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Dosimetric advantages of proton therapy over conventional radiotherapy with photons in young patients and adults with low-grade glioma.
Strahlenther. Onkol. 192, 759-769 (2016)
Background and purpose: Low-grade glioma (LGG) is a very common brain tumor in pediatric patients typically associated with a very good prognosis. This prognosis makes it imperative that the risk of long-term treatment-related side effects be kept at an absolute minimum. Proton therapy (PRT) provides a radiation technique that has the potential to further reduce the genesis of radiogenic impairment. Materials and methods: We retrospectively assessed 74 patients with LGG who underwent PRT. Conventional three-dimensional photon and PRT plans were generated after contouring structures of neurogenesis, crucial neuronal structures, and areas susceptible to secondary malignancies. Target volume coverage was evaluated using the homogeneity index (HI) and inhomogeneity coefficient (IC). Results were compared using the Wilcoxon-signed rank test, with p < 0.05 being statistically significant. Results: Target volume coverage was comparable for the photon and proton plans. Overall, we could show an essential reduction in maximal, mean, and integral doses in critical neurologic structures, areas of neurogenesis, and structures of neurocognitive function. The study indicated specifically how contralaterally located structures could be spared with PRT. Conclusion: PRT is a highly conformal radiation technique offering superior dosimetric advantages over conventional radiotherapy by allowing significant dose reduction for organs at risk (OAR) that are essential for neurologic function, neurocognition, and quality of life, thus demonstrating the potential of this technique for minimizing long-term sequelae.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Brain Tumors; Conformal Radiation-therapy; Brain-tumors; Subventricular Zone; Cognitive Function; Oncologists Guide; Cell Niches; Children; System; Cancer; Hippocampus
ISSN (print) / ISBN
0179-7158
e-ISSN
1439-099X
Quellenangaben
Volume: 192,
Issue: 11,
Pages: 759-769
Publisher
Urban & Vogel
Publishing Place
Munich
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Radiation Medicine (IRM)