<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1458" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2> </FONT> <DIV><FONT face=Arial size=2>Hello,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>We were running gate on RedHat 9 . When the output ascii file "gate_coincidence.dat" size  exceeded 2GB I got an error saying maximum file size exceeded and the program terminated.</FONT></DIV> <DIV><FONT face=Arial size=2>Does anybody have idea on how to fix this problem.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>thankyou</FONT></DIV></DIV> <DIV><FONT face=Arial size=2>Amarnath Srinivasan<BR>Research Assistant<BR>Center for Advanced Imaging<BR>PO Box 9235<BR>Dept of Radiology, HSC, WVU<BR>Morgantown, WV 26506<BR><A href="mailto:asrinivasan@hsc.wvu.edu">asrinivasan@hsc.wvu.edu</A></FONT></DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=yuxuan.zhang@di.mdacc.tmc.edu href="mailto:yuxuan.zhang@di.mdacc.tmc.edu">yuxuan.zhang@di.mdacc.tmc.edu</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=gate-users@lphe1pet1.epfl.ch href="mailto:gate-users@lphe1pet1.epfl.ch">gate-users@lphe1pet1.epfl.ch</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, August 24, 2004 5:08 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> [gate-users] about random coincidences </DIV> <DIV><BR></DIV><BR><FONT face=sans-serif size=2>hi all,</FONT> <BR><BR><FONT face=sans-serif size=2>In my simulation I noticed a strange result that I can not figure it out.</FONT> <BR><FONT face=sans-serif size=2>My setup is that: using cylindricalPET system with 30 rsetors, one point</FONT> <BR><FONT face=sans-serif size=2>source at the center. The radiation activity is very high, thus there are</FONT> <BR><FONT face=sans-serif size=2>lots of random coincidences (accidental coincidences) in the totoal</FONT> <BR><FONT face=sans-serif size=2>coincidences. Now I do the statistics on these random coincidences according</FONT> <BR><FONT face=sans-serif size=2>to the sector index, then I found that the coincidences between 2 opposite rsectors </FONT><BR><FONT face=sans-serif size=2>(e.g. No.0 and 15, or No.5 and 20) are much more than the coincidences between other</FONT> <BR><FONT face=sans-serif size=2>2 sectors ( No. 0 and 14, or No. 0 and 16 ...) Usually the difference can be 50% or 100% depend on the thickness of the detector. Is anyone else noticed that?</FONT> <BR><FONT face=sans-serif size=2>Can you have a try in your computer to find out whether this is a bug of GATE or there</FONT> <BR><FONT face=sans-serif size=2>is somthing wrong with my simulation? Thank you very much.</FONT> <BR><BR><BR><FONT face=sans-serif size=2>Best regards,</FONT> <BR><BR><FONT face=sans-serif size=2>Yuxuan Zhang</FONT> <BR><BR><BR><FONT face=sans-serif size=2>Dr. Yuxuan ZHANG <BR>Dept. Experimental Diagnostic Imaging<BR>Univ. Texas, MD Anderson Cancer Center<BR>1515 Holcombe Blvd, Unit 217<BR>Houston, TX 77030-4095<BR><BR>Tel: +1-713-745-1671 <BR>Fax: +1-713-745-1672</FONT> <P> <HR> <P></P>_______________________________________________<BR>gate-users mailing list<BR>gate-users@lphe1pet1.epfl.ch<BR>http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users<BR></BLOCKQUOTE></BODY></HTML>