This document discusses the radiological anatomy of the paranasal sinuses and provides guidance on using CT scans to evaluate the anatomy. It outlines key anatomical structures visible on coronal and axial CT scans such as the frontal sinus, uncinate process, ethmoid bulla, sphenoid sinus, and their common variations. It also discusses technology advances in CT scanning and basic concepts for evaluating and positioning patients for sinus CT scans.

1. Radiological Anatomy - PNS Dr. Asst. Prof Medical College

3. Emil Zuckerkandl

4. Endoscopes & Imaging

5. WHERE ARE WE NOW…?

7. Changing Trends… The Gold Standard- CT Scan CT Scan MRI

15. CT Patient Positioning

22. Optic foramen SOF

23. BASAL LAMELLA

24. Pterygoid plates ppf Pt max fissure

25. Fossa of Rosenmuller

26. Frontal Sinus

27. Extensive Pneumatisation

28. Frontal Recess

29. Uncinate Process

30. Terminal Recess

31. Frontal Cell I IV III II

32. Kero’s Classification I III II

33. Agger Nasi

34. Pneumatisation of crista galli

35. Pneumatisation of Uncinate Process

36. Ostiomeatal Complex ( OMC)

37. B/L CB, Lateralised UP, Narrow Infundibulum

38. Elongated UP

39. Uncinate Process

40. Haller Cell

41. Ethmoid Infundibulum

42. Ethmoid Infundibulum

43. Large bulla & concha bullosa narrowing infundibulum

44. Infundibulum Variants

45. Middle Turbinate

46. Middle Turbinate Part 1

47. Middle Turbinate Part 2

48. Middle Turbinate Part 3

49. Middle turbinate variants paradoxical interlamellar

50. Cocha Bullosa

51. Bulla Ethmoidalis Variants Absent bulla Bulla with multiple cells

52. Sinus Lateralis

53. Sinus Lateralis = Suprabullar recess and retrobullar recess

54. Maxillary Sinus

55. Height of Skullbase at Post.Ethmoid

56. Sphenoethmoidal Cell

57. Sphenoid Sinus

58. Sphenoid variations

59. Pneumatisation

60. Anterior Clinoid Process Pneumatisn

61. Dehiscent Optic Nerve & ICA

62. Be careful…

72. Thank You

73. Haller cells multiple Large & flat

74. UP blocking EI