Hi GGEMS staff,

In CT simulation, is there any approach to remove the secondary photons and only collect primarys? If I remove the scatter raw data, the only primary photons would be left?

Thanks,
Julien

Hi Julien,

No, in GGEMS you can't directly disable or remove secondary photons.
However, if you subtract the scatter image from the raw data, you will obtain an image containing only the primary photons.

There is another possible solution, but only if you are using a mono-energetic source: you can set very high energy cuts, close to the incident energy, which will practically keep only the primary photons.

Best regards,
Didier

Hi Didier,

Thank you so much. It is very helpful.

Thanks,
Julien