[Insight-users] Problem while reading dicom series --> wrong positioning in the space

["Eliana M. Vásquez Osorio"]

Hello itk-users.
I came across a problem while reading dicom series. I got 100 slices of 
512x512 pixels.

Checking the image tags with a viewer, I can see that the dicom header 
'0020|1041': Slice Location vary between
1339.18 and 1636.12. And the '0020|0032': Image Position Patient vary 
between [0, 0, -1339.18] and [0, 0, -1636.12] .

When I read the image, using ImageSeriesReader + GDCMImageIO, the volume 
Z-coordinate vary between
-1339.18 and -1048.13.
I wonder is why the Z-coordinate changes the range from (-1636.12 and 
-1339.18) to (-1339.18 and -1048.13)...
... Any idea?

I checked the Image Orientation tag '0020|0037', and it is 1\0\0\0\-1\0. 
That will account for the minus in the Z, but not for the change in the 
range. I think it's something related to the scaling, when it is defined...


Regards,

-- 
Eliana M. Vásquez Osorio
PhD Student (OIO)
Erasmus Medical Center - Daniel den Hoed Cancer Center
Department of Radiation Oncology
Groene Hilledijk 301 
3075 EA Rotterdam
The Netherlands

T: +31 10 – 43 91 491 
F: +31 10 – 43 91 012
E-mail: e.vasquezosorio at erasmusmc.nl