<P>Peter,<BR>&nbsp; You should convert the data to unsigned char or unsigned short type for the data read by vtkDICOMReader class it short type. <BR>&nbsp; volmap-&gt;SetOutputScalarTypeToUnsignedChar() or volmap-&gt;SetOutputScalarTypeToUnsignedShort();&nbsp; <BR>&nbsp; Please try it.</P>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; shengwen Guo<BR>&nbsp; <BR>&nbsp;South China University of Technology.</P><br><br><a href='http://click.21cn.com/urlhitcounter3.php3?url=http://vgo.21cn.com!freemail_text&key=MV8w&rd=1' target='_blank'><img src='http://mail.21cn.com/ads/Channel/sj_vgo_540x60.gif' width='540' height='60' border='0'></a><br>