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Title
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The influence of the use of CT-planning on the irradiated boost volume in breast conserving treatment
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Author
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Abstract
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| Background and purpose: The purpose of this study was to investigate the effect of CT-based delineation and planning on the irradiated boost volume. For this specific purpose we used the data as derived from 2 prospective phase III randomised trials. Patients and methods: Data from 1331 patients (<= 50 years) were analyzed with a reported boost Volume from a simulation-based treatment plan (EORTC boost vs no boost trial, n = 922), and a CT-scan-based treatment plan (Young Boost Trial, it = 409) group. Tumour diameter, irradiation technique (photons vs electrons), lumpectomy size, and age were used as covariates. Results: Median V(95%) in the conventional simulation-based treatment plans was 99 cc (range 9-628) for photons and was 98 cc (13-651) for electrons, whereas in the CT-planned patients, these figures were 178 cc (37-2699) and 150 cc (43-1272), respectively. Multivariable analysis showed an association of the it-radiated boost volume with tumour size (p < 0.0067), lumpectomy size (p < 0.0002), and boost technique (p < 0.0004). The use of a CT-scan for volume delineation and treatment planning remained significant (p < 0.0001). Conclusions: The use of a CT-scan for delineation and treatment planning led to a significant increase of the irradiated boost volume by a factor of 1.5-1.8, compared to conventional simulator-based plans. (C) 2009 Elsevier Ireland Ltd. All rights reserved. Radiotherapy and Oncology 93 (2009) 87-93 |
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Language
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English
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Source (journal)
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Radiotherapy and oncology. - Amsterdam
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Publication
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Amsterdam
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2009
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ISSN
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0167-8140
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DOI
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10.1016/J.RADONC.2009.05.002
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Volume/pages
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93
:1
(2009)
, p. 87-93
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ISI
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000271046500014
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Pubmed ID
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19515444
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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