Hi there,
First of all, thank you so much for developing this toolbox. It is an incredibly valuable tool for the community!
I am currently trying to use the toolbox and SIMIND to perform Ac-225 440 keV SPECT PSF modeling. Following your methodology, I am simulating point source scanning at different source-detector distances and planning to fit it using the 1D operator
However, I have run into an issue at the very first stage regarding the raw Monte Carlo simulation outputs. When I run the simulation using the parameters provided in the tutorial, my raw projection images are significantly noisier than the clean reference files (.h00/.a00 files in the datalarger folder) provided in your tutorial repository.
Your simulations:
My simulations:
Some simulation Details:
Tutorial Version: SIMIND V7.0.3 (Intel Win)
My Version: SIMIND V8.0 (Intel Linux)
Photons: 2,000,000,000 (/26:2000)
Detector Hits: Both your and my .res logs at the same distance show roughly same # of hits.
Despite the .res logs showing statistically identical runs, directly visualizing my raw output file versus the tutorial's raw output file reveals a stark difference in the noise levels. Could you please offer us some advice on this?
Thank you again for your time and for this excellent toolbox!
Rick
Hi there,
First of all, thank you so much for developing this toolbox. It is an incredibly valuable tool for the community!
I am currently trying to use the toolbox and SIMIND to perform Ac-225 440 keV SPECT PSF modeling. Following your methodology, I am simulating point source scanning at different source-detector distances and planning to fit it using the 1D operator
However, I have run into an issue at the very first stage regarding the raw Monte Carlo simulation outputs. When I run the simulation using the parameters provided in the tutorial, my raw projection images are significantly noisier than the clean reference files (.h00/.a00 files in the datalarger folder) provided in your tutorial repository.
Your simulations:
My simulations:
Some simulation Details:
Tutorial Version: SIMIND V7.0.3 (Intel Win)
My Version: SIMIND V8.0 (Intel Linux)
Photons: 2,000,000,000 (/26:2000)
Detector Hits: Both your and my .res logs at the same distance show roughly same # of hits.
Despite the .res logs showing statistically identical runs, directly visualizing my raw output file versus the tutorial's raw output file reveals a stark difference in the noise levels. Could you please offer us some advice on this?
Thank you again for your time and for this excellent toolbox!
Rick