MRI pituitary gland sagittal T1 post contrast - labeling questions

The labeled structures are (excluding the correct side):

1. canalicular segment of optic nerve
2. laceral segment of internal carotid artery
3. head of caudate nucleus
4. thalamus
5. cavernous segment of internal carotid artery
6. body of lateral ventricle
7. anterior arch of C1 (atlas)
8. optic tract
9. cisternal segment of optic nerve
10. cavernous sinus
11. inferior colliculus
12. posterior clinoid process
13. fourth ventricle
14. premedullary cistern
15. body of corpus callosum
16. mamillary body
17. anterior pituitary gland
18. medulla oblongata
19. genu of corpus callosum
20. internal cerebral veins
21. A2 (post communicating) segment of anterior cerebral artery
22. cerebral aqueduct (of Sylvius)
23. suprasellar cistern
24. dorsum sellae
25. basilar artery
26. callosomarginal artery
27. quadrigeminal plate cistern
28. hypothalamus
29. optic chiasm
30. interpeduncular cistern
31. pituitary stalk
32. posterior pituitary gland
33. superior colliculus
34. tuberculum sellae
35. pons
36. clivus
37. splenium of corpus callosum
38. A1 (pre communicating) segment of anterior cerebral artery
39. prepontine cistern
40. nasopharynx
41. ophthalmic segment of internal carotid artery
42. sphenoid sinus
43. terminal segment of internal carotid artery
44. cerebral peduncle (crus)
45. cavernous segment of internal carotid artery
46. M1 (horizontal) segment of middle cerebral artery
47. middle cerebellar peduncle

The same normal pituitary MRI T1 with contrast without labels for reference.