this PPT gives an insight into the radiological anatomy of temporal bone

1. Dr Zeeshan Ahmad
M.S.(ENT,PGY3)
Department of ENT
NMCH, Patna.06-11-14

2. WHY??
Identify anatomy
Operative planning
Risk assessment
Informed consent

3. Informations
Aeration
Position of dura, Facial and Vessels
Labyrinth
Extension of disease
Evidence of previous surgery

4. Planes
Axial
Coronal
Saggital

5. Planes
Pöschl plane approximates the plane of the
sSCC
Stenvers plane is perpendicular to both the
axial plane and the Pöschl plane

6. AXIAL CUTS

7. Superior SCC
Posterior SCC
Vestibular aqueduct
IAC
Facial
LSCC

8. Superior SCC
Analysing direction – UD or DU
Start Superiorly
Superior SCC comes into view
Seen perpendicular to long axis of temporal
bone

10. Posterior SCC
Posterior SCC appears
Parallel to
Petrous temporal bone

12. Vestibular Aqueduct
Vestibular aqueduct
Veers Ventrally
Onto the posterior fossa surface of TB

15. Inernal Auditory Canal
It is next to appear
All structures anterior to it are cochlear
Posterior to it are vestibular

18. Lateral SCC
Signet ring appearance

21. Ossicles
 Ice cream cone appearance

25. Cochlea
Stack of coins

28. Cochlear aqueduct

30. Facial nerve
Vertical segment
Right 9 o clock
Left 3 o clock

32. CORONAL

42. NEXT 
13.11.14 Dr Sonu Kr Singh
M.S.(ENT,PGY3)
CT Scan of PNS