<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Hi all,</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I've got a running program using the vtkPNGReader which produces a nicely rendered image from a stack of .png files. However, when I use the same program except for using the vtkDICOMImageReader to read in a stack of .dcm files, I get a flat image, as if the DICOM reader has no sense of the z-dimension. Here's a snippet of my code, with the working PNG part commented out.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">vtkDICOMImageReader *DR = vtkDICOMImageReader::New();</SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> DR->SetDirectoryName(argv[</SPAN></FONT><FONT class="Apple-style-span" color="#1B08FF" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">1</SPAN></FONT><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">]);</SPAN></FONT></DIV><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> </SPAN></FONT></P><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> </SPAN></FONT><FONT class="Apple-style-span" color="#2A6E23" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">//vtkPNGReader *PR = vtkPNGReader::New();</SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> </SPAN></FONT><FONT class="Apple-style-span" color="#2A6E23" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">//PR->SetFilePrefix (argv[1]);</SPAN></FONT></DIV><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> </SPAN></FONT></P><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> vtkMarchingContourFilter *boneExtractor = vtkMarchingContourFilter::New();</SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> boneExtractor->SetInput(DR->GetOutput()); </SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;"> boneExtractor->SetValue(</SPAN></FONT><FONT class="Apple-style-span" color="#1B08FF" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">0</SPAN></FONT><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">, </SPAN></FONT><FONT class="Apple-style-span" color="#1B08FF" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">200</SPAN></FONT><FONT class="Apple-style-span" face="Monaco" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;">);</SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">It works fine if I comment out the DICOM part and use the PNG reader for .png files. Why can't the DICOM parser see that there is a z-dimension? I know that the .dcm files are good since I can examine them using OsiriX. Thanks in advance for any help.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">WIlly</DIV></BODY></HTML>