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

[Park MinJae]

Dear Dimitri,

Ok...then,

Could you let me know how to generate the plot which you attached?

It looks like...sourcePosX, sourcePosY.

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

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
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On Wed, Jun 30, 2010 at 7:19 AM, DWORAK Dimitri
<dimitridworak at hotmail.com> wrote:
> That i want say, is that if they have scattering they must have some
> annihilations out of the source and they haven't, like if annihilations
> appear just in the source and not in both source and phantom.
> My phantom is a cylinder biger than the source.
>
> Thanks to help
>
> Dimitri
>
> --------------------------------------------------
> From: "Park MinJae" <MJ at JHMI.edu>
> Sent: Wednesday, June 30, 2010 1:10 PM
> To: "Dimitri DWORAK" <dimitridworak at hotmail.com>
> Cc: <gate-users at lists.opengatecollaboration.org>
> Subject: Re: [Gate-users] No annihilations in the phantom but just in the
> source
>
>> 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
>>>
>>>
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>>
>