<div dir="ltr">Hi Omar,<div><br></div><div>Thanks for your response. Yes there is an overlap. From my understanding of your description, did you mean attributing the hole cylinder to another mother volume so the volumes under the same mother volume won't overlap with each other?</div><div><br></div><div>Actually I just want to drill a hole on a plastic phantom with the same length as the phantom, and the hierarchy is very simple, a solid cylinder plastic phantom under the world level with a same length cylinder rod inserted in it. Do you think it is applicable without overlap?</div><div><br></div><div>Best,</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 31, 2020 at 2:13 PM Omar Bin Sheetan <<a href="mailto:omar.binsheetan@postgrad.manchester.ac.uk">omar.binsheetan@postgrad.manchester.ac.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<span style="color:rgb(0,0,0);font-family:-webkit-standard;font-size:medium">Hello Xinjie,</span>
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As long as there’s no overlapping and every daughter volume is contained within its mother volume, I think things should be fine. In my understanding, the daughters of a volume should not intersect (overlap) with each other. </div>
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In your case, is there an overlap? Have you chosen the right mother volume for your air phantom?</div>
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Regards</div>
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Omar </div>
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<blockquote type="cite">On Jul 31, 2020, at 3:37 PM, Xinjie Cao <<a href="mailto:xinjie.cao@stonybrook.edu" target="_blank">xinjie.cao@stonybrook.edu</a>> wrote:<br>
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<div dir="ltr">Dear all,
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<div>I used to implement the hole drilling on a phantom as followed,</div>
<div>```</div>
<div>/gate/world/daughters/name phantom1<br>
/gate/world/daughters/insert cylinder<br>
/gate/phantom1/placement/setTranslation 0.0 0.0 0.0 mm<br>
/gate/phantom1/geometry/setRmax 100. mm<br>
/gate/phantom1/geometry/setHeight 500 mm<br>
/gate/phantom1/setMaterial Polyethylene<br>
#/gate/phantom/vis/forceWireframe<br>
#/gate/phantom/vis/setColor green<br>
/gate/phantom1/attachPhantomSD<br>
<br>
/gate/world/daughters/name phantom2<br>
/gate/world/daughters/insert cylinder<br>
/gate/phantom2/placement/setTranslation 0.0 -25.0 0.0 mm<br>
/gate/phantom2/geometry/setRmax 3.0 mm<br>
/gate/phantom2/geometry/setHeight 500 mm<br>
/gate/phantom2/setMaterial Air<br>
#/gate/phantom/vis/forceWireframe<br>
#/gate/phantom/vis/setColor green<br>
/gate/phantom2/attachPhantomSD<br>
</div>
<div>```</div>
<div>But I have been always thinking whether the air phantom I insert works as the drilled hole? Or does it work as a cylinder mixed with polyethylene and air? </div>
<div>Another way to say is whether a new phantom placed within the other phantom volume will take the place of the original material or mix with it?</div>
<div>Any answer would be highly appreciated! Thanks!</div>
<div><br>
</div>
<div>Best,</div>
<div>Xinjie</div>
</div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><b><font color="#000000">....................................................</font></b><br></div><div><b><span style="color:rgb(153,0,0);font-family:"arial black",sans-serif;font-size:x-small">Xinjie Cao</span></b><br></div><div><b><font size="1" face="arial black, sans-serif">M.E. / Ph.D. student</font></b></div><div><b><font size="1" face="arial black, sans-serif">Research Project Assistant</font></b></div><div><b><font size="1" face="arial black, sans-serif">Department of Electrical and Computer Engineering & Radiology </font></b></div><div><b><font size="1" face="arial black, sans-serif">Novel Medical Imaging Technologies Lab</font></b></div><div><b><font size="1" face="arial black, sans-serif">Health Science Center Level 8</font></b></div><div><b><font size="1" face="arial black, sans-serif">Stony Brook, NY 11794-8460 </font></b></div><div><b><font size="1" face="arial black, sans-serif">Tel: +1 (631)202-9445</font></b></div><div><a href="https://you.stonybrook.edu/goldan/people/" target="_blank">you.stonybrook.edu/goldan/people/</a><b><font size="1" face="arial black, sans-serif"><br></font></b></div><div><font size="1" face="arial black, sans-serif"><b>email: </b><a href="mailto:xinjie.cao@stonybrook.edu" target="_blank"><b>xinjie.cao@stonybroo</b>k.edu</a></font></div><div><font size="1" face="arial black, sans-serif"><br></font></div><div><font size="1" face="arial black, sans-serif"> </font><img src="https://docs.google.com/uc?export=download&id=12iMPAuaMtpKRdkcmBleVsP6iWiM4wlm_&revid=0B_TLWOu4jP1eWnFFRW9qQXlicTY3ZTVzWnR5QkRVY3RRT3JVPQ" width="200" height="28"> <img src="https://drive.google.com/a/stonybrook.edu/uc?id=17TB1Ha3enD8HC5e_Ez238vpeBF92aCgH&export=download" width="200" height="33"></div><div><div><b><font color="#000000">....................................................</font></b></div><div>It is prohibited to distribute or publish the files attached to any other people unless you get permission from the writer himself. All rights reserved.</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>