<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>HI Juan Camilo, </div><div><br></div><div>I cant' find the example you're referring at.... However you're right : </div><div><br></div><div>First column corresponds to energy in MeV and second to the intensity. </div><div><br></div><div><br></div><div>But you should be very careful when using histograms since your data may represent either density probability (definition at a particular point of the distribution) or cumulated "counts" in bins. </div><div>As far as I know, GATE automatically extrapolate the energy distribution between 2 values that are entered in the histogram. That means your histogram is never discrete. </div><div><br></div><div>This is fine for continuous energy distribution, such as ß- emission from 131-I, that can be described by density probability. You should therefore use : </div><div><div>[prefix]/energytype Arb</div><div>[prefix]/histname arb</div><div><br></div><div>and (just a example of few points for ß)</div><div><br></div><div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.07000<span class="Apple-tab-span" style="white-space:pre"> </span>3.209</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.07500<span class="Apple-tab-span" style="white-space:pre"> </span>3.185</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.08000<span class="Apple-tab-span" style="white-space:pre"> </span>3.161</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.08500<span class="Apple-tab-span" style="white-space:pre"> </span>3.136</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.09000<span class="Apple-tab-span" style="white-space:pre"> </span>3.11</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.10000<span class="Apple-tab-span" style="white-space:pre"> </span>3.055</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.11000<span class="Apple-tab-span" style="white-space:pre"> </span>2.999</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.12000<span class="Apple-tab-span" style="white-space:pre"> </span>2.939</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.13000<span class="Apple-tab-span" style="white-space:pre"> </span>2.877</div><div>/gate/source/betaminus/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>0.14000<span class="Apple-tab-span" style="white-space:pre"> </span>2.812</div></div><div><br></div><div><br></div><div><div>But for mono-energetic photon and electron emissions,the only way (at least i know) to define a discrete distribution is to create "dummy values" set to zero in between. This will force the histogram to zero between 2 emission energies. In that case you should use : </div></div></div><div><br></div><div>[prefix]/energytype User</div><div><div>[prefix]/histname energy</div></div><div><br></div><div>and (this is again just an example taken for 3 gamma rays, including the main one)</div><div><br></div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>3.58400E-01<span class="Apple-tab-span" style="white-space:pre"> </span>0</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>3.58400E-01<span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span>1.63400E-04</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>3.58400E-01<span class="Apple-tab-span" style="white-space:pre"> </span>0</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>3.64489E-01<span class="Apple-tab-span" style="white-space:pre"> </span>0</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>3.64489E-01<span class="Apple-tab-span" style="white-space:pre"> </span>8.17000E-01</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>3.64489E-01<span class="Apple-tab-span" style="white-space:pre"> </span>0</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>4.04814E-01<span class="Apple-tab-span" style="white-space:pre"> </span>0</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>4.04814E-01<span class="Apple-tab-span" style="white-space:pre"> </span>5.47390E-04</div><div>/gate/source/mono_ph/gps/histpoint<span class="Apple-tab-span" style="white-space:pre"> </span>4.04814E-01<span class="Apple-tab-span" style="white-space:pre"> </span>0</div><div> </div><div>Now, as far as the comparison of the values is concerned, if you can tell me which example you use, we may be able to give you more info. </div><div>I use data from MIRD (Eckerman KF, Endo A. MIRD:Radionuclide Data and Decay Schemes Society
for Nuclear Medicine;; 2008) as you also seem to do, but had similar results with RADAR (<span lang="EN-US">Stabin MG, da Luz LC. Decay
data for internal and external dose assessment. Health Phys. Oct 2002;83(4):471-475.). Data from nudat2 are also fine. </span></div><div><span lang="EN-US"><br></span></div><div><span lang="EN-US">For beta distribution, the only thing you need to be careful with is, again, whether you're dealing with intensity defined in cumulated bin values or density probabilities. </span></div><div><span lang="EN-US"><br></span></div><div><span lang="EN-US">I hope this helps :) </span></div><div><br></div><div>If i remember correctly, you'll also find some answers for your problem in user list archives.</div><div><br></div><div>Good luck !</div><div><br></div><div>Thibault </div><div><br></div><div><br></div><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div><div>INSERM UMR 1037</div>Cancer Research Cancer - Toulouse, France <br>Faculté de Médecine de Toulouse-Rangueil<br>Biophysique - Bâtiment A3<br>133 route de Narbonne<br>31062 Toulouse<br>Tel: <span class="Apple-tab-span" style="white-space: pre; "> </span> <span class="Apple-tab-span" style="white-space: pre; "> </span>05 62 88 90 81<div>Port : <span class="Apple-tab-span" style="white-space: pre; "> </span>06 29 53 50 77<br><div>Mail: <a href="mailto:manuel.bardies@inserm.fr">thibault.mauxion@inserm.fr</a></div></div></div><div><br></div></span>
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<div><div>Le 8 oct. 2012 à 22:56, juan camilo bedoya tobon a écrit :</div><br class="Apple-interchange-newline"><blockquote type="cite">Good afternoon.<div><br></div><div>My name is Juan Camilo Bedoya, in the moment i am realizing a simulation of the source de 131 I, I was watching the example of internal dosimetry; but i do not undestand how to build a source type histogram.</div>
<div><br></div><div><br></div><div>I think, thqt the fist column represente te energy en Mv and the second the intensity in %, but when i compare the example with the spectrun en la nist (<a href="http://www.nndc.bnl.gov/nudat2/">http://www.nndc.bnl.gov/nudat2/</a>), are totally diferent.</div>
<div><br></div><div><br></div><div>Because the reason, i write the present mail, for ask how to build the source and and where to get the data, because I have the MIRD.</div><div><br></div><div><div>I also would like to know if anyone has the MIRD 2008 to pay me.</div>
<div><br></div><div>I hope someone can help me.</div></div><div><br></div><div><br></div>
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