[Gate-users] Re: [Gate-devel] full decay scheme vs pure emission

[Sebastien JAN]

Hi,

> I came to the conclusion that when we replaced the F-18 positron 
> source with a gamma back-to-back source we achieved a gain factor of 
> 1.25 or speed up the simulation by 20%.


I obtained the same difference (~ 20%) with the following configuration 
: Zubal-like phantom : high "granularity"()256x256x128) for emission 
map, low "granularity " for attenuation (32x32x16) and 2 materials for 
brain description (bone and "brain" tissu).

Cheers
Seb