You can simulate two separate sources. One is the high activity point source and the other is the background activity cylinder.<br><br>Make sure you define them as separate sources and instructions on defining sources can be found in the GATE users manual.
<br><br>cheers<br>Lucky<br><br><div><span class="gmail_quote">On 06/06/07, <b class="gmail_sendername">Guifen Lin</b> <<a href="mailto:guifen_lin@yahoo.com.cn">guifen_lin@yahoo.com.cn</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,all gate-users<br>Could you tell me how to simulate the sources which a high activity sphere source is inserted in the lower activity cylinder water phantom (as blackground activity) using gate.<br>Thanks in advance! <p>
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