[Gate-users] Dose Collection Problems with Voxelized Phantom; Gate V6.1

[Yann PERROT]

Dear Matthew,

Just a suggestion...
The best way to score dose distributions, uncertainties or many other 
quantities is to use a DoseActor attached to your volume of interest.
In this case you have to create your volume of interest from an Analyze 
image.

Bests,

Yann


Le 04/05/2012 02:50, Matthew Belley a écrit :
> Dear Gate Users,
>
> I am encountering two problems with dose collection for a voxel phantom:
>
> 1. When I use the "parameterizedBoxMatrix" or the "regularMatrix"
>    commands (following "/gate/world/daughters/insert") the binary
>    data-set that I get is very sparse - only a handful of pixels are
>    non-zero.  However, I am able to get a good dose measurement when I
>    use the "compressedMatrix"  command (following
>    "/gate/world/daughters/insert").  Why do the other two commands
>    ("parameterizedBoxMatrix" or the "regularMatrix") not give similar
>    results?  I am running all simulations with the same number of
>    particles.
> 2. When I use the "compressedMatrix"  command I am not able to get the
>    uncertainty data file even when I use the command
>    "/gate/output/doseOutput/saveUncertainty true".  However, if I use
>    "parameterizedBoxMatrix" command, I do get the uncertainty data file
>    (but it is sparse and almost all zeros for similar reasons explained
>    in question 1).  How can I enable the uncertainty data file for the
>    "compressedMatrix" command?
>
> Any suggestions/solutions/comments for how to resolve these two 
> problems would be appreciated!
>
> Best Regards,
>