Radiology-I.pptx
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This document contains descriptions and images of various normal and pathological findings on MRI and CT scans of the brain. It includes images and descriptions of cerebral atrophy, leucomalacia, infarcts, hemorrhages, tumors, infections, hydrocephalus, encephaloceles, Chiari malformations, and schizencephaly. The images provide examples of how these conditions appear on different MRI sequences and on CT scans.
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- 2. Normal MRI T1W image
- 3. Normal CT scan of the Brain
- 4. Normal MRI T2W images
- 5. Normal MRI brain Cerebral hemisphere atrophy
- 6. Periventricular leucomalacia( loss of white matter) dilated ventricle, prominent sulci(atrophy) , caused by ischemia usually
- 7. Coronal FLAIR image (modified T2) Coronal T2W images showing white CSF fluid
- 8. Acute ischemic infarction on CT scan (hypodense area)
- 11. Acute Cerebral hematoma surrounding by edema (hypodense) on CT scan (hyperdense)
- 12. Epidural hematoma CT scan Biconvex shaped, caused by AI, no skull fracture, no extracranial soft tissue swelling, classical lucid interval may present in history Acute subdural hematoma CT scan concavo-convex( cresent) shaped. Hyperdense initially, isodense 7-10 days, hypodense 3-4 wks. Mostly caused by NAI, bridging veins
- 13. Subarachnoid hemorrhage on CT scan (hyperdense into sulci) No blood in the ventricles.
- 15. MRI T2W images showing hypointense lesion in right temporal lobe with surrounding edema – representing tuberculoma.
- 16. T1W post contrast images show multiple ring enhancing lesions without evidence of surrounding edema. Significant leptomeningeal enhancement also noted.
- 17. Tuberculomas a. Hypointense on T1 b. Hypointense on T2 surrounding by edema c. Hypointense on FLAIR e. Showing ring enhancement on post contrast T1W image. Mild surrounding edema
- 20. Brain abscess on contrast enhanced CT scan and T2W MRI image. Significant surrounding edema and mid line shifting also seen
- 21. causes • Meningitis • Csom n sinusitis • Head n neck infection • Trauma
- 22. T1W post contrast image showing Mastoiditis with brain abscess in right cerebellar hemisphere.
- 23. T1W post contrast image showing Mastoiditis with brain abscess in left temporal lobe.
- 24. MRI images showing single metastatic deposit with surrounding edema and enhancement on post contrast images..
- 25. Dilated all the ventricles with transependymal CSF seepage – Communicating acute hydrocephalus
- 27. Dilated both lateral ventricles and 3rd ventricle. 4th ventricle is normal representing non communicating hydrocephalus. Mass seen within 3rd ventricle.
- 28. Non communicating hydrocephalus. Both lateral ventricles dilated only. Hyperdense lesion in midline is colloid cyst.
- 29. Enhancing mass in 4th ventricle - Medulloblastoma
- 30. All images showing cystic mass with enhancing mural nodule – juvenile pilocytic astrocytoma. Differential diagnosis is hemangioblastoma
- 32. Intensely enhancing mass in ventricle – Choroid plexus papilloma
- 33. Large mass with mild surrounding edema - PNET
- 37. Encephalocele
- 38. DWS
- 40. • Cerebelr tonsils n vermis r herniated through foramn magnum • 1 : mild hrniation , isolated • 2 : 4th ventrcle displaced downwrd
Editor's Notes
- Hyperintense area