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A Monte Carlo simulation-based decision support system for radiation oncologists in the treatment of glioblastoma multiforme

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Abstract

In the present research, we have developed a model-based crisp logic function statistical classifier decision support system supplemented with treatment planning systems for radiation oncologists in the treatment of glioblastoma multiforme (GBM). This system is based on Monte Carlo radiation transport simulation and it recreates visualization of treatment environments on mathematical anthropomorphic brain (MAB) phantoms. Energy deposition within tumour tissue and normal tissues are graded by quality audit factors which ensure planned dose delivery to tumour site thereby minimising damages to healthy tissues. The proposed novel methodology predicts tumour growth response to radiation therapy from a patient-specific medicine quality audit perspective. Validation of the study was achieved by recreating thirty-eight patient-specific mathematical anthropomorphic brain phantoms of treatment environments by taking into consideration density variation and composition of brain tissues. Dose computations accomplished through water phantom, tissue-equivalent head phantoms are neither cost-effective, nor patient-specific customized and is often less accurate. The above-highlighted drawbacks can be overcome by using open-source Electron Gamma Shower (EGSnrc) software and clinical case reports for MAB phantom synthesis which would result in accurate dosimetry with due consideration to the time factors. Considerable dose deviations occur at the tumour site for environments with intraventricular glioblastoma, haematoma, abscess, trapped air and cranial flaps leading to quality factors with a lower logic value of 0. Logic value of 1 depicts higher dose deposition within healthy tissues and also leptomeninges for majority of the environments which results in radiation-induced laceration.

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Availability of data and material

CT scan data, Peptide atlas protein sequence data, PubChem, Medical case reports, Biochemistry assays of tumours, IAEA atomic and molecular data for radiotherapy research, NIST physical Measurements laboratory ESTAR program for stopping power range of electrons and EGSnrc open source radiation transport software.

Code availability

Self developed C and FORTRAN codes used for EGSnrc open source software and NIST data.

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Acknowledgements

Thanks to Regional cancer center, Thiruvananthapuram, India and Institute of Medical Sciences – BHU, Varanasi, India for providing moral support.

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Authors and Affiliations

Authors

Contributions

Developing mathematical models based on collected CT scan data and works of literature. Material/tissue of brain part synthesised using NIST data for extracting excitation energy and density correction files. Material /tissues recreated on Monte Carlo EGSnrc platform from the above-compiled outputs and NIST codes. Program coding in EGSnrc performed for irradiation each MAB phantom with 6 MV photon beams. Complied outputs in the format of scattered and total doses to generate a Pareto charts for classification.

Corresponding author

Correspondence to C. Praveen Kumar.

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The authors declare that they have no conflict of interest.

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Supplementary Information

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Supplementaryfile1 (DOCX 914 KB)

Appendices

Appendix 1: PDD deviations in each brain layer/tissue/material for treatment environments GBM 1 to GBM 38

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Appendix 2: Collision, Radiative and Total stopping powers of brain layers/tissues within the MAB Phantom

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Praveen Kumar, C., Aggarwal, L.M., Bhasi, S. et al. A Monte Carlo simulation-based decision support system for radiation oncologists in the treatment of glioblastoma multiforme. Radiat Environ Biophys 63, 215–262 (2024). https://doi.org/10.1007/s00411-024-01065-4

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  • DOI: https://doi.org/10.1007/s00411-024-01065-4

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