Radiobiological Evaluation of Combined Gamma Knife Radiosurgery and Hyperthermia for Pediatric Neuro-Oncology

Autor: Morteza Ghaderi Aram, Massimiliano Zanoli, Håkan Nordström, Iuliana Toma-Dasu, Klas Blomgren, Hana Dobšíček Trefná
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Cancers, Vol 13, Iss 13, p 3277 (2021)
Druh dokumentu: article
ISSN: 2072-6694
DOI: 10.3390/cancers13133277
Popis: Combining radiotherapy (RT) with hyperthermia (HT) has been proven effective in the treatment of a wide range of tumours, but the combination of externally delivered, focused heat and stereotactic radiosurgery has never been investigated. We explore the potential of such treatment enhancement via radiobiological modelling, specifically via the linear-quadratic (LQ) model adapted to thermoradiotherapy through modulating the radiosensitivity of temperature-dependent parameters. We extend this well-established model by incorporating oxygenation effects. To illustrate the methodology, we present a clinically relevant application in pediatric oncology, which is novel in two ways. First, it deals with medulloblastoma, the most common malignant brain tumour in children, a type of brain tumour not previously reported in the literature of thermoradiotherapy studies. Second, it makes use of the Gamma Knife for the radiotherapy part, thereby being the first of its kind in this context. Quantitative metrics like the biologically effective dose (BED) and the tumour control probability (TCP) are used to assess the efficacy of the combined plan.
Databáze: Directory of Open Access Journals
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