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<p class="MsoNormal">I have 2 questions.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">When opening the energy spectrum of Tc99m using root, is there a way to get more data points to get a smooth curve, and not a step curve.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Back when I started to learn how to simulate a gamma camera, I tried using the SPECT example on gatecontrib. No matter how much I increased the activity and increased the step time,
 I never got anything when analysing the root file. I suspected there were no photons reaching the crystal, so I removed the shielding and then I started to get results. Is there a problem with the SPECT example that I’m not getting any information? Should
 the shielding be the same size as the SPECTHEAD?<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Adolf  <o:p></o:p></p>
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