[Gate-users] Dose by regions issue...

[David Sarrut]

Hi Nicolas,

strange indeed. The two functions that compute the volume of the regions
are:
-
https://github.com/OpenGATE/Gate/blob/develop/source/digits_hits/src/GateRegionDoseStat.cc#L67
and
-
https://github.com/OpenGATE/Gate/blob/develop/source/digits_hits/src/GateRegionDoseStat.cc#L92

Both called from here :
https://github.com/OpenGATE/Gate/blob/86083caae3a4f41903b3d1e3c3d5571e807e041e/source/digits_hits/src/GateDoseActor.cc#L365

I am unsure what is done there about the mMapLabelToSeveralRegions, but the
behavior you observe may come from there.
Can you please provide us with a minimal working example that shows the bug
?

Cheer,
David


On Mon, May 2, 2022 at 4:30 PM Nicolas Chouin <
nicolas.chouin at oniris-nantes.fr> wrote:

> Dear all,
>
> I have encountered one issue with the DoseByRegion option or maybe I did
> something wrong...
> My issue is related to the volumes displayed in the DoseByRegions output
> file. This volume did not correspond to the number of voxels (multiplied by
> the voxel size) I counted manually on my images. I can provide details of
> my macro if needed.
> Playing around with the DoseByRegions option, I observed that this issue
> only occurs for contiguous regions composed by the same material (but with
> a different ID; i.e. voxels have different values in each region). Even
> more striking, if I launched my simulations twice, only changing the
> material of the regions in the second simulation), I obtained different
> volumes in the DoseByRegions output files… whereas, obviously, the volume
> does not depend on the voxel composition.
>
> Has anyone encountered similar issues?
>
> Best regards,
>
>
> Nicolas Chouin, PhD
> Associate professor
>
>
> Research team: « Nuclear Oncology », CRCI2NA INSERM U1307, Nantes
>
> ONIRIS
> Site de la Chantrerie - CS 40706
> 44307 Nantes, cedex 03, France
> Tel: +33-2-40-68-78-65
>
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
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>
>

-- 
David Sarrut, Phd
Directeur de recherche CNRS
CREATIS, UMR CNRS 5220, Inserm U1294
Centre de lutte contre le cancer Léon Bérard
28 rue Laënnec, 69373 Lyon cedex 08
Tel : 04 78 78 51 51 / 06 74 72 05 42
http://dsarrut.github.io
_________________________________
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