<div dir="auto"><div dir="auto">Hi Jacub,<div dir="auto"><br></div><div dir="auto">Have you divided the estimated TOF bin scatter rates with the spatial width of the TOF bin, directly in the list-mode datafile, as explained in the documentation (general and TOF-specific) ?</div><div dir="auto"><br></div><div dir="auto">Marina</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 18 Aug 2021, 00:52 jbaran, <<a href="mailto:jakub.baran@ifj.edu.pl" target="_blank" rel="noreferrer">jakub.baran@ifj.edu.pl</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Castor Developers and Users,<br>
<br>
I am trying to incorporate the information about the scatter correction <br>
in LM-TOF-MLEM reconstruction. I have calculated the scatter fraction <br>
for each TOF bin. The values of scatter rate are in range 1-2. I have <br>
applied them for the reconstruction, however the reconstructed images <br>
seem to be not corrected for scatter. Please find the attached <br>
screenshot. On the top panel, the reconstructed image with true+scatter <br>
coincidences is presented and on the bottom the same coincidences were <br>
used but with scatter correction applied. On the right corresponding <br>
line profiles are presented (ots - no scatter correction; corrected1 - <br>
scatter correction applied)<br>
<br>
FYI: The total number of coincidences used for the reconstruction is 1 <br>
order of magnitude lower than the number of possible LORs.<br>
<br>
Do you have any idea what kind of values should be applied for the <br>
scatter rate? Did you have any similar case and found the solution how <br>
the scatter rate should be calculated?<br>
<br>
All the best,<br>
Jakub<br>
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