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<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff size=2>If
you use DICOMImageIO2, does the spacing come back correctly? It may not because
neither DICOMImageIO2 or DicomImageIO is looking for tag
0x0018,0x0088</FONT></SPAN></DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff size=2>In
the DICOM "standard", there is no universally selected manner to determine the
spacing between slices. Some vendors use a specific tag for slice spacing, some
use a specific tag for slice location (and you have to compare two adjacent
slices to determine the spacing), and some use the ImagePositionPatient tags to
specify the </FONT></SPAN></DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff
size=2>location of slices (and you have to compare two adjacent slices to
determine the spacing). None of these are required by the standard. And
sometimes the values</FONT></SPAN></DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff size=2>in
them are plain wrong.</FONT></SPAN></DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff size=2>The
best way we have found to determine the spacing between slices is to use the
ImagePositionPatient tags. This is what DICOMImageIO2 uses so it may
report the correct spacing even though it is not looking for tag
0x0018,0x0088.</FONT></SPAN></DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=715403014-28072004><FONT face=Verdana color=#0000ff
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Yixun Liu
[mailto:yxliu@fudan.edu.cn]<BR><B>Sent:</B> Wednesday, July 28, 2004 5:13
AM<BR><B>To:</B> insight-users@itk.org<BR><B>Subject:</B> [Insight-users]
about the DicomImageIO<BR><BR></FONT></DIV>
<DIV><FONT face=Arial>Hi ITKusers,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial> I
intend to use the itkImageSeriesReader combined with the itkDicomImageIO to
read DICOM series. The spacing obtained by the itkDicomImageIO is
0.9735x0.9735x1. However, when I use the tool Dicom2 to read the tag of the
DICOM file, I find the spacing between the slices is 3.000000 which is
shown below.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>
Echo Number(s) (0018,0086)
1-n IS [1]<BR> Magnetic Field
Strength (0018,0087)
1 DS [15000]<BR>
Spacing Between Slices (0018,0088)
1 DS
[<STRONG>3.000000</STRONG>]<BR> Echo Train
Length (0018,0091)
1 IS
[0]<BR> Percent Sampling
(0018,0093)
1 DS [100.000000] </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Why the itkImageIO can not read the correct spacing
between the slices?</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Thanks a lot</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Regards,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Yixun Liu</FONT></DIV></BLOCKQUOTE></BODY></HTML>