<prompt> Which of the following shows biconvex shape on CT-Epidural hematomaSubdural hematomaBothNone  <response>: Ans. is a i.e., Epidural hematoma o Biconvex lens shaped or lenticular hyperdense23rd or mixed density lesion 1 3rd - Epidural hematomao Crescent concao-convex hyperdense 2 weeks or isodense 2-4 weeks or hypodense 4 weeeks lesion - subdural hematoma 