Sinus Images should be done

Answer 1

Upright

Question 2

Lateral (Affected Side)

Answer 2

• IOML perp
• CR centered 1/2’-1” posterior to outer canthus

****Should see all 4 sinuses****

Question 3

Which sinus is of primary intrest on the Lateral projection

Answer 3

Sphenoidal Sinus

Question 4

PA Axial (Caldwell) for sinuses

Answer 4

• OML 15 degrees
• CR is straight

Question 5

Parietoacanthial (Waters)

Answer 5

• OML 37 degrees (MML perp)
• (chin only touching IR)
• CR perp exiting acanthion straight beam

Question 6

SMV Projection

Answer 6

• IOML II, Cranial Vertex resting on IR
• CR perp entering mandibular angles, 3/4” anterior to EAM

Question 7

Which sinus is demonstrated with the open mouth Waters

Answer 7

Sphenoidal & maxillary Sinuses

CR is horizontal exiting the acanthion