[Gate-users] How do you synchronize a moving detector (SPECT) with a source (Proton Beam)?

[David Boersma]

Hi Kurt,

As far as I know the time dependence / motion functionality not yet 
supported for proton therapy applications in GATE.

I myself am studying the effect of patient motion on dose distributions 
in pencil beam scanning proton therapy. I have been brooding about ways 
to extend the source and treatment plan descriptions in GATE to have a 
time variable, but it seemed excessive to do deep surgery in the code 
just for my use case. I worked around it by subdividing the simulation 
in time slices, grouping time slices with identical geometry, simulating 
those groups separately, and then recombining the results afterwards. 
That was good enough for a prototype of our study.

Proton therapy combined with time dependent imaging is a very 
interesting use case. Are you simulating with a single pencil beam or 
with the TPSPencilBeam actor?

David B.



Den 11/09/2017 kl. 18:52, skrev Kurt V:
> How do you synchronize a moving detector (SPECT) with a source (Proton 
> Beam)?
> 
> I’m creating a simulation using a proton beam and a SPECT moving 
> detector system.
> 
> When I run the simulation, the SPECT detector moves for the correct 
> amount of time and then stops.
> 
> Then the proton beam starts after the SPECT system has stopped moving.
> 
> Then the particle tracks are displayed after these two systems have 
> already run.
> 
> Does anyone know how to synchronize these systems to run at the same time??
> 
> (Visualizing with OGLSX).
> 
> Thank you very much,
> 
> Kurt W. Van Delinder
> 
> 
> 
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