<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none;"></style> </head> <body dir="ltr"> <div id="divtagdefaultwrapper" style="font-size:12pt; color:#000000; background-color:#FFFFFF; font-family:Calibri,Arial,Helvetica,sans-serif"> <p></p> <div>Dears Experts,</div> <div><br> </div> <div>I have two questions regarding to radiotherapy example 6 (proton beam in a heterogeneous phantom). </div> <div><br> </div> <div>1- There was only one dose actor in the main macro file named “IDD.txt”, but after running the example another dose actor resulted called “IDD-Dose-to-Water” as well. I am confused between these two actors and how they were generated?</div> <div><br> </div> <div>2- When higher density materials, such as lead, was <span> embedded at the first layer of the water phantom instead of bone </span>, dose to higher density materials was lower than that to water which is not as expected. Dose supposed to be higher for material with higher Z numbers. </div> <div><br> </div> <div>Many thanks in advance,</div> Awad<br> <p></p> <p><br> </p> <div id="Signature"> <p>Sent from <a href="http://aka.ms/weboutlook" id="LPNoLP">Outlook</a><br> </p> </div> </div> </body> </html>