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General Discussions
1

Dear CASToR user´s,
I am working on a simulated PET scanner in GATE. I set up a point source in a FOV center, and set a static PET with 10 monolithic detectors. When I perform the reconstruction, the image result appears with a star artifact. How can I solve this problem? The images are attached.

Thank you for your help in advance.

Regards,
Pedro.

pointsourcewithartifact.png
pointsourcewithartifact.png711×316 4.19 KB

2

Dear CASToR user´s,
I am working on a simulated PET scanner in GATE. I set up a point source in a FOV center, and set a static PET with 10 monolithic detectors. When I perform the reconstruction, the image result appears with a star artifact. How can I solve this problem? The images are attached.

Thank you for your help in advance.

Regards,
Pedro.

pointsourcewithartifact.png
pointsourcewithartifact.png711×316 4.19 KB

3

Hi Pedro,

Could you share some related part of your GATE macro of this simulation? I don’t think the issue is with castor, so more details will make us easier to help you.

Best,

4

Hi,

Have you thought about the spatial resolution capacities of a PET scanner with only 10 detectors? It might be too coarse to resolve a point source, depending on the size of the detectors etc.

Best

Marina Filipovic