[Gate-users] Couldn't figure out the organization of sinogram data (288, 288, 1024)

[Arda Konik]

Hi,

Could anyone explain the organization of sinogram output from  "  
PET_Ecat_System.mac " example, please?
A 32 ring system generates 1024 2D sinograms, and they must be indexed  
by ring difference ( Ri - Rj) and axial position (Ri + Rj)/2 according  
to the info file and the Gate manual. However, i couldn't even figure  
out which ones are direct sinograms ( Ri - Rj =0) out of these 1024  
sinograms.

I tried to understand the organization by simulating the acquisition  
from sources at different locations and shapes; decreasing ring number  
but still couldn't solve this except that i can see a pattern due to  
ring difference indexing, when i plot the total counts of the  
sinograms...What other approach would you recommend to figure out the  
data organization?

Thanks,
arda konik
University of Iowa
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