<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none"></style> </head> <body dir="ltr" style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;"> <p>Hello guys,<br> </p> <p><br> </p> <p>I am trying to use Variance Reduction Techniques in SPECT and CT simulations to speed them up.<br> </p> <p><br> </p> <p>In the CT example provided one of the simulations applies VRT, but only in the CT image file from what I can see from the output.mac file:</p> <p><br> </p> <p>"</p> <div><span style="font-size: 12pt;">/</span><span style="font-size: 12pt;">gate/output/root/enable</span><br> </div> <div>/gate/output/root/setFileName benchmarkVRTCT</div> <div>/gate/output/root/setRootHitFlag 0</div> <div>/gate/output/root/setRootSinglesFlag 0</div> <div>/gate/output/root/setRootNtupleFlag 0</div> <div>/gate/output/verbose 2</div> <div><br> </div> <div>#########</div> <div># ASCII #</div> <div>#########</div> <div>/gate/output/ascii/setOutFileVoxelFlag false</div> <div>/gate/output/ascii/setOutFileHitsFlag false</div> <div><br> </div> <div>############</div> <div># CT Image #</div> <div>############</div> <div>/gate/output/imageCT/enable</div> <div>/gate/output/imageCT/verbose 0</div> <div>/gate/output/imageCT/setFileName benchmarkVRTCT</div> <div><strong style="font-size: 14pt;">/gate/output/imageCT/vrtFactor 10</strong></div> <div><br> </div> <div>/gate/random/setEngineName MersenneTwister</div> <div>/gate/output/imageCT/setStartSeed 567489<br> </div> <p> <br> </p> <p>"<br> </p> <p><br> </p> <p>What do I need to do to use VRT for a CT simulation with a ROOT output file?<br> </p> <p><br> </p> <p>Thank you.<br> </p> <p><br> </p> <p>Cheers,<br> </p> <p><br> </p> <p>Andre<br> </p> <p><br> </p> <div id="Signature"> <div name="divtagdefaultwrapper" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:; margin:0"> <div class="BodyFragment"> <div class="PlainText" style="font-family:Calibri,Arial,Helvetica,sans-serif"><font><br> <br> <font size="2" style="font-family:Calibri,Arial,Helvetica,sans-serif">--------------------------------</font><br> <font size="2" style="font-family:Calibri,Arial,Helvetica,sans-serif">MSc Student in Biomedical and Biophysics Engineering at Faculty of Sciences of the University of Lisbon</font><br> <br> <font color="black" size="3" style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:small"><span dir="ltr" style="font-size:12pt; background-color:white"><font size="2"><span lang="en">Institute</span><span lang="en"> </span><span lang="en">of Biophysics and</span><span lang="en"> </span><span lang="en">Biomedical Engineering</span><span lang="en"><br> </span><span lang="en">Faculty</span><span lang="en"> </span><span lang="en">of Sciences, University</span><span lang="en"> </span><span lang="en">of Lisbon</span><br> Campo Grande<br> 1749-016 Lisbon<br> <br> </font></span></font><font size="2"><font style="font-family:Calibri,Arial,Helvetica,sans-serif">Room Office: 1.02</font><br> <font color="black" style="font-family:Calibri,Arial,Helvetica,sans-serif"><span dir="ltr" style="background-color:white">Extension: 20509 <br> Email: ammonteiro@fc.ul.pt</span></font></font></font></div> <div class="PlainText"><font size="2"><font color="black" style="font-family:Calibri,Arial,Helvetica,sans-serif"><span dir="ltr" style="background-color:white">LinkedIn Profile: </span></font><font color="#000000" style="text-decoration:none; line-height:21px; background-color:rgb(255,255,255)"><a tabindex="0" href="http://linkedin.com/in/andremmonteiro">http://linkedin.com/in/andremmonteiro</a></font><font color="black" style="font-family:Calibri,Arial,Helvetica,sans-serif"><span dir="ltr" style="background-color:white"><br> Website: <a tabindex="0" href="http://www.ibeb.fc.ul.pt/" target="_blank">http://www.ibeb.fc.ul.pt/</a></span></font></font><br> </div> </div> </div> </div> </body> </html>