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e0404 / photonPencilBeamKernelCalc

Set of Matlab functions computing the convolution kernels for a singular-value-decomposed pencil beam dose calculation algorithm
MIT License
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photon primary fluence #9

Open mali17 opened 3 months ago

mali17 commented 3 months ago

Hi, Can you help me how to get photon primary fluence data? and if these values can be theoretically calculated, please provide a detailed explanation. thank you.

edwardwang1 commented 3 months ago

Hello,

Based on this paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9797178/ we have interpreted the primary fluence as the diagonal crossbeam profile. I believe the authors of the paper and the original matRad developers physically measured the primary fluence.

In our case, we used a combination of our machine commissioning data as well as measurements made (virtually) in our treatment planning software (Eclipse).

mali17 commented 3 months ago

@edwardwang1 thank you so much.

alihaitham1987 commented 2 months ago

Hi @edwardwang1, Thank you for your insights on measuring primary fluence. Could you elaborate on the specific methods you used or provide any references or resources that illustrate how to measure primary fluence?

edwardwang1 commented 2 months ago

I'm not a physicist so I'm probably not the best person to ask. I believe the crossbeam profile is usually measured with an ion chamber in a water tank. For us, we used the data that was already collected during machine commissioning.

You can also supplement the data if you have the machine commissioned already in a treatment planning system. We wrote a script in Eclipse to grab the data for us.