<div dir="ltr"><div>Hi,</div><div>Please keep the discussions on the mailing list. I'm not 100% sure but I think any source will work.</div><div>You can also check <a href="https://opengate.readthedocs.io/en/latest/digitizer_and_detector_modeling.html?highlight=arf#angular-response-functions-to-speed-up-planar-or-spect-simulations">ARFs</a> for speeding up your simulation.<br></div><div>Simon<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 6, 2020 at 5:13 AM Miriam Dixon <<a href="mailto:miriam.gatemc@gmail.com">miriam.gatemc@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi Simon,</div><div><br></div><div>As you responded so promptly to my question about the SPECT_FFD error I was getting a few weeks ago, I hoped you could answer a quick question I have about the use of FFD with a phase space source.<br></div><div><br></div><div>I am using GATE to run simulations of a SPECT study as a part of my Master's Thesis project. Due to my tight time constraint, I am trying as many methods to speed up my simulation as possible, without increasing the uncertainty in my results too greatly. The main technique I am using at the moment is to create phase space files to use as my source, which has drastically cut down the simulation time. I am interested in looking into other techniques (such as FFD, for example) but have been having trouble with some of the examples not working, making it difficult to then fit them to my simulation properly. One of these techniques I have had trouble with is FFD. Before I spend too much time trying to get it working, I thought I would check, will FFD work in conjunction with a phase space source? I imagine it would, but have had some problems with phase space sources behaving differently to a normal gps source before, so thought it would be safer to check!</div><div><br></div><div>Also, if you have a suggestion of a different technique to try to speed up my simulation, I would be happy to hear it.</div><div><br></div><div>Many thanks,</div><div>Miriam<br></div><div><br></div><div><br></div></div>
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