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<TITLE>Re: [Gate-users] question about setting x-ray sources in mammography</TITLE>
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<FONT FACE="Verdana"><SPAN STYLE='font-size:12.0px'>Hi Yiheng,<BR>
<BR>
There is no pre-defined x-ray source in Gate. You will have to use the generalized particle source (gps) with a user-defined photon energy spectrum. If you can’t find the spectrum you need in the literature, you can either use an estimate ( by analytical means ) or a spectrum obtained by simulating the source (electron gun and target). (I have done that to simulate out microCT scanner)<BR>
<BR>
Richard<BR>
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On 3/23/08 1:39 PM, "Yiheng Zhang" <yihengzhang@gmail.com> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Verdana"><SPAN STYLE='font-size:12.0px'>Dear Gators,<BR>
<BR>
I am new in Gate tools and now working to simulate scattering in x-ray mammography for breast imaging. <BR>
I have learned the benchmark examples of PET and SPECT and also the user's guide. Now I have <BR>
a quick question, how to set up the x-ray source in mammography system? For example, <BR>
if I like to simulate a Rhodium target with a Rhodium filter (Rh/Rh) with about 30 KVp, is there any <BR>
source already listed in Gate for that purpose? or I should specify the source material by myself?<BR>
Thank you very much for the help. <BR>
<BR>
Yiheng<BR>
<BR>
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-- <BR>
<FONT COLOR="#0000FF"><I>Richard Taschereau, Ph.D.<BR>
Crump Institute for Molecular Imaging<BR>
University of California Los Angeles<BR>
700 Westwood Plaza, A222<BR>
Los Angeles, CA 90095-1770<BR>
Phone: (310) 825-0697<BR>
Fax: (310) 206-8975<BR>
email: RTaschereau@mednet.ucla.edu<BR>
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