[gate-users] voxelised attenuation geometries ?

[Graeme O'Keefe]

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
> _______________________________________________
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> gate-users at lphe1pet1.epfl.ch
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