CT head axial - labeling questions

Case contributed by Dr Craig Hacking
Annotated image

Normal CT head (with labels)

The labeled structures are (excluding the correct side):

  1. foramen magnum
  2. medulla oblongata
  3. vertebral artery
  4. cerebellar tonsil
  5. premedullary cistern
  6. internal jugular vein
  7. basilar artery
  8. sigmoid sinus
  9. petrous internal carotid artery in the carotid canal
  10. cerebellar hemisphere
  11. external auditory canal
  12. foramen of Magendie
  13. superior orbital fissure
  14. Meckel's cave
  15. foramen of Luschka
  16. crista galli
  17. pituitary fossa
  18. pons
  19. gyrus rectus
  20. cavernous ICA in the cavernous sinus
  21. left temporal pole
  22. prepontine cistern
  23. middle cerebellar peduncle
  24. uncus
  25. temporal horn of the lateral ventricle
  26. fourth ventricle
  27. nodule of the cerebellum
  28. MCA M1 segment
  29. suprasellar cistern
  30. tentorium cerebelli
  31. interpeduncular cistern
  32. cerebral crus (peduncle)
  33. slyvian fissure
  34. mammillary bodies
  35. median interhemispheric fissure
  36. midbrain
  37. ambient cistern
  38. cerebral aqueduct (of Sylvius)
  39. third ventricle
  40. inferior colliculus
  41. torcula herophili (confluence of the sinuses)
  42. anterior limb of the internal capsule
  43. interventricular foramen (of Monroe)
  44. insular cortex
  45. transverse sinus
  46. genu of the corpus callosum
  47. frontal horn of the lateral ventricle
  48. genu of the internal capsule
  49. quadrigeminal cistern
  50. head of the caudate nucleus
  51. lentiform nucleus
  52. pineal gland
  53. superior vermis of the cerebellum
  54. column of the fornix
  55. posterior limb of the internal capsule
  56. internal cerebral vein
  57. straight sinus
  58. cingulate gyrus
  59. septum pellucidum
  60. thalamus
  61. forceps minor
  62. trigone (atrium) of the lateral ventricle
  63. occipital lobe
  64. splenium of the corpus callosum
  65. occipital horn of the lateral ventricle
  66. body of the lateral ventricle
  67. choroid plexus
  68. forceps major
  69. inferior sagittal sinus
  70. body of the corpus callosum
  71. centrum semiovale
  72. central sulcus (of Rolando)
  73. hand bump of the pre central gyrus (primary motor cortex)
  74. marginal sulcus (pars marginalis)
  75. superior sagittal sinus
  76. falx cerebri
CT

Normal CT head (without labels)

The same normal brain CT without labels for reference.

Case Discussion

The labeled structures are (excluding the correct side):

  1. foramen magnum
  2. medulla oblongata
  3. vertebral artery
  4. cerebellar tonsil
  5. premedullary cistern
  6. internal jugular vein
  7. basilar artery
  8. sigmoid sinus
  9. petrous internal carotid artery in the carotid canal
  10. cerebellar hemisphere
  11. external auditory canal
  12. foramen of Magendie
  13. superior orbital fissure
  14. Meckel's cave
  15. foramen of Luschka
  16. crista galli
  17. pituitary fossa
  18. pons
  19. gyrus rectus
  20. cavernous ICA in the cavernous sinus
  21. left temporal pole
  22. prepontine cistern
  23. middle cerebellar peduncle
  24. uncus
  25. temporal horn of the lateral ventricle
  26. fourth ventricle
  27. nodule of the cerebellum
  28. MCA M1 segment
  29. suprasellar cistern
  30. tentorium cerebelli
  31. interpeduncular cistern
  32. cerebral crus (peduncle)
  33. slyvian fissure
  34. mammillary bodies
  35. median interhemispheric fissure
  36. midbrain
  37. ambient cistern
  38. cerebral aqueduct (of Sylvius)
  39. third ventricle
  40. inferior colliculus
  41. torcula herophili (confluence of the sinuses)
  42. anterior limb of the internal capsule
  43. interventricular foramen (of Monroe)
  44. insular cortex
  45. transverse sinus
  46. genu of the corpus callosum
  47. frontal horn of the lateral ventricle
  48. genu of the internal capsule
  49. quadrigeminal cistern
  50. head of the caudate nucleus
  51. lentiform nucleus
  52. pineal gland
  53. superior vermis of the cerebellum
  54. column of the fornix
  55. posterior limb of the internal capsule
  56. internal cerebral vein
  57. straight sinus
  58. cingulate gyrus
  59. septum pellucidum
  60. thalamus
  61. forceps minor
  62. trigone (atrium) of the lateral ventricle
  63. occipital lobe
  64. splenium of the corpus callosum
  65. occipital horn of the lateral ventricle
  66. body of the lateral ventricle
  67. choroid plexus
  68. forceps major
  69. inferior sagittal sinus
  70. body of the corpus callosum
  71. centrum semiovale
  72. central sulcus (of Rolando)
  73. hand bump of the pre central gyrus (primary motor cortex)
  74. marginal sulcus (pars marginalis)
  75. superior sagittal sinus
  76. falx cerebri
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Case information

rID: 62252
Published: 16th Aug 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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