Basic reading computed tomography (ct) of brain

Basic Reading Computed Tomography (CT) of BrainBasic Reading Computed Tomography (CT) of Brain

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Systemic Approach to Head CT InterpretationSystemic Approach to Head CT Interpretation

• Symmetry – Compare left and right side of the cranium

• Midline – Look for midline shift

• Cross-sectional anatomy – Review anatomical landmark for each slide– Brain tissue : gray matter, white matter , intracerebral lesions– CSF space : ventricle, basal cistern, cortical sulci, fissure– Skull and soft tissue : scalp swelling, fractures, sinuses, orbit

• Subdural windows : Look for blood collection adjacent to the skull

• Bone windows : Skull, orbit and sinuses, intracranial air

Lateral View of BrainLateral View of Brain

Ventricular SystemVentricular System

Cross-sectional AnatomyCross-sectional Anatomy

• Grey/White interface, Subcortical white matter

Cross-sectional AnatomyCross-sectional Anatomy

• Paired of crescent-shape = Twin bananas

Cross-sectional AnatomyCross-sectional Anatomy

Basal gangliaBasal ganglia

Cross-sectional AnatomyCross-sectional Anatomy

• Third ventricle, Basal ganglia, Superior cerebellar cistern

HydrocephalousHydrocephalous

Physiologic CalcificationPhysiologic Calcification

Brain AnatomyBrain Anatomy

Cross-sectional AnatomyCross-sectional Anatomy

• Third ventricle, Smiley face

Cross-sectional AnatomyCross-sectional Anatomy

• Midbrain, Interpeduncular cistern

Cross-sectional AnatomyCross-sectional Anatomy

• Star shape ~ Circle of Willis, • Fourth ventricle, Temporal horn ~ slit

Subarachnoid hemorrhageSubarachnoid hemorrhage

Cross-sectional AnatomyCross-sectional Anatomy

• Base of skull, Midline bony prominence, • Prepontine cistern, Pretrous bone, Frontal sinus

Cross-sectional AnatomyCross-sectional Anatomy

• Orbits, Ethmoid air cell

The End…The End…