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Journal of Neuro-Oncology

, Volume 137, Issue 2, pp 429–438 | Cite as

Clinical and dosimetric study of radiotherapy for glioblastoma: three-dimensional conformal radiotherapy versus intensity-modulated radiotherapy

  • David Thibouw
  • Gilles TrucEmail author
  • Aurélie Bertaut
  • Cédric Chevalier
  • Léone Aubignac
  • Céline Mirjolet
Clinical Study

Abstract

Background and purpose

We aimed to compare three-dimensional conformal radiotherapy (3D-CRT) with intensity-modulated radiotherapy (IMRT) for the treatment of glioblastoma.

Materials and methods

Retrospective study of 220 patients with glioblastoma, treated with 3D-CRT or IMRT, with or without surgery. Dosimetric parameters as well as clinical and survival data for the two techniques were analyzed and compared.

Results

The median conformity index was 1.53 (range 0–2.69) for 3D-CRT and 1.25 (range 0.97–2.01) for IMRT, p < 10−4. The median homogeneity index was 0.10 (range 0.03–0.32) for 3D-CRT and 0.07 (range 0.03–0.18) for IMRT, p < 10−4. There were significantly fewer acute grade 1 and 2 neurological toxicities in the IMRT group especially for edema (1.3 versus 12.4%, p = 0.017), concentration disorders (6.6 versus 19.9%, p = 0.003) and consciousness disorders (2.6 versus 13.2%, p = 0.002) although IMRT patients had a significantly worse pre-treatment neurological status than 3D-CRT patients. Median survival was 16.0 months (range 11.9–17.8) for IMRT and 13.4 months (range 11.7–15.7) for 3D-CRT patients (p = 0.542).

Conclusion

IMRT improved target conformity and reduced neurological toxicities for patients with glioblastomas.

Keywords

Glioblastoma Intensity-modulated radiation therapy 3D conformational radiation therapy Dosimetric outcomes Clinical outcomes 

Notes

Acknowledgements

We would like to thank Philip Bastable for his review and corrections of the wording in this manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

For this type of retrospective study, formal consent is not required.

Supplementary material

11060_2017_2735_MOESM1_ESM.docx (17 kb)
Supplementary material 1 (DOCX 18 kb)
11060_2017_2735_MOESM2_ESM.docx (21 kb)
Supplementary material 1 (DOCX 21 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Radiation OncologyGeorges François Leclerc Cancer CenterDijonFrance
  2. 2.Department of StatisticsGeorges François Leclerc Cancer CenterDijonFrance
  3. 3.Department of Medical PhysicsGeorges François Leclerc Cancer CenterDijonFrance

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