[Gate-users] back-to-back gamma source

[Javier Ors Anía]

I had the same "problem" time ago, the thing is that if you want to use
ion source you have to add radioactive decay physics in the physics
section of your macro, with the command:

/gate/physics/addProcess RadioactiveDecay

By the way, in the online user manual (physics section) there is a
misspelling of this command, it says:

/gate/physics/addProcess RadioactiveDeACy (wrong letters in uppercase)

So it'll not work for someone that just do cut & paste.

El mié, 04-08-2010 a las 16:07 -0400, Park MinJae escribió:
> Dear Seb,
> 
> Thank you for your patch~ :)
> 
> 
> One more thing is...
> 
> Could you take a look on ion particle generation?
> 
> Positron is generating well, but nothing is come out from ion particle.
> 
> 
> 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
> //
> //  "You see, But you do not Observe"  - Sherlock Holmes -
> //=================================================
> 
> 
> 
> On Tue, Aug 3, 2010 at 7:58 AM, Seb <sebastien.jan at cea.fr> wrote:
> > Hi Eunsin,
> > Please use this new class in the folder /source/physics/src to correct this
> > bug.
> > We will provide an official patch ASAP.
> > Regards
> > Seb JAN
> >
> >> Dear Users,
> >>
> >> I simulated a cylindrical PET system using point source (back-to-back
> >> gamma) at the center of the detector for a simple study..(with cylindrical
> >> phantom filled with just air).
> >> If my understanding is correct, coincidence events should have
> >> back-to-back gamma's, which tell us LOR in r-z plane should be simply a line
> >> passing through the center (0,0). In other words Z1+Z2 should be very close
> >> to zero. Below shows actual z position detected for two gammas in each
> >> coincidence events in my simulation output. Looks like something else is
> >> going on...
> >> Can anybody tell me what's missing?
> >>
> >>            Z1                    Z2
> >>        -71.3593        46.7426
> >>        -71.5756        -50.5808
> >>        -71.5233        69.8813
> >>        -71.004         35.5772
> >>        -71.9038        15.7994
> >>        -73.7647        -4.99394
> >>        -71.5314        -11.8862
> >>        -70.284         -12.6473
> >>        -73.0036        63.4071 0
> >>        -71.3191        61.7319 0
> >>        -71.9782        -12.7522
> >>        -72.9756        -68.4205
> >>        -73.9974        39.802
> >>        -73.1717        2.25218
> >>        -71.4347        -44.9677
> >>        -71.7795        -73.2273
> >>        -70.6986        -19.3314
> >>        -73.6817        -7.85506
> >>        -73.5097        -1.3274
> >>        -70.4753        54.6905
> >>
> >> Thanks,
> >> Eunsin
> >> _______________________________________________
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> >>
> >
> >
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