title: Why my pixel value of DICOM is beyond 'Largest Image Pixel Value' attribute?
body: <p>I'm using dcmtk to fetch image data from dicom data. Now I have following information for a sample image:</p>
  
  <ul>
  <li>(0028,0002)  Samples per Pixel: 1 </li>
  <li>(0028,0004)  Photometric Interpretation: MONOCHROME2 </li>
  <li>(0028,0010)  Rows: 256</li>
  <li>(0028,0011)  Columns: 256</li>
  <li>(0028,0030)  Pixel Spacing: 1.5625\1.5625 </li>
  <li>(0028,0100)  Bits Allocated: 16</li>
  <li>(0028,0101)  Bits Stored: 12</li>
  <li>(0028,0102)  High Bit: 11</li>
  <li>(0028,0103)  Pixel Representation: 0</li>
  <li>(0028,0106)  Smallest Image Pixel Value: 1</li>
  <li>(0028,0107)  Largest Image Pixel Value: 1060</li>
  <li>(0028,1050)  Window Center: 474 </li>
  <li>(0028,1051)  Window Width: 1000</li>
  <li>(0028,1055)  Window Center &amp; Width Explanation: Algo1</li>
  </ul>
  
  <p>When I applied the window/center value to real pixel value of data, then many of them is white. I iterate on pixel values and then I found many pixel value (larger than 80 percent) is beyond <em>Largest Image Pixel Value</em>. Many of them are beyond of 5x of largest! This made my resulting image near to complete white. Strangely I don't why when I divide pixel values to 256 then the resulting image is near to the image that I expect. I can't understand why it's true.</p>
  
  <p>Maybe it's good to see other unknown attribute :</p>
  
  <ul>
  <li>(0019,1009)  Unknown: 1.0 </li>
  <li>(0019,100b)  Unknown: 245 </li>
  <li>(0019,1016)  Unknown: 25.53 </li>
  </ul>
  
  <p>Why this happend to my image?</p>