Level / Window

Set level and window

  • Level/Window sliders and spin boxes
  • Histogram widget
Fig. 1
Fig. 2

Default Level/Window and function are set from DICOM VOI LUT Macro or DICOM Frame VOI LUT Macro, if available.

Image Intensity Windowing (level and window)

Not applicable to shaded surface viewNot applicable to special lookup for labels Labels 4096 and for atlases
  • Applies a linear transformation or sigmoid function to the values of the input image inside a defined interval
  • Values below and above the interval are mapped to constants
  • All computations are performed in the precision of the input's type

Optionally apply palette

  • Available lookup tables
  1. Hot Metal 768
  2. RainbowB 1563
  3. Syngo 1792
  4. DICOM PS3.6 B.1.1 Hot Iron Color Palette
  5. DICOM PS3.6 B.1.3 Metal Blue Color Palette
  6. DICOM PS3.6 B.1.2 PET Color Palette
  7. DICOM PS3.6 B.1.4 PET 20 Steps Color Palette
Default is configurable from Settings dialog


Usually applicable to CT images

  • Examine an image by changing level/window in small steps, specially inside soft tissue range