<div dir="ltr"><div class="gmail_default" style="color:rgb(11,83,148)"><div class="gmail_default" style="font-size:12.8px">Dear Gate-users,</div><div class="gmail_default" style="font-size:12.8px"><br></div><div class="gmail_default" style="font-size:12.8px">The GATE manual talks about a helper keyword who defines the spectrum of F-18 named "Fluor18" and a helper keyword named "back-to-back" who simulate two annihilation photons. </div><div class="gmail_default" style="font-size:12.8px">Someone knows if I put the helper keyword "Fluor18" in my macro job I need to set the "back-to-back" source or if just with the "Fluor18" keyword I have the positrons and 2 gammas emitted like the decay of F-18?</div><div class="gmail_default" style="font-size:12.8px"><br></div><div class="gmail_default" style="font-size:12.8px">Another question: I'm simulating dose in a virtual anthropomorphic phantom. I want to simulate the realistic decay of F-18. If the helper Keyword "Fluor18" and "back-to-back" are necessary for a realistic simulation of a F-18 source, someone knows if I need to set the interfile reader two times and named like two different sources: one for "Fluor18" and another for "back-to-back" source?</div><div class="gmail_default" style="font-size:12.8px"><br></div><div class="gmail_default" style="font-size:12.8px">Thanks in advance, </div><div class="gmail_default" style="font-size:12.8px"><br></div></div><div><div class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:12.8px"><font color="#3d85c6"><b style="font-size:small">Caroline Dartora</b><br></font></div><div style="font-size:12.8px"><div style="font-size:small"><div dir="ltr"><span style="color:rgb(111,168,220)">Physicist - BSc in Medical Physics</span><br></div><div style="font-size:12.8px"><div style="font-size:small"><font color="#6fa8dc">Electrical Engineering Master Student</font></div></div><div dir="ltr"><font color="#6fa8dc">Porto Alegre, RS, Brazil</font></div><div dir="ltr"><div><br></div></div></div></div></div></div></div></div></div></div>
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