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<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Hi Arda,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>According to your output, you have:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>>> entering [GateToSinogram::RecordEndOfRun]<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Number of prompt coincidences for all ring
combinations       276<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Â Â Number of true coincidences for all ring
combinations         276<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Â Â Â Â Number of scattered coincidences for all ring
combinations    113<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Â Â Number of random coincidences for all ring
combinations       0<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Number of delayed coincidences for all ring
combinations      0<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â sinograms 1,1,1,0,0 written to the raw file
yourSinogram_1.ima<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â sinograms 1,1,1,1,0 written to the raw file
yourSinogram_1_del.ima<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â sinograms 1,1,1,4,0 written to the raw file
yourSinogram_1_sct.ima<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â >> leaving [GateToSinogram::RecordEndOfRun]<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>You should then have 276 events in yourSinogram_1.ima;
113 events in <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>yourSinogram_1_sct.ima and 0 events in yourSinogram_1_del.ima.
As a consequence, the majority of the sinogram bins are set to zero! According
to your geometry:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Number of crystals per crystal rings: 576<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Number of crystal rings:Â Â Â Â Â Â Â Â Â Â Â Â Â 32<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Number of radial sinogram bins:Â Â Â 288<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Number of azimuthal sinogram bins: 288<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>You have 288*288*32*32 = 84934656 bins per sinograms. At
best, 3e-6 of them are non-zero. So, when you visualize your sinograms, it is
very likely that you only see zeroes. <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>The difference between the sinograms is explained in
your output!<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Prompt coincidences are recorded in data = 0<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â Delayed coincidences (if simulated) are recorded
in data = 1<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â True scattered coincidences (eventID1 = eventID2)
are recorded in data = 4<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â sinograms 1,1,1,0,0 written to the raw file
yourSinogram_1.ima<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â sinograms 1,1,1,1,0 written to the raw file
yourSinogram_1_del.ima<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Â Â sinograms 1,1,1,4,0 written to the raw file
yourSinogram_1_sct.ima<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>So, yourSinogram_1.ima for prompts, yourSinogram_1_del.ima
for delayeds, and yourSinogram_1_sct.ima for scatters.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Claude<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>-----Message d'origine-----<br>
De : gate-users-bounces@lists.healthgrid.org
[mailto:gate-users-bounces@lists.healthgrid.org] De la part de arda<br>
Envoyé : mercredi 2 juillet 2008 23:13<br>
À : Gate-users@lists.healthgrid.org<br>
Objet : [Gate-users] Sinogram Output<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Hello,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â I am a beginner in GATE. <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>(CLHEP 2.0.3.1 / Geant4 9.0 / root 5.14 / gate3.1.2)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â I am trying to obtain sinogram data from
"PET_Ecat_System.mac" example<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>and visualize them on IDL. I read theÂ
"yourSinogram_1.ima" and<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>"yourSinogram_1_del.ima" (both 162 Mb) data
on IDL and the entire data<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>are zero.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â Attached the log file and the macro I used<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>1) Could you tell me what I am doing wrong ?<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>2) Also, what are the differences between
"yourSinogram_1.ima",<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>"yourSinogram_1_del.ima" and
"yourSinogram_1.sct.ima" output data. Which<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>one I need to use on IDL to read the actuall sinogram?<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Arda<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Â <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>>Â Â Â Â Â Â Â Â <o:p></o:p></span></font></p>
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