Window Level Manual Min/Max


I am trying to understand how the manual min/max window level and threshold in the volumes tab works. I need to be able to convert back from pixel intensity to Hounsfield units. I use screen capture to obtain a png image and I save the nifti data to know the Hounsfield units. When I plot (using Matlab) the relationship between the Hounsfield units and pixel intensity, I don’t see any relationship to the window level. If there is a simple way to convert from png back to Hounsfield units, please let me know.


Nifti is developed for functional MRI imaging. Try to use nrrd file format instead. Window/Level adjustment is a simple linear mapping of the selected window to 8-bit (0-255) displayable intensity range.

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