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Evaluation of helical tomotherapy as an alternative for left-sided breast cancer patients not compliant with deep inspiration breath hold.
Kuru, Okan; Ozan Goksel, Evren; Volkan Demircan, Niyazi; Sengoz, Meric.
Afiliación
  • Kuru O; Eastern Mediterranean University, School of Health Services, Radiotherapy Program, Famagusta, North Cyprus, via Mersin 10, Turkey.
  • Ozan Goksel E; Acibadem MAA University, Vocational School of Health Services, Radiotherapy Program, Istanbul, Turkey.
  • Volkan Demircan N; Bahcesehir University Hospital, Medical Park Goztepe, Department of Radiation Oncology, Istanbul, Turkey.
  • Sengoz M; Acibadem Altunizade Hospital, Department of Radiation Oncology, Istanbul, Turkey.
Tech Innov Patient Support Radiat Oncol ; 31: 100268, 2024 Sep.
Article en En | MEDLINE | ID: mdl-39247163
ABSTRACT

Purpose:

The aim of this study is to investigate, from a dosimetric perspective, whether helical Tomotherapy (HT) during free breathing (FB) can serve as an alternative technique for treating left-sided breast cancer patients who are unable to comply with the deep inspiration breath hold (DIBH) technique. Material and

Methods:

For this purpose, the CT images of 20 left breast-only cancer patients acquired in both FB and DIBH phases were utilized. The left breast was contoured as the target volume, while the heart, LAD, ipsilateral and contralateral lungs, and contralateral breast were contoured as organs at risk on the CT images obtained in both DIBH and FB. Planning with the volumetric modulated arc therapy (VMAT) technique was performed on the CT scans obtained in the DIBH (VMAT-DIBH), while planning with the HT technique was carried out on the CT scans obtained in the FB (HT-FB). Subsequently, dosimetric comparison of the plans were done in terms of target coverage and preservation of normal tissues.

Results:

Both techniques achieved the desired target coverage; however, in terms of D2, Vpres values, Conformity Number (CN), and Homogeneity Index (HI), the HT-FB technique was found to be superior. While the mean doses to the heart were similar for both techniques, doses to the LAD and left lung were found to be superior in plans generated with the HT-FB technique. When compared in terms of contralateral breast and right lung protection, VMAT-DIBH technique was found to be significantly superior.

Conclusion:

The treatment of left breast-only patients with the HT-FB technique has been observed to provide similar heart protection and better LAD and ipsilateral lung protection compared to the VMAT-DIBH technique without compromising target coverage. However, when the HT-FB technique is used, doses to the contralateral lung and contralateral breast should be carefully evaluated.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Tech Innov Patient Support Radiat Oncol Año: 2024 Tipo del documento: Article País de afiliación: Turquía Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Tech Innov Patient Support Radiat Oncol Año: 2024 Tipo del documento: Article País de afiliación: Turquía Pais de publicación: Reino Unido