<div dir="ltr">Hi marina and other castor users<div>Should I change or add TOF information in .cdh file manually to see the effect of TOF variations?</div><div>As I mentioned in the previous emails when I use "-TOF reso" command on castor-GATERootToCastor I see the warning:" quantization TOF bin size wrong or not provided, so switching to TOF list-mode reconstruction which neglects the quantization TOF bin size!" on the reconstruction process. In previous email I sent two of the content of the .cdh files.</div><div>Thank you so much for your help</div><div>Best</div><div>Hadi</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 15, 2020 at 8:27 PM Hadi Rezaei <<a href="mailto:hrezaei.m.ph@gmail.com">hrezaei.m.ph@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><div dir="ltr">I use castor_v3.0.1. Two of the content of my .cdh files are below:<div>1) </div><div>Data filename: miniderenzo420ring0.6sTOF_df.Cdf<br>Number of events: 46858725<br>Data mode: list-mode<br>Data type: PET<br>Start time (s): 0<br>Duration (s): 0.6<br>Scanner name: miniderenzo420ring0.6sTOF<br>Calibration factor: 1<br>Isotope: unknown<br>TOF information flag: 1<br>TOF resolution (ps): 430<br>List TOF measurement range (ps): 5753.19<br>Coincidence kind flag: 1<br>Maximum axial difference mm: 1200<br></div><div><br></div><div>2)</div><div>Data filename: miniderenzo336ring0.6sTOF350_df.Cdf<br>Number of events: 42513982<br>Data mode: list-mode<br>Data type: PET<br>Start time (s): 0<br>Duration (s): 0.6<br>Scanner name: miniderenzo336ring0.6sTOF350<br>Calibration factor: 1<br>Isotope: unknown<br>TOF information flag: 1<br>TOF resolution (ps): 350<br>List TOF measurement range (ps): 4800<br>Coincidence kind flag: 1<br>Maximum axial difference mm: 960</div><div>***********************************************</div><div>The TOF values are 430 ps and 350 ps that I added on "-TOF reso" on cstor-GATERootToCastor. I only added "Maximum axial difference" on .cdh files.</div><div>thank you so much</div><div>Best</div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 15, 2020 at 7:21 PM FILIPOVIC PIERUCCI Marina <<a href="mailto:Marina.FILIPOVICPIERUCCI@cea.fr" target="_blank">Marina.FILIPOVICPIERUCCI@cea.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div style="direction:ltr;font-family:Tahoma;color:rgb(0,0,0);font-size:10pt">Strange, which version of CASToR do you use? What is the size of the list mode TOF quantization bin and what do you mean by different TOF values, different values of the TOF quantization
bin size? Do you add this info in the .cdh yourself or do you rely on the GATE to CASToR converter?<br>
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<div id="gmail-m_-1175059163579513429gmail-m_572041934623202201divRpF638211" style="direction:ltr"><font size="2" face="Tahoma" color="#000000"><b>De :</b> Hadi Rezaei [<a href="mailto:hrezaei.m.ph@gmail.com" target="_blank">hrezaei.m.ph@gmail.com</a>]<br>
<b>Envoyé :</b> mardi 15 septembre 2020 16:29<br>
<b>À :</b> FILIPOVIC PIERUCCI Marina<br>
<b>Cc :</b> <a href="mailto:castor-users@lists.castor-project.org" target="_blank">castor-users@lists.castor-project.org</a><br>
<b>Objet :</b> Re: [Castor-users] PSF+TOF reconstruction error<br>
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<div dir="ltr">Hi Marina
<div>Thank you for responding</div>
<div>My reconstructed image is Ok and when I imply only TOF (not PSF) I don't see this warning and the TOF bin is provided in .cdh file however the different TOF values don't make a difference in image quality. Is this an issue in the reconstruction process
or it is normal?</div>
<div>Thank you</div>
<div>Best</div>
<div>Hai</div>
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<div dir="ltr" class="gmail_attr">On Tue, Sep 15, 2020 at 2:46 PM FILIPOVIC PIERUCCI Marina <<a href="mailto:Marina.FILIPOVICPIERUCCI@cea.fr" rel="noopener noreferrer" target="_blank">Marina.FILIPOVICPIERUCCI@cea.fr</a>> wrote:<br>
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<div>Hi Hadi,</div>
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<div>This warning should be related only to TOF, not to the use of PSF. It says that your input datafile implies that your scanner has an (almost) infinite precision for TOF measurements. If this is the case everything's ok, otherwise if your scanner quantizes
TOF measurements, you should provide the quantization bin or step it in the datafile header (.cdh).</div>
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<div>All of this won't really make a difference for the reconstructed image, unless the quantization of the TOF measurements is very rough, which is probably not the case for your scanner.</div>
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<div>Is the reconstructed image OK?<br>
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<div>Best</div>
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<div>Marina</div>
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<div id="gmail-m_-1175059163579513429gmail-m_572041934623202201gmail-m_-5083435752313570582divRpF6589" style="direction:ltr"><font size="2" face="Tahoma" color="#000000"><b>De :</b> Castor-users [<a href="mailto:castor-users-bounces@lists.castor-project.org" rel="noopener noreferrer" target="_blank">castor-users-bounces@lists.castor-project.org</a>]
de la part de Hadi Rezaei [<a href="mailto:hrezaei.m.ph@gmail.com" rel="noopener noreferrer" target="_blank">hrezaei.m.ph@gmail.com</a>]<br>
<b>Envoyé :</b> mardi 15 septembre 2020 12:05<br>
<b>À :</b> <a href="mailto:castor-users@lists.castor-project.org" rel="noopener noreferrer" target="_blank">
castor-users@lists.castor-project.org</a><br>
<b>Objet :</b> [Castor-users] PSF+TOF reconstruction error<br>
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<div>Dear CASToR users</div>
<div>I used TOF + psf for reconstruction a Derenzo phantom but I found this warning. </div>
<b>"Warning: quantization TOF bin size wrong or not provided, so switching to TOF list-mode reconstruction which neglects the quantization TOF bin size!"</b><br>
<div>Does it mean that I can not use psf and TOF together in CASTOR?? I need to investigate PSF+TOF. How can I do it??</div>
<div>Any help would be appreciated.</div>
<div>Best</div>
<div>Hadi</div>
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