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

[Park MinJae]

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
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//  MailTo:MJ at ToTi.us, MJ at JHMI.edu
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//  "You see, But you do not Observe"  - Sherlock Holmes -
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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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