<div dir="ltr">My understanding is you should not set both the voxel size and resolution. They are two ways of doing the same thing. Check the Gate documentation on setting up dose actors. This may fix your empty results, though everything will probably be zero as your table is listed as air.<div><br></div><div>Best,</div><div><br></div><div>Ben</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 5, 2017 at 5:43 PM, Emmanuel Marfo <span dir="ltr"><<a href="mailto:emmanuel.marfo@postgrad.otago.ac.nz" target="_blank">emmanuel.marfo@postgrad.otago.ac.nz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div id="m_-4576844117387548528divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<p>Hi Benjamin,</p>
<p>Your first point is well noted.</p>
<p>For the second part</p><span class="">
<p><span style="color:rgb(33,33,33);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px">>>>Your second problem is the phantom and your scanner should not be attached. Attach your phantom
to the world and then you don't have to worry about counter rotating it. This was causing me problems as well.</span><br>
</p>
<p><span style="color:rgb(33,33,33);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px"><br>
</span></p>
</span><p><span style="color:rgb(33,33,33);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px">Initially my phantom was attached to the world and the scanner was rotating around it. I attached
my DoseActor to the phantom and it gave me empty results. I then attached the phantom with the DoseActor to the scanner and it gave me some results. Because the phantom was rotating also I applied negative rotation to it.</span></p>
<p><span style="color:rgb(33,33,33);font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px">I will really appreciate it if you can help me solve my second problem? Thanks</span></p>
<p><font color="#212121" face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px">Cheers,</span></font></p>
<p><font color="#212121" face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px">Emmanuel</span></font></p>
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<hr style="display:inline-block;width:98%">
<div id="m_-4576844117387548528divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Kopchick, Benjamin <<a href="mailto:kopchickbp@email.gwu.edu" target="_blank">kopchickbp@email.gwu.edu</a>><br>
<b>Sent:</b> Thursday, 6 July 2017 3:29:16 a.m.<br>
<b>To:</b> Emmanuel Marfo<br>
<b>Cc:</b> <a href="mailto:gate-users@lists.opengatecollaboration.org" target="_blank">gate-users@lists.<wbr>opengatecollaboration.org</a><br>
<b>Subject:</b> Re: [Gate-users] Helical Movement</font>
<div> </div>
</div><div><div class="h5">
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<div dir="ltr">Hey Emmanuel,
<div><br>
</div>
<div>It looks like your helical movement is fine, just your world is too small or you are extending too far. Based on how geometries are handled, your world extends from 40 cm to -40 cm in the z-direction. However, with a quick calculation, you are moving your
phantom 0.9 mm/s for 720 s, which places it 64.8 cm in the z-direction, which is outside your world. Your second problem is the phantom and your scanner should not be attached. Attach your phantom to the world and then you don't have to worry about counter
rotating it. This was causing me problems as well. I made these two changes, and your program runs fine.</div>
<div><br>
</div>
<div>Best,</div>
<div><br>
</div>
<div>Ben Kopchick</div>
<div>Ph.D. Student</div>
<div>The George Washington University</div>
<div>Department of Physics</div>
<div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Jul 4, 2017 at 3:53 AM, Emmanuel Marfo <span dir="ltr">
<<a href="mailto:emmanuel.marfo@postgrad.otago.ac.nz" target="_blank">emmanuel.marfo@postgrad.otago<wbr>.ac.nz</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div id="m_-4576844117387548528m_6027043222959143876m_1057339773082723820divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<p>Hi Gate-User,</p>
<p>I have been trying to incorporate helical movement into my simulation. I have a gantry that rotates around a phantom. The Phantom also has translational movement as the gantry rotates around it. During simulation the translational movement of the phantom
causes it to go beyond the world volume bringing the run to a halt. I am finding it difficult to do this helical movement. I have attached a simple file so that any willing to help me could have a look at it. Please, I need your help. Thanks.</p>
<p>Best regards,</p>
<p>Emmanuel Marfo</p>
<p>University of Otago</p>
<p>Student</p>
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