<prompt> Which of the following is the classic CT appearance of an acute subdural hematomaLentiformshaped hyperdense lesionCresentshaped hypodense lesionCresentshaped hyperdense lesionLentiformshaped hypodense lesion  <response>: Subdural hematomaCresent concavo-convex shapedHyperdense 23 or mixed 13 in acute casesIsodense in subacuteHypodense in chronic 