Window Level and Width

  • window level: the midpoint of CT/MR value
    • selet the median value of the tissue/organ
  • window width: the range

Typical Settings

  • Liver
    • liver CT (window width 150 H; window level 88 H)
    • liver MR (window )

Water CT Value

the CT value of water is defined as 0. Hence, the regions with negative values are typically empty (usually filled with air).