Training courses
Example of 3D and EPID Dosimetry Calculations
All machine data and model generation must be computed prior to performing patient calculations. The benefit of this example is that the user is able to experience the different scenarios that one would encounter when starting when implementing 3D and EPID licensing.
This example does not cover errors that are made during the machine configuration besides the MLC parameter optimization. The recommendation is for Technical Support to perform the machine configuration in order to avoid errors and loss of time. Machine data configuration is included with your purchase for two machines.
We will go through 3DCC, 3DMC, our 3D EPID Dosimetry Pre-Treatment and in-vivo solutions for end-to-end patient specific QA!
Configuring the MLC parameters correctly is the most important step
As covered in this video and references, the MLC parameters affect the computed dose by a significant factor. It is recommended that the user has validated their TPS model and that measurements are taken to correlate the results of RadCalc's 3D modules, as highlighted in TG-219. This is discussed in the following video:
Example 1: Collapsed Cone and MLC optimization example (also applies to fMC)
Example 2: BEAMnrc Monte Carlo and MLC optimization example
Example 3: Pre-treatment ‘in air’ example”
Example 4: In vivo dosimetry example using VMAT with discussion on kernel creation
References:
- Report of AAPM Task Group 219 on independent calculation-based dose/MU verification for IMRT
- Sensitivity of IROC phantom performance to radiotherapy treatment planning system beam modeling parameters based on community‐driven data
- Photon beam modeling variations predict errors in IMRT dosimetry audits