[vtkusers] How to understand the slab thickness, slab resolution, spacing

David Cole DLRdave at aol.com
Wed Aug 2 10:48:11 EDT 2017

vtkImageData is a regularly spaced collection of *point* samples,
there is no "thickness"...

Please refer to the classic "A Pixel Is Not A Little Square" :

Also, a shorter summary here:

David C.

On Wed, Aug 2, 2017 at 10:39 AM, zhang qiang <zhang07101 at 126.com> wrote:
> Dear David:
>      Thanks a lot. And the vtkImageData also do not record the thickness
> information. I wonder why VTK ignore the thickness information? I think the
> thickness information is quite important for DICOM image. My guess is that
> we can not obtain the image whose thickness is 0.4 from the image whose
> thickness is 0.8. So,  the thickness information is useless in vtkImageData?
> Am I right?
> zhang qiang
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