[Insight-users] Re: Bug 1056

[Luis Ibanez]

Hi Uwe,

Thanks a lot for your detailed message and for editing
the bug in the database.

Following your hints, we just added an extra step to the
parsing in order to recover the second number in the
tag 0028x0030.  We are now searching for the separator
and taking the second part of the string.

This has been committed to CVS so you can give it a try.

We are still unclear regarding the order of the spacing.
That is, whether the first value is suppossed to be the
spacing in X (PixelSpacing[0]) or the spacing in Y
(PixelSpacingg[1])


If you have a chance, please give it a try at the CVS
version and let us konw what you find.


    Thanks



       Luis




-------------------------
Dr. Uwe Köhler wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Dear Luis,
> 
> I tried to post a comment to the bug, but the system forgot most of it: 
> 
> I have images with non-isotropic in-plane resolution and ITK cannot interpret 
> the pixel spacing. According to the DICOM standard you do get the ROW spacing 
> first and then the COL spacing. 
> 
> - From the standard:
> Physical distance in the patient between the center of each pixel, specified 
> by a numeric pair - adjacent row spacing (delimiter) adjacent column spacing 
> in mm.
> 
> I also seem to get rounding errors, however I can live with those. I just 
> cannot fix the DICOM code
>   if (len > 0)
>     {
>     fval = DICOMFile::ReturnAsFloat(val, 
> parser->GetDICOMFile()->GetPlatformIsBigEndian());
>     }
> 
>   if (group == 0x0028 && element == 0x0030)
>     {
>     this->PixelSpacing[0] = this->PixelSpacing[1] = fval;
>     }
>   else if (group == 0x0018 && element == 0x0050)
>     {
>     this->PixelSpacing[2] = fval;
>     }
> 
> since val should have more than one value. Could you fix that?
> 
> Cheers
> 
> Uwe
> - -- 
>  |                                                                 |
> - -+-----------------------------------------------------------------+-
>  |  Dr. Uwe Köhler              MR - Physics                       | 
>  |                              German Heart Institute Berlin      |
>  |                              Augustenburger Platz 1             |
>  |                              D - 13353 Berlin                   |
>  |          ////                Germany                            |
>  |         (@ @)                Phone: +49 172 98 11 598           |
> - -+-----oOO--(_)--OOo-----------------------------------------------+-
>  | <URL:http://www.ed.ac.uk/~ukoehler>   <mailto:UKoehler at dhzb.de> |
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.4 (GNU/Linux)
> 
> iD8DBQFBubBEzFGNh0avvlkRAi15AKCS83hM6ar99jXFYsuSuqcLWZidPQCeMNvm
> xIy3SvjpK/vzGHKIfgR46iU=
> =sBUq
> -----END PGP SIGNATURE-----
> 
>