<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US">Hi Joe,</span></div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US"></span> </div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US">You can use XCOM program to learn linear attenuation coefficients. (you can download this program from below link)</span></div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US">unit of linear attenueation coefficent is cm^-1. </span></div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US"></span> </div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US"><font color="#000000"><span style="FONT-FAMILY: 'Constantia','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: EN-US" lang="EN-US">μ</span><sub><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-theme-font: minor-fareast; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: EN-US" lang="EN-US">l </span></sub><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'; mso-fareast-theme-font: minor-fareast; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: EN-US" lang="EN-US">is called the linear attenuation coefficient of the absorber. It has dimensions (thickness)<sup>-1</sup> and usually is expressed in cm<sup>-1</sup></span></font></span></div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US"><a href="http://physics.nist.gov/PhysRefData/Xcom/Text/XCOM.html" target="_blank"><font color="#2a5db0">http://physics.nist.gov/PhysRefData/Xcom/Text/XCOM.html</font></a></span></div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US"></span> </div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US">hope it helps,</span></div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US"></span> </div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt" lang="EN-US">sebnem</span></div><br><br>
<div class="gmail_quote">On Fri, Aug 21, 2009 at 2:36 PM, Joe Aoun <span dir="ltr"><<a href="mailto:joe.aoun@imag.fr">joe.aoun@imag.fr</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Dear Gate users,<br><br>Does anyone know how to get the linear attenuation coefficient values of the different materials used in a GATE simulation ?<br>
And what is the unit of the coefficients ?<br><br>Thank you for your help !!<br><br>Regards,<br><br>Joe<br><br>-- <br>============================================<br>Joe Aoun<br>Laboratoire TIMC-IMAG<br>Équipe GMCAO<br>Université Joseph Fourier - Faculté de médecine<br>
Domaine de la Merci<br>38706 La Tronche - France<br>Tel. +33 (0)4 56 52 00 12<br>Fax +33 (0)4 56 52 00 55<br>Sec. +33 (0)4 56 52 00 07<br>E-mail: <a href="mailto:Joe.Aoun@imag.fr" target="_blank">Joe.Aoun@imag.fr</a><br>
<br>_______________________________________________<br>Gate-users mailing list<br><a href="mailto:Gate-users@lists.healthgrid.org" target="_blank">Gate-users@lists.healthgrid.org</a><br><a href="http://lists.healthgrid.org/mailman/listinfo/gate-users" target="_blank">http://lists.healthgrid.org/mailman/listinfo/gate-users</a><br>
</blockquote></div><br><br clear="all">
<div></div><br>-- <br>Sebnem Erturk<br>University of Pisa<br>Applied Physics Dpt.<br>Largo Pontecorvo<br>56127 Pisa-Italy<br>Office :0039 050 2214346<br>Mobile :0039 345 3331440<br><a href="http://www.df.unipi.it/~fiig/">http://www.df.unipi.it/~fiig/</a><br>