CT head sagittal - labeling questions

Case contributed by Dr Craig Hacking
Annotated image

Normal CT head (with labels)

The labeled structures are (excluding the correct side):

  1. mastoid air cells
  2. temporalis muscle
  3. zygomatic arch
  4. external auditory (acoustic) canal
  5. temporomandibular joint
  6. tentorium cerebelli
  7. sylvian fissure
  8. temporal lobe
  9. occipital lobe
  10. carotid canal
  11. trigone (atrium) of the lateral ventricle
  12. centrum semiovale
  13. forceps minor
  14. frontal lobe
  15. superior orbital fissure
  16. cerebellum
  17. body of the lateral ventricle
  18. head of the caudate nucleus
  19. cavernous sinus
  20. thalamus
  21. occipital lobe
  22. middle cerebellar peduncle
  23. genu of the corpus callosum
  24. splenium of the corpus callosum
  25. cerebral peduncle (crus)
  26. superior sagittal sinus
  27. body of the corpus callosum
  28. great cerebral vein (of Galen)
  29. internal cerebral veins
  30. inferior colliculus
  31. optic chiasm
  32. pons
  33. fourth ventricle
  34. medulla
  35. cerebellar tonsil
  36. marginal sulcus (pars marginalis)
  37. cingulate sulcus
  38. cingulate gyrus
  39. body of the fornix
  40. pineal gland
  41. mammillary bodies
  42. cerebral aqueduct (of Sylvius)
  43. interpeduncular cistern
  44. pituitary gland
  45. foramen of Magendie
  46. basion
  47. opisthion
  48. central sulcus (of Rolando)
  49. rostrum of the corpus callosum
  50. straight sinus
  51. superior colliculus
  52. suprasellar cistern
  53. torcula herophili (confluence of the sinuses)
  54. basilar artery
  55. odontoid process of C2
  56. cervical spinal cord
  57. precentral gyrus (primary motor cortex)
  58. postcentral gyrus (primary somatosensory cortex)
  59. quadrigeminal cistern
  60. tuberculum sellae
  61. dorsum sellae
  62. prepontine cistern
  63. anterior arch of C1
  64. clivus
  65. pharyngeal tonsil
  66. frontal horn of the lateral ventricle
  67. posterior arch of C1
  68. frontal pole
  69. carotid canal
  70. trapezius muscle
  71. hippocampal tail adjacent to choroid plexus (above)
  72. cavernous sinus
  73. occipital horn of the lateral ventricle
  74. cerebellopontine angle cistern
  75. transverse sinus
  76. forceps major
  77. temporal horn of the lateral ventricle
  78. temporal pole
  79. coronoid process of mandible
  80. sigmoid sinus
  81. neck of mandible
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. mastoid air cells
  2. temporalis muscle
  3. zygomatic arch
  4. external auditory (acoustic) canal
  5. temporomandibular joint
  6. tentorium cerebelli
  7. sylvian fissure
  8. temporal lobe
  9. occipital lobe
  10. carotid canal
  11. trigone (atrium) of the lateral ventricle
  12. centrum semiovale
  13. forceps minor
  14. frontal lobe
  15. superior orbital fissure
  16. cerebellum
  17. body of the lateral ventricle
  18. head of the caudate nucleus
  19. cavernous sinus
  20. thalamus
  21. occipital lobe
  22. middle cerebellar peduncle
  23. genu of the corpus callosum
  24. splenium of the corpus callosum
  25. cerebral peduncle (crus)
  26. superior sagittal sinus
  27. body of the corpus callosum
  28. great cerebral vein (of Galen)
  29. internal cerebral veins
  30. inferior colliculus
  31. optic chiasm
  32. pons
  33. fourth ventricle
  34. medulla
  35. cerebellar tonsil
  36. marginal sulcus (pars marginalis)
  37. cingulate sulcus
  38. cingulate gyrus
  39. body of the fornix
  40. pineal gland
  41. mammillary bodies
  42. cerebral aqueduct (of Sylvius)
  43. interpeduncular cistern
  44. pituitary gland
  45. foramen of Magendie
  46. basion
  47. opisthion
  48. central sulcus (of Rolando)
  49. rostrum of the corpus callosum
  50. straight sinus
  51. superior colliculus
  52. suprasellar cistern
  53. torcula herophili (confluence of the sinuses)
  54. basilar artery
  55. odontoid process of C2
  56. cervical spinal cord
  57. precentral gyrus (primary motor cortex)
  58. postcentral gyrus (primary somatosensory cortex)
  59. quadrigeminal cistern
  60. tuberculum sellae
  61. dorsum sellae
  62. prepontine cistern
  63. anterior arch of C1
  64. clivus
  65. pharyngeal tonsil
  66. frontal horn of the lateral ventricle
  67. posterior arch of C1
  68. frontal pole
  69. carotid canal
  70. trapezius muscle
  71. choroid plexus
  72. cavernous sinus
  73. occipital horn of the lateral ventricle
  74. cerebellopontine angle cistern
  75. transverse sinus
  76. forceps major
  77. temporal horn of the lateral ventricle
  78. temporal pole
  79. coronoid process of mandible
  80. sigmoid sinus
  81. neck of mandible
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Case information

rID: 62556
Published: 23rd Aug 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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