头颅常见病变影像学表现

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Intracranialhaemorrhage-Generalprinciples

Intracranialhaemorrhageisableedinsidetheskull.Itcanbesplitintointra-axialorextra-axial.

Intra-axial,bleedwithinthebrainitself(intraparenchymal,intraventricular);orExtra-axial,bleedbetweenthebrainandtheskull(extradural,subdural,subarachnoid)

Asopposedtoextracranialhaemorrhage(outsidetheskull),i.e.softtissuebruising/haematoma.

Alucidintervalreferstoaninitialdecreaseinconsciouslevel(GCS)duetotheinitialconcussionfromaheadinjury,whichthenimprovesforaperiodoftime(usuallyafewhours)beforedeterioratingagain,thistimeduetoagraduallyenlarginghaematomacausing

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