[Gate-users] No annihilations in the phantom but just in the source

[Park MinJae]

Dear Dimitri,

You want to see...
Scattering of the positron before its annihilation.

I am not sure there is information about scattering of the positron in
the result file.


Anyway, I just want to make sure...
Do you use bigger phantom than source?

The plot, which you attached, is like...you use the same size as the source.

Cordially yours,
MJ

//=================================================
//  Ph.D. Park MinJae
//
//  Johns Hopkins University
//  School of Medicine, Dept of Radiology
//  Division of Medical Imaging Physics
//
//  DialTo:+1-410-955-2684 (Office)
//  MailTo:MJ at ToTi.us, MJ at JHMI.edu
//
//  Self-discipline to the Right...
//=================================================



On Wed, Jun 30, 2010 at 4:59 AM, Dimitri DWORAK
<dimitridworak at hotmail.com> wrote:
>
> Hi
>
> I have simulated a spherical source  of F18 with a radius of 0.5mm in a Phantom of Plexiglas but when i plot all
> positions of annihilation between positrons and electrons giving by the Singles file i see that all annihilations are
> in the source (graph is attach to the mail ) they are no scattering of positrons in the phantom.
>
> I have check my physic list and the Multiplescattering  option for e+ and e- is in it.
>
> Could you help me please?
>
> DWORAK Dimitri
>
>
> _________________________________________________________________
> Hotmail : Simple et Efficace qui vous facilite la vie… Découvrez la NOW génération !
> http://www.windowslive.fr/hotmail/nowgeneration/
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users
>