title: rescale slope and rescale intercept
body: <p>I have few questions about the <strong>rescale slope</strong> and <strong>rescale intercept</strong> in <strong>CT</strong> <strong>DICOM</strong>:</p>
  
  <ol>
  <li>Are they used to transfer original data from the scanner to <strong>Hounsfield</strong> data set, in which water is 0 and air is -1000?</li>
  <li>I am in the image display group. How can I know the rescale slope and the rescale intercept values?</li>
  <li>What's the exact meaning of the rescale slope and the rescale intercept? How are they determined?</li>
  </ol>