Window width and center calculation of DICOM image

Question

What is \"rescale intercept\" and \"rescale slope\" in DICOM image (CT)? How to calculate window width and window center with that?

Answer 1

Rescale intercept and slope are a simple linear transform applied to the raw pixel data before applying the window width/center. The basic formula is:

NewValue = (RawPixelValue * RescaleSlope) + RescaleIntercept