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<p><span style="font-family: times new roman, times, serif; font-size: 12pt;">Hi dear users</span><br /><span style="font-family: times new roman, times, serif; font-size: 12pt;">I want to get the scatter fraction and true and random rate so that I can calculate parameter NECR.</span><br /><span style="font-family: times new roman, times, serif; font-size: 12pt;">I putted the phantom similar to the NEMA.</span><br /><span style="font-family: times new roman, times, serif; font-size: 12pt;">for example When I want to calculated NECR for 10 kBq/ml, the true rate is much lower than the random rate.</span><br /><span style="font-family: times new roman, times, serif; font-size: 12pt;">Is this normal or is there something wrong with my simulation?</span></p>
<p><span style="font-family: times new roman, times, serif; font-size: 12pt;">Thanks in advance for any answers.</span></p>
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