<prompt> Extradural hemorrhage in NCCT Head is seen as?Hyperdense biconvexHypodense biconcaveHyperdense biconcaveHypodense biconvex  <response>: Extradural hemorrhage EDH: Bleeding occurs between skull and dura mater. Occurs due to the rupture of a middle meningeal aery. Lucid interval Consciousness between two periods of unconsciousness exists. NCCT head in EDH: Biconvex or flame-shaped hyper-density. Subdural hemorrhage SDH: Occurs due to rupture of coical bridging veins. In NCCT it shows concavo-convex or sickle-shaped bleed. 