<div dir="ltr"><img class="mailtrack-img" alt="" style="display:flex" src="https://mailtrack.io/trace/mail/67497fa5cc0cae3dbdfa36141f4e6a12ebb961df.png?u=3054344" width="0" height="0"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div></div><div><b>Hi Dear Gate User</b></div><div><b><br></b></div><div><b>I simulated a medical linac and calculated dose in a voxelized phantom (h33,i33 format of Rando Phantom) with the dose actor which I written below<br></b></div><div><br></div><div style="text-align:left">/gate/actor/addActor DoseActor meshdose<br>/gate/actor/meshdose/save output1/Randodose.hdr<br>/gate/actor/meshdose/attachTo phantom<br>/gate/actor/meshdose/stepHitType random<br>/gate/actor/meshdose/setSize 652 362 872 mm<br>#/gate/actor/meshdose/setResolution 326 181 436<br>/gate/actor/meshdose/setVoxelSize 2 2 2 mm <br>/gate/actor/meshdose/enableEdep true<br>/gate/actor/meshdose/enableUncertaintyEdep true<br>/gate/actor/meshdose/enableSquaredEdep true<br>/gate/actor/meshdose/enableDose true<br>/gate/actor/meshdose/enableUncertaintyDose true<br>/gate/actor/meshdose/enableSquaredDose true<br>/gate/actor/meshdose/saveEveryNSeconds 60</div><div></div><div><br></div><div><b>I want to convert dose in each voxel to Gy. <br></b></div><div><b>As I read in Gate Manual the dose in voxel should be in Gy.</b><br></div><div>""The output file is a binary file (number format is 4 bytes float)
containing the absorbed dose in cGy. It has the same dimensions as the
phantom. The output module optionally writes a second binary file
containing the uncertainty on absorbed dose expressed as a fraction between 0 and 1.""<b> <br></b></div><div><b>but the numbers which I obtained for each voxel inside fields and outside fields are in orders of 10 to power of -5 and 10 to power of -7, respectively. based on the number it should not be in Gy!!! So I want to convert them to Gy and compare them with the TPS result for inside fields voxels..</b></div><div><b>My first question is: what is that number? Dose per incident Particle?!!! If yes, Why they increased with increase in the number of primary particle! even after reduce the dose uncertainty to near zero<br></b></div><div><b> If the number of hit effect the number for each voxel, how I should calculate them and how I should effect them in my conversion to Gy???<br></b></div><div><b>Then: How I can convert them to Gy? <br></b></div><div><b>I found the below article and thesis for this conversion but both of them works with EGSnrc. the number in each voxel in this code are dose per incident voxel.<br></b></div><div>Francescon P, Cavedon C, Reccanello S and Cora S 2000 Medical Physics 27(7), 1579–1587.<b><br></b></div><div>Monte Carlo Treatment Planning for Advanced Radiotherapy. Chapter 5, Cronholm, Rickard; F. Behrens, Claus; Helt-Hansen, Jakob; E. Andersen, Claus<b><br></b></div><div><b></b></div><div><b>I will be thankful if someone have experience in this issue and help me.</b></div><div><b><br></b></div><div><b>Best regards</b></div><div><b>Mery<br></b></div><div><b><br></b></div><div><b><br></b></div><div><b><br></b></div><div><br></div><div><br></div><div><br><br><br></div></div></div></div></div></div><div class="mt-signature">
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