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Hi Lorena,
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<div class="">The cuts correspond to a threshold on the production of secondary particles by the specified particle in the specified volume.</div>
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<div class="">For example, if you set electron cut to 1 cm in the phantom, it means that if an electron's current energy causes it to have a range (I think it might be the CSDA range or something similar) smaller than 1 cm in the phantom (i.e. it will come
to a complete stop within 1 cm of its current position), then it will stop producing secondary particles (such as bremsstrahlung photons, for example).</div>
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<div class="">What value should you use? It depends on your application. For example, if you are doing PET studies, you probably don’t care about the electrons in the phantom. So, to save time on your simulation, you could have a higher cut in your phantom.
On the other hand, you probably want a small cut in your LSO since you’re interested in simulating the cascade that leads to scintillation light in your crystal.</div>
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<div class="">So… there are no hard rules. In doubt, run two simulations with different values of the cuts and compare the results (simulation time and actual results). </div>
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<div class="">Cheers,<br class="">
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<div class="">Marc</div>
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<div class="">__________________________</div>
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<div class="">Marc Chamberland, MSc</div>
PhD candidate<br class="">
Department of Physics<br class="">
Carleton University<br class="">
Ottawa (ON)</div>
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<div class="">On Feb 4, 2015, at 13:16, LORENA VAZQUEZ CANELAS <<a href="mailto:lorena.vazquez@usal.es" class="">lorena.vazquez@usal.es</a>> wrote:</div>
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<div dir="ltr" class=""><span class="">Hello!<br class="">
I'm a Gate newer
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and</div>
I'm doing simulation of Siemens Biograph TruePoint
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PET/CT, but I don't k
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now</div>
how to set SetCutInRegion in
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LSO and </div>
</span><span class="">Phantom?<br class="">
1cm or 1 mm or other else ? <br class="">
Is there some rules to set this value when do
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other PET simulations?<br class="">
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Thank you so much!</div>
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<pre class="">LORENA VÁZQUEZ CANELAS<br class="">-- <br class="">LRI - Datación (Despacho Técnicos)<br class="">Calle Espejo, s/n, 37008 - Salamanca (Spain)<br class="">TEL: +34 923 294930 ext:4932 email: <a href="mailto:lorena.vazquez@usal.es" target="_blank" class="">lorena.vazquez@usal.es</a><br class="">web: <a href="http://campus.usal.es/%7Elri/" target="_blank" class="">http://campus.usal.es/~lri/</a></pre>
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