<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello, <div><br></div><div><br><div><div><div>Le 25 janv. 2013 à 06:05, Karr Aguwa a écrit :</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr">Hello Gate Users, <div><br></div><div>I am trying to define a voxelized source and phantom in Gate, and I am stuck at defining the range files. I have used NCAT to generate my phantom, then I used a small matlab script to convert to the int16 format as specified. </div> <div><br></div><div><b>1st) Question</b></div><div>How do you properly define this range file? This range file defines the ranges of the different organs that's in the phantom. So where can I get the information to define this range file? The user manual doesn't explain where those values from or where to find it. I have been messing round with th example that's in the example folder but I still don't understand where the values are coming from. Please help!</div> <div><br></div></div></blockquote><div><br></div><div>Indeed, you can find an example of how to use range file in the "Voxelized_Phantom_Source" example available in the example folder of gate sources. You 'll also find another example in the preclinical example available on GATE website in the example section. Basically: </div><div>- the first line contains only the total number of lines</div><div>- the other lines define the range "inferior bin" "superior bin" and activity value</div><div><br></div><div>The activity value is relative, since GATE gives a result per particle. Therefore, if you put</div><div>2</div><div>1 8 0 </div><div>9 9 1 </div><div><br></div><div>your source will be uniformly distributed all voxels labeled "9". </div><div><br></div><div>About how you define the labeled, it's totally up to you or to your phantom. </div><div><br></div><div>If your phantom is labeled as: </div><div><br></div><div>1: skin</div><div>2: bladder</div><div>3:liver</div><div>...</div><div><br></div><div>and you want to localize the source in the bladder, the you should define the line "2 2 1" and others to 0.</div><div><br></div><br><blockquote type="cite"><div dir="ltr"><div><b>2nd) Question</b></div><div>The same from above, where does the values come from for the activity range file as well? I understand what it's doing, but where/how do I figure out the values. </div></div></blockquote><div>Again, if i get it correctly, your values totally depend on the labeled voxels of your phantom. </div><div><br></div><blockquote type="cite"><div dir="ltr"><div>I know you specify a range and the activity in the file. Does the activity you put in there over writes the activity you set in the source? like this /gate/source/voxel/setActivity 1 Ci Help please!!</div> <div><br></div></div></blockquote><blockquote type="cite"><div dir="ltr"><div><font class="Apple-style-span" color="#000000">I usually don't use this command line with the range method. </font></div></div></blockquote><div><br></div><br><blockquote type="cite"><div dir="ltr"><div>Thanks. <br clear="all"><div><br></div>-- <br>Karr </div></div> _______</blockquote><div><br></div><div><br></div><div><br></div>Hope this helps a bit</div><div><br></div><div>Thibault <br><blockquote type="cite">________________________________________<br>Gate-users mailing list<br><a href="mailto:Gate-users@lists.opengatecollaboration.org">Gate-users@lists.opengatecollaboration.org</a><br>http://lists.opengatecollaboration.org/mailman/listinfo/gate-users</blockquote></div><br></div></div></body></html>