<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><br class=""><div><blockquote type="cite" class=""><div class="">On 20. Dec 2017, at 15:37, Bryan McIntosh <<a href="mailto:mcintoshster@gmail.com" class="">mcintoshster@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div dir="ltr" class="">Hi Amir,<div class=""><br class=""></div><div class="">Thinking briefly and without doing any testing, there are two approaches I can think of that would probably work.</div><div class=""><br class=""></div><div class="">The first and easiest is to simulate the entire sphere, then discard any data from the rest of the sphere that is in the regions that would not be physically present. This would be relatively easy to do in your data analysis since you would just exclude detector data if the rsector (or equivalent) number is not within a certain range. The tradeoff to this is that your simulation would take longer than it would for simply a quarter-sphere, since it's calculating interactions for parts of the system that you will be discarding. The final data file size will be a great deal larger as well.</div><div class=""><br class=""></div><div class="">The second approach would be to use the generic "scanner" architecture and place the detector segments in the world manually. This would require some very careful planning and use of the visualization system to verify that you've placed the segments properly in your quarter-sphere arrangement, but the simulations themselves would run more quickly.</div><div class=""><br class=""></div><div class="">I hope this is helpful!</div><div class=""><br class=""></div><div class="">-Bryan<br class=""><div class="gmail_extra"><br class=""><div class="gmail_quote">On Wed, Dec 20, 2017 at 5:00 AM, <span dir="ltr" class=""><<a href="mailto:gate-users-request@lists.opengatecollaboration.org" target="_blank" class="">gate-users-request@lists.opengatecollaboration.org</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send Gate-users mailing list submissions to<br class="">
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1. quarter-sphere PET scanner (Amir Ghabrial)<br class="">
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Message: 1<br class="">
Date: Tue, 19 Dec 2017 15:48:47 +0000<br class="">
From: Amir Ghabrial <<a href="mailto:eng_amir_shawky@hotmail.com" class="">eng_amir_shawky@hotmail.com</a>><br class="">
To: "<a href="mailto:gate-users@lists.opengatecollaboration.org" class="">gate-users@lists.<wbr class="">opengatecollaboration.org</a>"<br class="">
<<a href="mailto:gate-users@lists.opengatecollaboration.org" class="">gate-users@lists.<wbr class="">opengatecollaboration.org</a>><br class="">
Subject: [Gate-users] quarter-sphere PET scanner<br class="">
Message-ID:<br class="">
<<a href="mailto:DM5PR03MB25076875A199F6BA64F386DBAB0F0@DM5PR03MB2507.namprd03.prod.outlook.com" class="">DM5PR03MB25076875A199F6BA64F3<wbr class="">86DBAB0F0@DM5PR03MB2507.<wbr class="">namprd03.prod.outlook.com</a>><br class="">
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Dear all<br class="">
<br class="">
I just want to add a block detectors on a quarter-sphere scanner so how I can do that while there are only linear and ring repeaters.<br class="">
<br class="">
I tried the sphere repeater but it doesn't work and give me an error, as it only repeats the whole sphere and I want to simulate just a quarter of a sphere.<br class="">
Thank you all for your time and Considerations<br class="">
<br class="">
<br class="">
Kind regards,<br class="">
<br class="">
Amir Ghabrial<br class="">
PhD Research Student<br class="">
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