[Gate-users] Physic List SPECT system

[maxime]

Hi Marta,

here in the documentation you can find the different physics lists, and you are right it is recommend to use physics builder.
https://opengate.readthedocs.io/en/latest/setting_up_the_physics.html <https://opengate.readthedocs.io/en/latest/setting_up_the_physics.html>

If you need high precision for all the processes, for example for dosimetry applications, it is recommended to use either emlivermore or emstandard_opt4:
/gate/physics/addPhysicsList emlivermore
or
/gate/physics/addPhysicsList emstandard_opt4
But…

When simulating SPECT, you may only be interested in photons (X-ray, gammas) reaching your detector 
so you may want to have only processes related to photons in your physics list. 
This is possible ONLY if you build your own physics list with macro commands such as (not the addPhysicsList) :
/gate/physics/addProcess [Process] [Particle]
Your SPECT simulation will be faster that way but you should be really careful to not forget something that might impact the result. 
I only recommend this to advanced users.

I hope it helps.

Best regards,
  Maxime Chauvin

> On 24 Apr 2020, at 00:56, Marta Coelho <martinhaonline109 at gmail.com> wrote:
> 
> Hi GATE users,
> 
> I installed the VGATE 8.2 platform. and I have doubts about the physical part of the script to simulate the SPECTHead system.
> The manual says "Up to now, physic lists were set in GATE according to macro files containing list of command to add physical processes. From GATE Version 7.0, we highly recommend to switch to the" physic list builder "mechanism. The physic-list builders are provided by the Geant4 community. To use a builder, use the “addPhyslicsList”.
> My question is: What is the best physics lists for simulating a SPECT system? 
> 
> Thank you for your attention and I look forward to an answer.
> _______________________________________________
> Gate-users mailing list
> Gate-users at lists.opengatecollaboration.org
> http://lists.opengatecollaboration.org/mailman/listinfo/gate-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20200424/0f48f2c2/attachment.html>