[gate-users] voxelized phantom color attributes

[Richard Taschereau]

Hi guys,

The meaning of the ³a b c d parameters² are:  red, green, blue, alpha.  They
are values between 0 and 1.  Alpha controls transparency (0-transparent,
1-opaque) and is supported only by some viewers. G4RayTracer is one of them..

Richard

On 2/7/06 1:52 AM, "Graeme O'Keefe" <graeme.okeefe at petnm.unimelb.edu.au>
wrote:

> The voxelised "phantom" uses range.dat.
> 
> for example: 
> % cat 
> gate_v2.2.0/examples/example_PHAMTOM_SOURCE/Voxelized_Phantom_Source/range.dat
>   5
>   0      0       Air        false 0.0  0.0  0.0  0.2
>   6      6       Lung       false 1.0  0.0  0.0  0.2
>   6      16      Breast     false 0.0  1.0  0.0  0.2
>   16     36      Plastic    true  0.0  0.0  1.0  0.2
>   36     200     Air        false 0.0  0.0  0.0  0.2
> 
> 5 classes
> lld  uld  material flag a b c d
> 
> The 'material' voxels are those for which lld < voxels < uld  where the
> "material" is defined in GateMaterials.db
> 
> The flag indicates whether to display the phantom when visualising the
> 'a,b,c,d' parameters are related to the colour/line-style/line-width etc. to
> display the material. I don't have the exact details for that right now.
> 
> You can see the list of materials available (and add your own) in:
> 
> gate_v2.2.0/GateMaterials.db
> 
> regards,
> 
> 
> Graeme
> 
> On 07/02/2006, at 8:17 AM, Dale Bailey wrote:
> 
>>  
>> The GATE documentation states the following under the "Voxelised Source"
>> section (under fig 7.1)
>>  
>>  
>>  
>> " GATE also offers the possibility to read in voxelised attenuation
>> geometries following these two strategies. The gray scale is then converted
>> to material definitions in that case using an analogous translator. "
>>  
>>  
>>  
>> Is there any documentation available on how to do this? Is there a file like
>> "activityRange.dat" that contains the attenuation coefficients required?
>>  
>>  
>>  
>> Thanks,
>>  
>>  
>>  
>> Dale
>>  
>>  
>>  
>> Dale L Bailey PhD CSci ARCP(Lond) FIPEM MACPSEM
>> Principal Physicist, Department of Nuclear Medicine, Royal North Shore
>> Hospital
>> Senior Lecturer in Physics, School of Medical Radiation Sciences
>> and
>> Clinical Associate Professor, Faculty of Medicine
>> University of Sydney
>> phone: +61 (0)402 892 051
>> FAX:   +61 (0)2 9906 1124
>> email: D.Bailey at fhs.usyd.edu.au <mailto:D.Bailey at fhs.usyd.edu.au>
>> _______________________________________________
>> gate-users mailing list
>> gate-users at lphe1pet1.epfl.ch
>> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>>  
> 
>  
> 
> 
> 
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> 


-- 
Richard Taschereau, Ph.D.
CRUMP Institute for Molecular Imaging
University of California Los Angeles
700 Westwood Plaza A222
Los Angeles, CA 90095-1770
Phone: (310) 825-0697
Fax:     (310) 206-8975
email: RTaschereau at mednet.ucla.edu



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