[Gate-users] Progression of an ongoing simulation

[David Sarrut]

Hello Matthieu,

- use the option saveEveryNSeconds of some actor to allow dump results at
regular interval, like : '/gate/actor/mydoseactor/saveEveryNSeconds     60'

- no way to stop at a given uncertainty. A good strategy : perform 3 or 4
simulations with low and increasing nb of particles. For each, compute
uncertainty in the region you are interested in. Plot and fit a 1/sqrt(n)
curve. Look the n you need to reach your desired uncertainty. Relauch
simulation with n.

- for activity mode, you can add a simple SimulationStatisticActor to get
some useful information at regular time interval
/gate/actor/addActor               SimulationStatisticActor stat
/gate/actor/stat/save              output/stat.txt
/gate/actor/stat/saveEveryNSeconds 60

David




On Wed, Apr 1, 2015 at 3:32 PM, Matthieu Dondey <m.dondey at gmail.com> wrote:

> ​Dear Gaters,
>
> Maybe it's a silly question, or it has already been answered but I'm
> running long simulations and I can't find any clues about the progression
> of an ongoing simulation.
>
> Does someone have a trick to get this information ? maybe in % relatively
> to  the TotalNumberOfPrimaries ?
>
> I've tried using the verbose commands, and the /gate/verbose Beam command
> gives output of every generated particle ... but flooding the console with
> outputs doesn't help with the simulation time :/
>
> I've read in *"A review of the use and potential of the GATE Monte Carlo
> simulation code for radiation therapy and dosimetry applications" by David
> Sarrut* a table with time and number of particles needed to get a fixed
> uncertainty (2% in this table).
>
> For cases where the source isn't defined with TotalNumberOfPrimaries, but
> in activity mode, I'd also be happy to know how to get this type of
> information (time and number of particles needed to get a fixed
> uncertainty) if anyone has a simple way to get it :)
>
> Thanks in advance
>
> Matthieu
>
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>



-- 
David Sarrut, Phd
Directeur de recherche CNRS
CREATIS, UMR CNRS 5220, Inserm U 1044
Centre de lutte contre le cancer Léon Bérard
28 rue Laënnec, 69373 Lyon cedex 08
Tel : 04 78 78 51 51 / 06 74 72 05 42
http://www.creatis.insa-lyon.fr/~dsarrut
_________________________________
 "2 + 2 = 5,  for extremely large values of 2"
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