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<p>Dear all, <br>
</p>
<p>The artifact seen in the projection was generated by the
applied spatial blurring module during digitization and it only
affects to detectors of different sizes along X and Y directions.
This error was introduced in version 9.0. It is now corrected in
the branch develop
(<a class="moz-txt-link-freetext" href="https://github.com/OpenGATE/Gate/pull/546/files">https://github.com/OpenGATE/Gate/pull/546/files</a>).</p>
<p>Best regards, <br>
</p>
<p>Ane<br>
</p>
<div class="moz-cite-prefix">On 08/08/2022 18:41, Ane Etxebeste
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:2f6588ff-ceb9-23b5-7cbd-8f702a287c65@creatis.insa-lyon.fr">
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<p>Hi all, <br>
</p>
<p>I have found the same type of artifact in SPECT projections as
Miriam did a while ago. You can find attached a screenshot of a
projection for a centered point-like source at a certain
distance of a SPECT detector head (Gate version 9.2). Counts on
the left side are accumulated in the upper left part of the
image, they can be seen as a white horizontal line. <br>
</p>
<p>Has anyone faced this before and can shed some light on the
issue?</p>
<p>Thanks!<br>
</p>
<p>Best regards,</p>
<p>Ane<br>
</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 20/08/2020 01:57, Miriam Dixon
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAKQywEUjSo+UQ3vaOmE6huZNfvpgBjCBBAT21QU19cQc7buOZg@mail.gmail.com">
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<div>Hi Gate-Users,</div>
<div><br>
</div>
<div>I am running SPECT simulations in GATEv9.0, collecting
the output as .sin projection files. I am curious if anyone
recognises, and knows the cause of, the little line of
counts that consistently appear in the top left hand corner
of my projection data? I have circled it in yellow in the
image attached.<br>
</div>
<div>
<div><img
src="cid:part1.VNMR0Tce.by2GSjIN@creatis.insa-lyon.fr"
alt="LineArtifact.PNG" style="margin-right: 0px;"
class="" width="451" height="377"></div>
<div>As far as I know it isn't a problem as it doesn't
interfere with the rest of my projection data, but I would
be very interested to know if anyone else has seen it.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Miriam<br>
</div>
</div>
</div>
<br>
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