[Gate-users] Voxelized Phantom Defined in Gate v.6.2

[Auranuch Lorsakul]

Hi Gate Users,

With Gate v.6.2, I have a voxelized XCAT phantom uint 16 for a CT simulation, but I got an error message shown below.

"GateGeometryVoxelInterfileReader::ReadFile: WARNING: voxel not added (material translation not found); value 43520."

This phantom works fine with Gate 6.1 on the PET simulation.

However, I could reproduce a problem by simply generating a two-value phantom and a table. I found out that it is because there is a index value in the phantom is not defined in the table.

Regarding the error message shown above, I don't have the index value = 43520 in the phantom anymore (all index values in the phantom are less than 1000). I think it might be something wrong with the data type or data byte order. As the header file and the output log shown below, the data byte order is "Bigendian."

I am wondering how to define the phantom correctly in Gate 6.2. Is there anything changed/upgraded for defining the phantom?


!INTERFILE :=

!name of data file := IMG_LESION_1.dat

!matrix size [1] := 512
!matrix size [2] := 242
!number format := unsigned integer
scaling factor (mm/pixel) [1] := 1.030
scaling factor (mm/pixel) [2] := 1.030
!number of slices := 231
slice thickness (pixels) := +0.687
ce thickness (pixels) := +0.687


OUTPUT LOG:
---------------------------
 Header read from       'Xcat_header.h33'
 Data file name         'IMG_LESION_1.dat'
 Nb of planes:           231
 Nb of pixels per plane: 512 242
 Pixel size:             1.03 1.03
 Slice thickness:        0.687
 Matrix size:            527.36 249.26
 Data type:              UNSIGNED INTEGER
 Data byte order:	 BIGENDIAN

Thanks,
Ney