<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt"><div><span style="font-weight: bold;">Dear GATE users,</span></div><div style="background-color: transparent;"><br></div><div style="background-color: transparent;">Hello,</div><div style="background-color: transparent;">I am simulating a pixelated-crystal SPECT system using GATE 6.2.</div><div style="background-color: transparent;">I have faced a problem in simulation of NEMA image-quality phantom regarding projection/interfile output. </div><div style="background-color: transparent;">In my output, I see that in all projection images, the counts are all located at the center of the head (or image), and not correctly distributed (or historgrammed). <span style="background-color: transparent; font-size: 10pt;">The question now is: "How can I tackle such a problem?"</span></div><div
style="background-color: transparent;"><span style="background-color: transparent; font-size: 10pt;"><br></span></div><div style="background-color: transparent;">Here are the commands used to set the digitizer parameters and acquire the projection output.</div><div style="background-color: transparent;"><br></div><div style="background-color: transparent;"><span style="background-color: transparent;"><div style="background-color: transparent;">/gate/digitizer/Singles/insert adder</div><div style="background-color: transparent;"><br></div><div style="background-color: transparent;">/gate/digitizer/Singles/insert readout</div><div style="background-color: transparent;">/gate/digitizer/Singles/readout/setDepth 2</div><div style="font-size: 10pt;"><br></div></span></div><div style="background-color: transparent;"><span style="background-color: transparent; font-size: 10pt;"><br></span></div><div style="background-color: transparent;"><span
style="background-color: transparent;"><div style="background-color: transparent;">/gate/output/projection/enable</div><div style="background-color: transparent;">/gate/output/projection/setFileName PHHiReSPECT</div><div style="background-color: transparent;">/gate/output/projection/pixelSizeX 1.0 mm</div><div style="background-color: transparent;">/gate/output/projection/pixelSizeY 1.0 mm</div><div style="background-color: transparent;">/gate/output/projection/pixelNumberX 128</div><div style="background-color: transparent;">/gate/output/projection/pixelNumberY 128</div><div style="background-color: transparent;"><br></div><div style="background-color: transparent;">/gate/output/projection/projectionPlane YZ</div></span></div><div style="background-color: transparent;"><br></div><div style="background-color: transparent;">I am looking forward to having your response,</div><div style="background-color: transparent;"><br></div><div></div><div></div><div
style="background-color: transparent;">Thank you in advance,</div><div></div><div> </div><div></div><div> </div><div><font size="2" face="arial, helvetica, sans-serif"><b>Hojjat Mahani, </b></font></div><div><font size="2" face="arial, helvetica, sans-serif">PhD Candidate of Medical Radiation Engineering</font></div><div><br></div><div><br></div></div></body></html>