[Castor-users] Merging PET attenuation and sensitivity map for the reconstruction

[jbaran]

Dear Castor Users,

I am trying to reconstruct the PET data with Castor. To be more precise, 
what I am trying to do is to reconstruct the data with provided 
separately attenuation and sensitivity maps. What was suggest to me is 
that Castor need those map merged together and used as one input. The 
solution for doing that (as suggested by Castor developers) is to 
produce high statistics list mode covers whole FOV (what we did) and 
then using obtained list mode, attenuation maps and -opti SENS option in 
castor-recon app (without sensitivity map) produce merged 
attenuation+sensitivity map which will be then used in the final 
reconstruction. However, the computing demands for handling that are 
huge and overcome a little bit our computing capabilities.

I am wondering what other options do I have. Idealistically, I would 
like to know if it is possible to merge both maps without the list-mode 
data or give both them as an input to Castor in one castor-recon 
command. Is there any external software or anyone of you developed 
software to do that externally?

I would appreciate any help with that matter.

All the best,
Jakub