[Gate-users] Alternative usage of voxelized geometry

[sacolas57 at aol.com]

 Hello all,

I would like to insert a CT image for radiotherapie as it's specified in the user's guide : 
Another way to use 3D images is available in GATE. To insert an image you may use the following commands:

/gate/world/daughters/name                      patient
/gate/world/daughters/insert                    ImageNestedParametrisedVolume
/gate/patient/geometry/SetImage                 data/myImage.hdr
/gate/geometry/setMaterialDatabase              data/myFiles.db
/gate/patient/geometry/SetHUToMaterialFile      data/myFiles.txt

I have generated the files .db and .txt with using the following commands : 

To generate a correspondence between HU (voxel values) and material, you may use the following commands:

/gate/HounsfieldMaterialGenerator/SetMaterialTable                  data/Schneider2000MaterialsTable.txt 
/gate/HounsfieldMaterialGenerator/SetDensityTable                   data/mySchneider2000DensitiesTable.txt
/gate/HounsfieldMaterialGenerator/SetDensityTolerance               0.1 g/cm3
/gate/HounsfieldMaterialGenerator/SetOutputMaterialDatabaseFilename data/myFiles.db
/gate/HounsfieldMaterialGenerator/SetOutputHUMaterialFilename       data/myFile.txt
/gate/HounsfieldMaterialGenerator/Generate

Moreover I've check up that the format of my image was well in "analyze" (I hope this is the right format).
However, when I run GATE, I've got this kind of error : 

[Core-0] Initialization of geometry
src/GateHounsfieldMaterialTable.cc (l.125): Current H1=-1050 is different from previous H2=-950. Abort.

It's seems this error comes from to "myfile.txt" but I don't understand why.

Have you got any idea to solve this problem ?

Thanks.

Best regards,

Nicolas SAS


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