[gate-users] voxelized phantom

[Mutanga Theodore]

Greetings

I am also interested in voxelized phantoms and source, I have CT slices of
the NEMA phantom and I am not sure what to use to segment the various
areas and assign different values which can be correlated to activities.
Does anyone have any ideas how to do that ? Maybe Richard ..?

Cheers

> Hi Uday,
>
> I suggest you use the paramaterizedBoxMatrix instead.  This type of
> voxellized phantom is available in the most recent release of GATE and
> better supported by GEANT.  In order to use it, you need to change two
> things (hilighted in blue) in your script:
>
>         /gate/world/daughters/name ncat
>> /gate/world/daughters/insert parameterizedBoxMatrix
>> /gate/ncat/geometry/insertReader image
>> /gate/ncat/imageReader/insertTranslator range
>> /gate/ncat/imageReader/rangeTranslator/readTable range.dat
>> /gate/ncat/imageReader/rangeTranslator/describe 1
>> /gate/ncat/imageReader/readFile myo_atn.dat
>> /gate/ncat/attachVoxelPhantomSD
>
> Good luck,
> Richard
>
> On 10/7/05 11:12 AM, "Uday Tipnis" <ujt at ufl.edu> wrote:
>
>>
>> Hi,
>>
>> I'm trying to use a voxelized phantom in Gate and am experiencing some
>> problems. Following is the macro I use to define the phantom:
>>
>> /gate/world/daughters/name ncat
>> /gate/world/daughters/insert replicaMatrix
>> /gate/ncat/geometry/insertReader image
>> /gate/ncat/imageReader/insertTranslator range
>> /gate/ncat/imageReader/rangeTranslator/readTable range.dat
>> /gate/ncat/imageReader/rangeTranslator/describe 1
>> /gate/ncat/imageReader/readFile myo_atn.dat
>> /gate/ncat/attachPhantomSD
>>
>> I'm simulating a cylindricalPET system and all commands are accepted and
>> no warnings/errors are issued as Gate runs. But "gateCoincidences.dat"
>> remains empty. If I comment out the above macro, I get coincidences as
>> expected. I have added some new materials to the "GateMaterials.db" file
>> but they are accepted by Gate and don't seem to be a problem. Anyone who
>> has used a voxelized phantom successfully, please help.
>>
>> Thanks in advance,
>>
>> Uday
>>
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>> gate-users at lphe1pet1.epfl.ch
>> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>
>
> --
> Richard Taschereau, Ph.D.
> CRUMP Institute for Molecular Imaging
> University of California Los Angeles
> 700 Westwood Plaza A438
> Los Angeles, CA 90095-1770
> Phone: (310) 794-1839
> Fax:     (310) 206-8975
> email: RTaschereau at mednet.ucla.edu
>
>
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