CT temporal bone sagittal - labeling questions

The labeled structures are (excluding the correct side):

1. sigmoid groove
2. cartilaginous external auditory (acoustic) canal
3. mastoid air cell
4. zygomatic process of temporal bone
5. mandibular fossa of temporal bone
6. mastoid process
7. mastoid antrum
8. aditus ad antrum
9. short process of the incus
10. temporomandibular joint
11. scutum
12. osseous external auditory (acoustic) canal
13. tegmen tympani
14. head of the malleus
15. epitympanum
16. incudomalleolar joint
17. mastoid segment of chorda tympani
18. occipitomastoid suture
19. mandibular condyle
20. posterior (second) genu of the facial nerve
21. long process of the incus
22. articular eminence of temporal bone
23. manubrium of the malleus
24. mastoid segment of the facial nerve
25. posterior semicircular canal
26. tympanic segment of the facial nerve
27. stylomastoid foramen
28. superior semicircular canal
29. stapes
30. lateral semicircular canal
31. mesotympanum
32. utricle of the vestibule
33. anterior (first) genu of the facial nerve
34. oval window
35. saccule of the vestibule
36. tympanic membrane
37. vestibular aqueduct
38. cochlear promontory
39. round window niche
40. labyrinthine segment of the facial nerve
41. hypotympanum
42. apical turn of the cochlea
43. tensor tympani muscle
44. middle turn of the cochlea
45. styloid process
46. basal turn of the cochlea
47. carotid plate
48. internal auditory (acoustic) canal (meatus)
49. sphenozygomatic suture
50. pars vascularis of jugular foramen
51. cochlear aqueduct
52. porus acousticus
53. carotid canal
54. pharyngotympanic tube
55. pars nervosa of jugular foramen
56. occipital condyle
57. lateral mass of atlas (C1)
58. atlanto-occipital joint

The same normal temporal bone CT without labels for reference.