<prompt> Characteristic CT finding in acute SDH is-Crescent shaped hyperdense lesionBiconvex hyperdense lesionBiconcave hyperdense lesionCrescent shaped hypodense lesion  <response>: Ans. is a i.e. Crescent shaped hyperdense lesion Appearance of hematomas on CT Biconvex lens shaped or lenticular hyperdense23rd or mixed density lesionl3rd - Epidural hematoma. Crescent concao-convex hyperdense 2 weeks or isodense 2-4 weeks or hypodense 4 weeks lesion - subdural hematoma. 