Hounsfield unit of CSF in ventricles is generally: (A) -1000 HU, (B) -100 HU, (C) 0 HU, (D) 70 HU
Answer is C. CSF/ water has HU of 0 and is taken as a reference value -1000 HU Is Air -100 HU is Fat 0 HU is CSF/Water 70 HU is acute bleed 130 HU is Contrast 200-250 HU is Calcifications above 400-1000 HU is coical bone.