<prompt> After head injury, biconvex, lenticular shape hematoma in CT scan is characterstic of which of the following ?Extradural haemorrhageSubdural haemorrhageIntracerebral hematomaDiffuse-axonal injury  <response>: Ans is a ie Extradural haemorrhage CT scan non-contrast is the best diagnostic method to evaluate a head injury pt. better than MRI On CT scan ? Extradural haemorrhage appears as biconvex lentiform opacity. Subdural haemorrhage appears as concavoconvex crescentic opacity. Intracerebral blood appears on small foci, typically at greywhite matter interface, or more centrally in the white matter. 