[Gate-users] Simulation time for CT

[Chaitanya Kolluru]

Would a multi-threaded approach help? How do I get the application to use
all the processor cores on my system?

Thanks,
Chaitanya.


On Wed, Dec 18, 2013 at 7:37 PM, Chaitanya Kolluru <
kolluru.chaitanya at gmail.com> wrote:

> Dear Gate users,
>
> I'm trying to simulate a CT system using vGATE. I'm using the sample code
> found in examples/examples_CT/classic folder to do the same.
>
> For me, the simulation time is a concern. I have reduced the acquisition
> time from 90 seconds per projection to 9 seconds. The image quality has
> degraded considerably with this switch. The simulation now takes about two
> minutes per projection compared to half an hour previously.
>
> I'm simultaneously monitoring my system usage during the run. Even though
> I've alloted 24 GB memory for the virtual system, the system usage never
> goes beyond 3 GB.
>
> Are there any tips to get a better simulation time and better image
> quality? Also, what do these numbers mean?
>
> User Simulation time (sec) := 194.31 sec
> Real Simulation time (sec) := 209.93 sec
> System Simulation time (sec) := 2.88 sec
>
> Thank you,
> Chaitanya.
>
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