[Castor-users] GATE ecat reconsstruction

[Dimitrios Thanasas]

Dear CASTOR-users,

I simulate a simple PET ECAT system using GATE (V8.2 - I couldn't install
CASTOR on version 9 or later).
I simulated an orthogonal parallelepiped source (xlength:5 mm, ylength:1
mm, zlength:10 mm).
According to the guidelines, I have used castor-GATEMacToGeom to generate
the geom file and castor-GATERootToCastor to create the Cdh and Cdf files.
Then I ran the command
castor-recon -df ecat_df.Cdh -opti MLEM -it 64:128 -dim 64.,64.,64. -vox
1.,1.,1. -dout myimages1
after the termination of the reconstruction I get the attached image.

I see something like circles in transverse1 plane instead of a orthogonal
plane as I am expected. In coronal1 and sagital1 planes look like a slice
to appear as I am expected but I think the images have few points. My GATE
output root file includes 862000 coincidences.
Is there something wrong with the reconstruction?

Any help will be appreciated,
Best regards,
Dimitris
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