<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<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">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<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.LCsBijnq.N30MFL2x@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>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Gate-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Gate-users@lists.opengatecollaboration.org">Gate-users@lists.opengatecollaboration.org</a>
<a class="moz-txt-link-freetext" href="http://lists.opengatecollaboration.org/mailman/listinfo/gate-users">http://lists.opengatecollaboration.org/mailman/listinfo/gate-users</a></pre>
</blockquote>
</body>
</html>