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Published on: September 4, 2017
Dosimetric validation of a redundant independent calculation software for VMAT fields
F Mata Colodro1, A Serna Berná, V Puchades Puchades
1Department of Medical Physics, Hospital Universitario Santa Lucia, Cartagena, Spain. jfmata@gmail.com
Summary
Redundant independent dosimetric calculation (RIDC) software was validated for Volumetric Modulated Arc Therapy (VMAT) quality assurance. Diamond software accurately verified VMAT plans against experimental measurements and treatment planning systems.
Area of Science:
- Medical Physics
- Radiation Oncology
- Radiotherapy Quality Assurance
Background:
- Redundant independent dosimetric calculation (RIDC) is crucial for 3D conventional radiotherapy QA.
- The rise of intensity-modulated treatments increases QA workflow demands.
- Diamond software offers RIDC for Volumetric Modulated Arc Therapy (VMAT) fields.
Purpose of the Study:
- To demonstrate a procedure for validating the Diamond RIDC software's calculation algorithm for VMAT.
- To assess the accuracy of Diamond software in VMAT QA.
Main Methods:
- Validated Diamond software using a plastic slab phantom for 3D conventional fields, comparing calculations against experimental measures and the Eclipse treatment planning system (TPS).
- Validated VMAT plans using a homogeneous cylindrical phantom, comparing Diamond calculations against experimental measurements and TPS calculations for 59 VMAT plans.
Main Results:
- For 3D conventional fields, Diamond showed an average deviation of -0.1 ± 0.7% (1SD) versus measurements and 0.4 ± 0.8% (1SD) versus Eclipse TPS.
- For VMAT plans, Diamond demonstrated an average deviation of -0.2 ± 1.7% (1SD) versus measurements and 0.0 ± 1.6% (1SD) versus TPS calculations.
Conclusions:
- The validation procedure confirms the accuracy of the Diamond calculation algorithm.
- Diamond software is validated as a reliable tool for VMAT QA and verifications.
