[Gate-users] Voxellized phantom problem?

[Sonal Ambwani]

Hello Wei and Susana,

I have a question about voxelized phantoms. With visualization turned 
on, do you see the voxellized hoffman phantom during the simulation 
like one sees the cylindrical phantom? I dont, and I was just wondering.


Thanks,
Sonal
Quoting Susana Branco Silva <susana.silva at fc.ul.pt>:

> Hello wei!
>
>
> I?m using the MOBY phantom too!
>
>
>
> You have to be care with one thing: GATE can?t read float data (32 
> bit)! So you'll need to convert your phantom file to unsigned 
> interger (16 bit) format (with IDL or MATLAB for instance).
>
>
>
> Just do the data conversion and follow the hoffman brain example 
> inside the GATE distribution!!
>
> Careful: check you image conversion before launch your simulation? If 
> all scripts are well defined and you got the message above, probably 
> is because the conversion wasn't done correctly:
>
>
>
> GateSourceVoxelImageReader::ReadFile : fileName: moby.h33
>
>  Header read from           'moby.h33'
>
>  Data file name                'moby.i33'
>
>  Nb of planes:                  122
>
>  Nb of pixels per plane:   40 40
>
>  Pixel size:                       5.000e-01 5.000e-01
>
>  Slice thickness:              5.000e-01
>
>  Matrix size:            2.000e+01 2.000e+01
>
>  Data type:              UNSIGNED INTEGER
>
>
>
>  Ignoring confine condition
>
> Source ---------------> voxel_mouse
>
>   ID                         : 0
>
>   type                      : backtoback
>
>   startTime (s)         : 0.000e+00
>
>   time (s)                  : 0.000e+00
>
>   forcedUnstable      : 1
>
>   forcedLifetime (s)  : 9.502e+03
>
>   verboseLevel           : 0
>
> -----------------------
>
>
>
> Voxel reader ---------->   number of voxels       : 0
>
> total activity (Bq)    : 0.000e+00
>
>
>
>
>
> Hope this help you.
>
>
>
> Cheers,
>
>
>
> Susana Branco Silva
>
>
>
> untitled
>
> Faculdade de Ciências da Universidade de Lisboa
>
> Campo Grande, 1749-016 Lisboa, Portugal
> Phone: (+351) 21 750 01 77 ext.: 20515
> Fax:  (+351) 21 750 00 30
>
>  <mailto:susana.silva at fc.ul.pt> email: susana.silva at fc.ul.pt
>
> url: www.ibeb.fc.ul.pt
>
>
>
>
>
> -----Original Message-----
> From: gate-users-bounces at lists.healthgrid.org 
> [mailto:gate-users-bounces at lists.healthgrid.org] On Behalf Of wqy
> Sent: segunda-feira, 19 de Maio de 2008 16:33
> To: gate-users at lists.healthgrid.org
> Subject: [Gate-users] Voxellized phantom problem?
>
>
>
> Hello Gate User,
>
>
>
>           I have used Gate to simulate  the Moby Phantom and encountered
>
> an error.The following is the error which Gate output:
>
> "...
>
> ...
>
> 'nrecognised type name 'short float
>
> 'nrecognised type name 'short float
>
>  Header read from       'm007-heart_act_1.h33'
>
> 'Data file name         'm007-heart_act_1.i33
>
>  Nb of planes:           0
>
>  Nb of pixels per plane: 256 256
>
>  Pixel size:             1 1
>
>  Slice thickness:        0
>
>  Matrix size:            256 256
>
>  Data type:
>
>
>
>
>
> Error: one of the matrix dimensions is zero!
>
> ERROR - G4Box()::G4Box(): hof_brain_S
>
>         Dimensions too small ! - 0, 0, 0
>
>
>
> *** G4Exception : InvalidSetup
>
>       issued by : G4Box::G4Box()
>
> Invalid dimensions. Too small.
>
> *** Fatal Exception *** core dump ***
>
>  "
>
>
>
> By the way:      1.the interfile is correct, it can be read by xmedcon
>
> exactly.
>
>                           2. the Gate is installed correctly, it can be
>
> simulated the example Voxellized phantom (hof3.h33,hof3.i33)
>
>
>
> I have no idea how to dealwith  the problem. Could someone help me?
>
> Best regards and thanks!
>
>
>
>
>
> wei
>
> Dept. of Engineering Physics
>
> Tsinghua University
>
>
>
>
>
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>
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>
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>
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>
>



Sonal Ambwani

Dept. of Electrical and Computer Engineering
Boston University