<prompt> Hounsfield unit of CSF in ventricles is generally-1000 HU-100 HU0 HU70 HU  <response>: CSF water has HU of 0 and is taken as a reference value -1000 HU Is Air -100 HU is Fat 0 HU is CSFWater 70 HU is acute bleed 130 HU is Contrast 200-250 HU is Calcifications above 400-1000 HU is coical bone. 