<HTML dir=ltr><HEAD><TITLE>RE: [Gate-users] [Gate-devel] Can voxlelized and non-voxelized phantoms be simulated together?</TITLE> <META http-equiv=Content-Type content="text/html; charset=unicode"> <META content="MSHTML 6.00.2900.3527" name=GENERATOR></HEAD> <BODY> <DIV id=idOWAReplyText83192 dir=ltr> <DIV dir=ltr><FONT face=Arial color=#000000 size=2>Thanks all for comments.</FONT></DIV> <DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV> <DIV dir=ltr><FONT face=Arial size=2>To summarize, </FONT></DIV> <DIV dir=ltr><FONT face=Arial size=2>1) currently there are no overlap phantoms allowed in GATE, even if both are non-voxelized and mother and daughter (I checked it with G4 </FONT><FONT face=Arial size=2>tracking segmentation);</FONT></DIV> <DIV dir=ltr><FONT face=Arial size=2>2) we can have non-overlapped phantoms, voxelized or non-voxelized or both;</FONT></DIV> <DIV dir=ltr><FONT face=Arial size=2>3) GATE may modify the Phantom module using G4AssemblyVolume method to allow overlap phantoms in the future.</FONT></DIV> <DIV dir=ltr> </DIV> <DIV dir=ltr><FONT face=Arial size=2>Am I missing something?</FONT> </DIV> <DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV></DIV> <DIV id=idSignature12099 dir=ltr> <DIV RE><FONT face=Arial size=2>Yu Chen, Ph.D. </FONT></DIV> <DIV RE><FONT face=Arial size=2>University of Massachusetts Medical School </FONT></DIV> <DIV RE><FONT face=Arial size=2>Department of Radiology </FONT></DIV> <DIV RE><FONT face=Arial size=2>55 Lake Avenue North </FONT></DIV> <DIV RE><FONT face=Arial size=2>Worcester, MA 01655-0243 </FONT></DIV> <DIV RE><FONT face=Arial size=2>Phone: (508) 856-6123 </FONT></DIV> <DIV RE><FONT face=Arial size=2>Fax: (508) 856-6363</FONT></DIV> <DIV RE> <DIV RE> <DIV RE><PRE></PRE></DIV></DIV></DIV></DIV> <DIV dir=ltr><BR> <HR tabIndex=-1> <FONT face=Tahoma size=2><B>From:</B> Avery, Stephen [mailto:Avery@xrt.upenn.edu]<BR><B>Sent:</B> Thu 6/4/2009 9:08 AM<BR><B>To:</B> Chen, Yu; gate-users@lists.healthgrid.org; gate-devel@lists.healthgrid.org<BR><B>Subject:</B> RE: [Gate-users] [Gate-devel] Can voxlelized and non-voxelized phantoms be simulated together?<BR></FONT><BR></DIV> <DIV> <P><FONT size=2>Hi Chen,<BR>Have you tried to use G4AssemblyVolume? It is a class which allows<BR>several volumes to be combined in an arbitrary way in 3D space.<BR><BR>Stephen<BR><BR><BR>-----Original Message-----<BR>From: gate-users-bounces@lists.healthgrid.org<BR>[<A href="mailto:gate-users-bounces@lists.healthgrid.org">mailto:gate-users-bounces@lists.healthgrid.org</A>] On Behalf Of Niklas<BR>Rehfeld<BR>Sent: Thursday, June 04, 2009 3:11 AM<BR>To: Chen, Yu; gate-users@lists.healthgrid.org;<BR>gate-devel@lists.healthgrid.org<BR>Subject: Re: [Gate-users] [Gate-devel] Can voxlelized and non-voxelized<BR>phantoms be simulated together?<BR><BR>Hi Yu,<BR><BR>On Thu, 04 Jun 2009 01:14:37 +0200, Chen, Yu <Yu.Chen@umassmed.edu><BR>wrote:<BR><BR>> Hi,<BR>> Does anyone have experience simulating voxelized and non-voxelized <BR>> phantoms together with non-voxelized phantom embedded in voxelized <BR>> phantom?<BR>> It seems there is no complaint for GATE for doing so. But I still<BR>could <BR>> not see the non-voxelized phantom.<BR>><BR><BR>Geant4 doesn't allow for overlaps of volumes, i.e. if you place a <BR>non-voxelized phantom in a voxelized phantom the outcome is undefined.<BR>To my knowledge logic operations between voxelized and non-voxelized <BR>phantoms are not possible.<BR>For fictitious volumes I can tell you for sure that it doesn't work.<BR>It might work for the sources (I would guess that they are added).<BR><BR>Hope this helps,<BR><BR>Niklas<BR>_______________________________________________<BR>Gate-users mailing list<BR>Gate-users@lists.healthgrid.org<BR><A href="http://lists.healthgrid.org/mailman/listinfo/gate-users">http://lists.healthgrid.org/mailman/listinfo/gate-users</A><BR><BR></FONT></P></DIV></BODY></HTML>