Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems

Abstract Background To implement a tangential treatment technique for whole breast irradiation using the Varian Halcyon and to compare it with Elekta Synergy Agility plans. Methods For 20 patients two comparable treatment plans with respect to dose coverage and normal tissue sparing were generated....

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Autores principales:	Anne Richter, Sonja Wegener, Kathrin Breuer, Gary Razinskas, Stefan Weick, Florian Exner, Klaus Bratengeier, Michael Flentje, Otto Sauer, Bülent Polat
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Whole breast irradiation Halcyon IGRT Dose to OARs Medical physics. Medical radiology. Nuclear medicine R895-920 Neoplasms. Tumors. Oncology. Including cancer and carcinogens RC254-282
Acceso en línea:	https://doaj.org/article/7b65f004c87240f1952754e3729a8009
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spelling	oai:doaj.org-article:7b65f004c87240f1952754e3729a80092021-11-08T10:44:59ZComparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems10.1186/s13014-021-01942-y1748-717Xhttps://doaj.org/article/7b65f004c87240f1952754e3729a80092021-11-01T00:00:00Zhttps://doi.org/10.1186/s13014-021-01942-yhttps://doaj.org/toc/1748-717XAbstract Background To implement a tangential treatment technique for whole breast irradiation using the Varian Halcyon and to compare it with Elekta Synergy Agility plans. Methods For 20 patients two comparable treatment plans with respect to dose coverage and normal tissue sparing were generated. Tangential field-in-field treatment plans (Pinnacle/Synergy) were replanned using the sliding window technique (Eclipse/Halcyon). Plan specific QA was performed using the portal Dosimetry and the ArcCHECK phantom. Imaging and treatment dose were evaluated for treatment delivery on both systems using a modified CIRS Phantom. Results The mean number of monitor units for a fraction dose of 2.67 Gy was 515 MUs and 260 MUs for Halcyon and Synergy Agility plans, respectively. The homogeneity index and dose coverage were similar for both treatment units. The plan specific QA showed good agreement between measured and calculated plans. All Halcyon plans passed portal dosimetry QA (3%/2 mm) with 100% points passing and ArcCheck QA (3%/2 mm) with 99.5%. Measurement of the cumulated treatment and imaging dose with the CIRS phantom resulted in lower dose to the contralateral breast for the Halcyon plans. Conclusions For the Varian Halcyon a plan quality similar to the Elekta Synergy device was achieved. For the Halcyon plans the dose contribution from the treatment fields to the contralateral breast was even lower due to less interleaf transmission of the Halcyon MLC and a lower contribution of scattered dose from the collimator system.Anne RichterSonja WegenerKathrin BreuerGary RazinskasStefan WeickFlorian ExnerKlaus BratengeierMichael FlentjeOtto SauerBülent PolatBMCarticleWhole breast irradiationHalcyonIGRTDose to OARsMedical physics. Medical radiology. Nuclear medicineR895-920Neoplasms. Tumors. Oncology. Including cancer and carcinogensRC254-282ENRadiation Oncology, Vol 16, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Whole breast irradiation Halcyon IGRT Dose to OARs Medical physics. Medical radiology. Nuclear medicine R895-920 Neoplasms. Tumors. Oncology. Including cancer and carcinogens RC254-282
spellingShingle	Whole breast irradiation Halcyon IGRT Dose to OARs Medical physics. Medical radiology. Nuclear medicine R895-920 Neoplasms. Tumors. Oncology. Including cancer and carcinogens RC254-282 Anne Richter Sonja Wegener Kathrin Breuer Gary Razinskas Stefan Weick Florian Exner Klaus Bratengeier Michael Flentje Otto Sauer Bülent Polat Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems
description	Abstract Background To implement a tangential treatment technique for whole breast irradiation using the Varian Halcyon and to compare it with Elekta Synergy Agility plans. Methods For 20 patients two comparable treatment plans with respect to dose coverage and normal tissue sparing were generated. Tangential field-in-field treatment plans (Pinnacle/Synergy) were replanned using the sliding window technique (Eclipse/Halcyon). Plan specific QA was performed using the portal Dosimetry and the ArcCHECK phantom. Imaging and treatment dose were evaluated for treatment delivery on both systems using a modified CIRS Phantom. Results The mean number of monitor units for a fraction dose of 2.67 Gy was 515 MUs and 260 MUs for Halcyon and Synergy Agility plans, respectively. The homogeneity index and dose coverage were similar for both treatment units. The plan specific QA showed good agreement between measured and calculated plans. All Halcyon plans passed portal dosimetry QA (3%/2 mm) with 100% points passing and ArcCheck QA (3%/2 mm) with 99.5%. Measurement of the cumulated treatment and imaging dose with the CIRS phantom resulted in lower dose to the contralateral breast for the Halcyon plans. Conclusions For the Varian Halcyon a plan quality similar to the Elekta Synergy device was achieved. For the Halcyon plans the dose contribution from the treatment fields to the contralateral breast was even lower due to less interleaf transmission of the Halcyon MLC and a lower contribution of scattered dose from the collimator system.
format	article
author	Anne Richter Sonja Wegener Kathrin Breuer Gary Razinskas Stefan Weick Florian Exner Klaus Bratengeier Michael Flentje Otto Sauer Bülent Polat
author_facet	Anne Richter Sonja Wegener Kathrin Breuer Gary Razinskas Stefan Weick Florian Exner Klaus Bratengeier Michael Flentje Otto Sauer Bülent Polat
author_sort	Anne Richter
title	Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems
title_short	Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems
title_full	Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems
title_fullStr	Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems
title_full_unstemmed	Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems
title_sort	comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the halcyon and synergy agility systems
publisher	BMC
publishDate	2021
url	https://doaj.org/article/7b65f004c87240f1952754e3729a8009
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Comparison of sliding window and field-in-field techniques for tangential whole breast irradiation using the Halcyon and Synergy Agility systems

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