1. Radiology of common brain diseases

2. Scope Intracranial bleeding Brain ischemia Brain edema
Intracranial tumors
Brain infections
Brain inflammation

6. Intracranial Bleeding
Extradural
Subdural
Subarachnoid
Intraventricular
Intraparenchymal

8. EDH Blood collection between inner table and dura.
Biconvex (lentiform)
Occur at site of impact
95% unilateral, supratentorial
Does not cross sutures
Can cross falx and tentorium
Skull fracture in 90%
Air seen in 20%

9. EDH Arterial 90%, Venous 10% Nontraumatic-rare Lucid interval-50%
C/F: headache, nausia, vomiting, convulsions, herniation.

11. SDH Blood collection between dura and arachnoid. Crescent shape
Supratentorial
Cross sutures, but not dural attachments
May extend along falx and tentorium

12. SDH Trauma is the most common cause Acute: 6hr-3d Subacute: 3d-3w
Chronic: >3w

13. SDH

14. SDH

18. Blood in the suprasellar cistern Blood in the interhemispheric fissure
Blood in the ambient cistern
Blood in the sylvian fissures

19. SAH Blood between pia and arachnoid Traumatic (most common)
Nontraumatic
C/F: headache, vomiting, blurred vision, neck rigidity
Complications: hydrocephalus (acute/delayed), vasospasm, rebleeding.

23. Parenchymal bleed Causes:
HTN, trauma, AVM, aneurysm, permaturity, tumors, infarction, coagulopaty.

24. Trauma

26. Trauma

28. Courtesy: Osborn AG

29. Courtesy: Smithuis R

41. T2WI
FLAIR
DWI

42. FLAIR
DWI

43. Brain edema Vasogenic: Cytotoxic:
Trauma/infection/inflammation/tumors
Cytotoxic:
Ischemia/trauma
Both could be generalized or localized
Both may co-exist

44. Brain edema Imaging findings: Hypodensity on CT
Low signal on T1, high signal on T2 & FLAIR
Loss of GM/WM interface
Compressed ventricles
Effaced sulci & Cisterns
Dense cerebellum
Brain herniation
Vascular compression-ischemia

45. Brain edema
3w later

46. Brain edema

47. Brain edema

48. Brain edema

49. Brain edema Cytotoxic Vasogenic Gray matter White matter Location
Restricted
Non-restricted
DWI
Diffuse
Finger-like
Shape

50. ??
Courtesy of Chong V.

51. ??
Normal

52. ??

53. ??

54. ??

55. Compressed
lateral ventricle
Obliterated
CSF space
Normal sulci
Subdural
hematoma

56. Intracranial bleeding
Brain infarctions
Brain edema