[Dcmlib] GetZSpacing in Varian Dicom RT dose files

[Mathieu Malaterre]

Piotr,

	Thanks a lot for your report ! This is always great to have such 
feedback, but in this case could we get an example of such DICOM file ? 
So that we can add it to our testing suite, and thus make sure that your 
patch always work.

Thanks a bunch
Mathieu

Piotr Kamiński wrote:
> Hello
> 
> File::GetZSpacing returns 0 when reading from a Varian Eclipse DICOM RT DOSE file when you export a calculated dose cube from. 
> 
> But there is another way of guessing the Z-Spacing there - you can get it from the Grid Frame Offset Vector field (0x3004,0x000c), which usually looks like
> 0.0\2.0\4.0...
> 
> Maybe you will consider adding a fix to the GetZSpacing function
> 
> the following works in the stable version but not in the CVS version
> 
> float dummy, z_spacing;
> ValEntry *vr = ff->GetValEntry(0x3004,0x000c);
> sscanf(vr->GetValue().c_str(),"%f\\%f",&dummy,&z_spacing);
> 
> Thanks
> Piotr Kaminski
> 
> 
>  
> 
> 
> 
> 
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