Hello Gate users.<div><br></div><div>I am trying to simulate the isotope of Technetium-99m for a pet dose study. I am in injecting some activity of this technetium into a tumor. After analysis of the run, i noticed that the energy were a little be high and hence higher dose. I suspect that it is not using the correct energy spectrum. How can i figure out the enery spectrum that Gate/geant4 is using for this isotope/ion source? </div>
<div><br></div><div>The Technetium is defined as an ion source.</div><div><div>#=====================================================</div><div># Source - Technetium-99m (99m-Tc)</div><div>#=====================================================</div>
<div>/gate/source/addSource sourceTc99m </div><div>/gate/source/sourceTc99m/gps/particle ion </div><div>/gate/source/sourceTc99m/gps/ion 43 99 0 143</div><div>/gate/source/sourceTc99m/gps/energytype Mono</div>
<div>/gate/source/sourceTc99m/gps/monoenergy 0. MeV</div><div>/gate/source/sourceTc99m/setForcedUnstableFlag true </div><div>/gate/source/sourceTc99m/setForcedHalfLife 21621 s</div><div>/gate/source/sourceTc99m/setActivity 37000000 Bq</div>
<div>/gate/source/sourceTc99m/gps/type Volume </div><div>/gate/source/sourceTc99m/gps/shape Sphere </div><div>/gate/source/sourceTc99m/gps/radius 0.5 cm</div><div>/gate/source/sourceTc99m/gps/centre 0 0 0 cm </div>
<div>/gate/source/sourceTc99m/attachTo tumor </div><div>/gate/source/sourceTc99m/gps/angtype iso </div><div>/gate/source/list</div><div><br></div><div>I am using the latest Gate version Gate_v6.2</div>
<div><br></div><div>Any help is greatly appreciated. </div><div><br></div>-- <br>Karr<br>
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