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Mast M, Leong A, Korreman S, Lee G, Probst H, Scherer P, Tsang Y. ESTRO-ACROP guideline for positioning, immobilisation and setup verification for local and loco-regional photon breast cancer irradiation. Tech Innov Patient Support Radiat Oncol 2023; 28:100219. [PMID: 37745181 PMCID: PMC10511493 DOI: 10.1016/j.tipsro.2023.100219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 09/10/2023] [Indexed: 09/26/2023] Open
Affiliation(s)
- M.E. Mast
- Department of Radiation Oncology, Haaglanden Medical Center, Leidschendam, The Netherlands
| | - A. Leong
- Department of Radiation Therapy, University of Otago, Wellington, New Zealand
- Bowen Icon Cancer Centre, Wellington, New Zealand
| | - S.S. Korreman
- Department of Clinical Medicine, Aarhus University, Denmark
- Department of Oncology, Aarhus University Hospital, Denmark
- Danish Center for Particle Therapy, Aarhus University Hospital, Denmark
| | - G. Lee
- Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
| | - H. Probst
- Sheffield Hallam University, Sheffield, United Kingdom
| | - P. Scherer
- Department of Radiotherapy and Radio-Oncology, LKH Salzburg, Paracelsus Medical University Clinics, Salzburg, Austria
| | - Y. Tsang
- Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
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As Easy as 1, 2, 3? How to Determine CBCT Frequency in Adjuvant Breast Radiotherapy. Cancers (Basel) 2022; 14:cancers14174164. [PMID: 36077701 PMCID: PMC9454766 DOI: 10.3390/cancers14174164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/17/2022] Open
Abstract
The current study aims to assess the suitability of setup errors during the first three treatment fractions to determine cone-beam computed tomography (CBCT) frequency in adjuvant breast radiotherapy. For this, 45 breast cancer patients receiving non-hypofractionated radiotherapy after lumpectomy, including a simultaneous integrated boost (SIB) to the tumor bed and daily CBCT imaging, were retrospectively selected. In a first step, mean and maximum setup errors on treatment days 1–3 were correlated with the mean setup errors during subsequent treatment days. In a second step, dose distribution was estimated using a dose accumulation workflow based on deformable image registration, and setup errors on treatment days 1–3 were correlated with dose deviations in the clinical target volumes (CTV) and organs at risk (OAR). No significant correlation was found between mean and maximum setup errors on treatment days 1–3 and mean setup errors during subsequent treatment days. In addition, mean and maximum setup errors on treatment days 1–3 correlated poorly with dose coverage of the CTVs and dose to the OARs. Thus, CBCT frequency in adjuvant breast radiotherapy should not be determined solely based on the magnitude of setup errors during the first three treatment fractions.
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