[Gate-users] Crashing with a detector nested in a vox phantom

[David Sarrut]

should be an issue with volume overlap. It seems from the error message
that "SPECThead" is a daughter of "voxPhantom" (and outside), it should
not.

David

On Mon, Sep 5, 2016 at 12:33 PM, Francisco Pinto <
francisco.pinto at surgiceye.com> wrote:

> Dear David,
>
>
>
> Thank you once more for your assistance and your hint regarding MHD!
>
>
>
> - simulation with vox + source outside the volume (check everything is ok)
>
>
>
> This fails with a descriptive error message:
>
>
>
> -------- EEEE ------- G4Exception-START -------- EEEE -------
>
> *** G4Exception : GeomMgt0002
>
>       issued by : G4SmartVoxelHeader::BuildNodes()
>
> PANIC! - Overlapping daughter with mother volume.
>
>          Daughter physical volume SPECThead_phys
>
>          is entirely outside mother logical volume voxPhantom_log !!
>
> *** Fatal Exception *** core dump ***
>
>
>
> The source being inside or outside the bounds of the vox phantom leads to
> the same outcome: the same crash as described in my initial email. Do you
> perhaps have further insights?
>
>
>
> Thank you very much once more!
>
>
>
> Cheers,
>
> Francisco
>
>
>
>
>
> *From:* David Sarrut [mailto:David.Sarrut at creatis.insa-lyon.fr]
> *Sent:* 02 September 2016 08:46
> *To:* Francisco Pinto <francisco.pinto at surgiceye.com>
> *Cc:* gate-users at lists.opengatecollaboration.org; Philipp Matthies <
> Philipp.Matthies at surgiceye.com>
> *Subject:* Re: [Gate-users] Crashing with a detector nested in a vox
> phantom
>
>
>
> Hello Francisco,
>
>
>
> does it works if the volumes do not overlap ? Try step by step:
>
> - simulation with vox + source outside the volume (check everything is ok)
>
> - simulation with vox + source inside the volume (check everything is ok)
>
> - simulation with vox + ouside source + outside spect system (check
> everything is ok)
>
> - end with your final goal
>
>
>
> btw, I recommend to use mhd file format rather than hdr (see wiki).
>
>
>
> David
>
>
>
>
>
> On Tue, Aug 30, 2016 at 2:10 PM, Francisco Pinto <
> francisco.pinto at surgiceye.com> wrote:
>
> Dear fellow Gate users,
>
>
>
> I am simulating the current scenario:
>
> - A voxelized phantom defined via a CT dataset in Analyze format.
>
> - A source placed inside the phantom.
>
> - A simple detector aiming towards the source.
>
>
>
> I would like to overlap the detector with the CT dataset. To this end, I
> changed the voxelized phantom to an ImageRegionalizedVolume and made my
> detector its daughter. Sadly, Gate crashes. I’ve narrowed this down the
> crash to GateCrystalSD::FindSystem(G4String&) – voxPhantom cannot be
> found.
>
>
>
> I'm using the latest develop Gate on Ubuntu 16.04, CPU-only single core
> simulation. All relevant short scripts + CT dataset here (23MB tgz):
> https://drive.google.com/open?id=0BzM9gTEQ3DYybEdvR0RoV3I3bzA
>
>
>
> Any insights would be much appreciated! Thanks in advance!
>
>
>
> Cheers,
>
> Francisco
>
>
>
> Francisco Pinto
>
>
>
> Principal Software Engineer
>
> SurgicEye GmbH
>
> Tel: +49 89 54 99 89 0 - 21
>
>
>
>
> _______________________________________________
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> Gate-users at lists.opengatecollaboration.org
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>
>
>
>
>
> --
>
> David Sarrut, Phd
> Directeur de recherche CNRS
> CREATIS, UMR CNRS 5220, Inserm U1206
>
> 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://www.creatis.insa-lyon.fr/~dsarrut
> _________________________________
>
>  "2 + 2 = 5,  for extremely large values of 2"
> _________________________________
>



-- 
David Sarrut, Phd
Directeur de recherche CNRS
CREATIS, UMR CNRS 5220, Inserm U1206
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://www.creatis.insa-lyon.fr/~dsarrut
_________________________________
 "2 + 2 = 5,  for extremely large values of 2"
_________________________________
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