[Gate-users] Gate-users Digest, Vol 83, Issue 16

[Thibault Mauxion]

Looks good to me, it just means that your fractional standard deviations at the voxel level are equal to 1. You need to run more particles to have these numbers going down. 

Tibo 

Le 22 avr. 2013 à 14:07, Janus a écrit :

> Hi, Thibault:
>  
> Thanks for your kind reply. I have used the command: /gate/NCAT/setSkipEqualMaterials 0 as you suggested, but I got "1 1 1 1 1 1 1 1 1 ... " in file PhantomDose-Dose-Uncertainty.txt. It seems worse than NaN issue. I do not know what is wrong. Do you have any other suggestion? Thanks in advance.  
>  
> Looking forward to hearing from you.
>  
> Regards,
> Janus
>  
>  
>  
> Message: 2
> Date: Fri, 19 Apr 2013 09:58:21 +0200
> From: Thibault Mauxion <thibault_mauxion at hotmail.com>
> To: Janus <nxchu at foxmail.com>, gate-users
> <gate-users at lists.opengatecollaboration.org>
> Subject: Re: [Gate-users] NaN errors on some pixels of regularMatrix
> phantom in CTScanner system
> Message-ID: <DUB113-W841894178357953C80E70DE2C80 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>  
> Hi, I'm far from an expert but try to add the command :
> /gate/nameofyourregularMatrixvolume/setSkipEqualMaterials 0
> at the end of the geometry macro, after you define your volume. 
> Hope this will help..
> Tibo 
> Date: Fri, 19 Apr 2013 09:23:55 +0800
> From: nxchu at foxmail.com
> To: gate-users at lists.opengatecollaboration.org
> Subject: [Gate-users] NaN errors on some pixels of regularMatrix phantom in CTScanner system
>  
> Dear Gate users, 
>  
> I attached an DoseActor to the regularMatrix phantom on a CTScanner system. 
> The following macros show how I collect dose:
> /gate/actor/addActor DoseActor 
> mActor
>  
> /gate/actor/mActor/save 
> ./output/PhantomDose.txt
> /gate/actor/mActor/attachTo NCAT #the name of my 
> regularMatrix phantom
> /gate/actor/mActor/enableEdep false
> /gate/actor/mActor/enableUncertaintyEdep 
> false
> /gate/actor/mActor/enableSquaredEdep 
> false
> /gate/actor/mActor/enableDose true
> /gate/actor/mActor/enableUncertaintyDose 
> true
> /gate/actor/mActor/normaliseDose false
> /gate/actor/mActor/setResolution 72 88 63 #the pixel size is the 
> same with the size of regularMatrix
>  
> After the simulation (more than 10^7 events), I got the output file 
> "PhantomDose-Dose-Uncertainty.txt" that I expected. However, I found some 
> NaN value in the file. It looks like: 
>  
> 0.335632 nan 0.283809 0.277518 0.311712 0.232881 nan nan nan 
> 0.14158 nan nan nan 0.11352 0.118089 nan nan nan nan 0.117827 nan nan 0.111348 
> nan nan 0.114444 nan 0.120727 0.112061 nan nan nan nan nan nan nan nan 0.114227 
> nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan 0.112236 nan nan 
> 0.116712 nan nan nan nan nan nan 0.0982464 nan 0.695156 0.736034 0.694313 
> 0.501348 0.876738 0.593643 0.684897 
> 0.387904 0.308451 0.292645 0.307023 0.274505 0.196699 nan 0.125794 
> 0.119966 0.122969 nan 0.0921764 nan nan 0.116727 nan nan nan nan 0.121635 nan 
> nan 0.089028 nan nan nan 0.115871 0.110041 0.120644 nan nan nan nan nan nan 
> 0.113381 nan nan nan 0.115092 0.109492 nan nan nan nan nan nan nan 0.122921 nan 
> nan nan nan nan nan nan nan 0.110586 nan nan 0.103074 nan nan nan nan 1 0.712306 
> 0.555066 0.52936 0.792737 0.498393 0.627436 
>  
> Please can any expert tell me why I got these errors? 
>  
>  
> Any suggestions or comments will be sincerely appreciated.
>  
> Best regards,
>  
>  
> Janus
>  
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