3. Paranasal Sinuses Each sinus is name after the bone it resides in!

4. Lateral Aspects of Sinuses

11. Sinusitis Video (Click on icon)

16. Frontal Sinuses

20. Sinuses should always be performed upright with horizontal beam

21. Horizontal Beam Beam angles up 45 degrees

22. Beam projected straight downward

23. If patient can not sit or stand upright, what is an alternative method for getting equally useful views? CrossTable Lateral or Dorsal Decubitus

24. To see an anterior posterior projection-- A Lateral Decubitus!-- As long as beam is horizontal , a fluid level can be demonstrated!

27. PA axial (Caldwell method) Incorrect! Beam should not be angled- must be horizontal! X

28. For proper PA axial of sinuses, either tilt IR 15 degrees forward Or keep IR vertical, but extend pt.’s head back 15 degrees

31. Parietoacanthial Projection Waters Method

33. Proper Waters Position OML is 37 degrees to IR (cassette) Not OML 37 deg. to CR !

36. Open-mouthed Waters for Sphenoid Sinus (Board Question)

37. Lateral Projection Shows all 4 sets of sinuses at once!

40. SMV (basal) projection Demonstrates Ethmoid & Sphenoid sinuses best!

42. If patient can’t extend head back enough--

49. Underpenetrated Is there fluid in apices or not?