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Erschienen in: Strahlentherapie und Onkologie 6/2021

31.03.2021 | Original Article

Dosimetric comparison of volumetric modulated arc therapy (VMAT) and high-dose-rate brachytherapy (HDR-BT) for superficial skin irradiation with significant curvature in one or more planes

verfasst von: Rachel J. Wills, Gerry Lowe, Caroline L. Jones, Peter J. Hoskin

Erschienen in: Strahlentherapie und Onkologie | Ausgabe 6/2021

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Abstract

Purpose

This study compares the plan quality of high-dose-rate brachytherapy (HDR-BT) and volumetric modulated arc therapy (VMAT) for superficial irradiation of large areas of skin with significant curvature in one or more planes.

Methods

A total of 14 patients from two centres previously treated with either HDR-BT or VMAT were retrospectively replanned using the alternative technique. Sites included scalp and lower limbs. Identical computed tomography (CT) scans, clinical target volume (CTV) and organs at risk (OARs) and prescription were used for both techniques. Conformity, skin surface dose and OAR doses were compared.

Results

Conformity index was consistently better with VMAT than HDR-BT (p < 0.01). Maximum skin surface dose (D0.1cc) had a higher mean of 49.6 Gy with HDR-BT compared to 31.4 Gy for VMAT (p < 0.01). Significantly smaller volumes of healthy tissue were irradiated with VMAT than with HDR-BT. This can be seen in brain volumes receiving 10, 20 and 30 Gy EQD2 and in extremities receiving 5 and 10 Gy. When close to the volume, the lens received significantly lower doses with VMAT (p < 0.01).

Conclusion

In this small sample, VMAT gives equal coverage with lower OAR and skin surface doses than HDR-BT for both scalp and extremities. VMAT is a useful technique for treating large, superficial volumes with significant curvature in one or more planes.
Literatur
8.
Zurück zum Zitat Joiner MC, Bentzen SM (2002) Chapter 12: Time-dose relationships: the linear quadratic approach. In: Steel G (ed) Basic Clinical Radiobiology, 3rd edn. Hodder Arnold, London, pp 120–133 Joiner MC, Bentzen SM (2002) Chapter 12: Time-dose relationships: the linear quadratic approach. In: Steel G (ed) Basic Clinical Radiobiology, 3rd edn. Hodder Arnold, London, pp 120–133
19.
Zurück zum Zitat Ho Song J, Jung J‑Y, Hyung-Wook P et al (2015) Dosimetric comparison of three different treatment modalities for total scalp irradiation: the conventional lateral photon-electron technique, helical tomotherapy, and volumetric-modulated arc therapy. J Radiat Res 56:717–726. https://doi.org/10.1093/jrr/rru049CrossRef Ho Song J, Jung J‑Y, Hyung-Wook P et al (2015) Dosimetric comparison of three different treatment modalities for total scalp irradiation: the conventional lateral photon-electron technique, helical tomotherapy, and volumetric-modulated arc therapy. J Radiat Res 56:717–726. https://​doi.​org/​10.​1093/​jrr/​rru049CrossRef
27.
Zurück zum Zitat Beaulieu L, Carlsson Tedgren A, Carrier JF et al (2012) Report of the Task Group 186 on model-based dose calculation methods in brachytherapy beyond the TG-43 formalism: current status and recommendations for clinical implementation. Med Phys 39:6208–6236. https://doi.org/10.1118/1.4747264CrossRefPubMed Beaulieu L, Carlsson Tedgren A, Carrier JF et al (2012) Report of the Task Group 186 on model-based dose calculation methods in brachytherapy beyond the TG-43 formalism: current status and recommendations for clinical implementation. Med Phys 39:6208–6236. https://​doi.​org/​10.​1118/​1.​4747264CrossRefPubMed
Metadaten
Titel
Dosimetric comparison of volumetric modulated arc therapy (VMAT) and high-dose-rate brachytherapy (HDR-BT) for superficial skin irradiation with significant curvature in one or more planes
verfasst von
Rachel J. Wills
Gerry Lowe
Caroline L. Jones
Peter J. Hoskin
Publikationsdatum
31.03.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
Strahlentherapie und Onkologie / Ausgabe 6/2021
Print ISSN: 0179-7158
Elektronische ISSN: 1439-099X
DOI
https://doi.org/10.1007/s00066-021-01759-4

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