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Stereotactic body radiation therapy for prostate cancer: a dosimetric comparison of IMRT and VMAT using flattening filter and flattening filter-free beams.
El-Sayed, Sherif M; El-Gebaly, Reem H; Fathy, Mohamed M; Abdelaziz, Dina M.
Afiliación
  • El-Sayed SM; Biophysics Department, Faculty of Science, Cairo University, Giza, 12613, Egypt. sherif.mohammed@baheya.org.
  • El-Gebaly RH; Radiotherapy Department, Baheya Hospital, Giza, Egypt. sherif.mohammed@baheya.org.
  • Fathy MM; Biophysics Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.
  • Abdelaziz DM; Biophysics Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.
Radiat Environ Biophys ; 63(3): 423-431, 2024 Aug.
Article en En | MEDLINE | ID: mdl-38969869
ABSTRACT
This retrospective study was performed to evaluate plan quality and treatment delivery parameters of stereotactic body radiation therapy (SBRT) for prostate cancer. The study utilized different isocentric modulated techniques intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT) using 6 MV flattening filter (FF) and 10 MV flattening filter-free beams (FFF). Fifteen retrospective prostate cancer patients were selected for this study. Sixty plans were created with an SBRT-prescribed dose of 36.25 Gy delivered in five fractions. Planning target volume (PTV) coverage, plan quality indices, doses delivered to organs at risk (OARs), and treatment delivery parameters were compared for all plans. It turned out that VMAT plans, particularly those using the FFF beam, provided superior target conformality and a steeper dose gradient as compared to IMRT plans. Additionally, VMAT plans showed better OARs sparing compared to IMRT plans. However, IMRT plans delivered a lower maximum dose to the target than VMAT plans. Importantly, the VMAT plans resulted in reduced treatment delivery parameters, including beam on time (BOT), monitor unit (MU), and modulation factor (MF), compared to IMRT plans. Furthermore, a statistically significant difference was observed in BOT and mean body dose between FF and FFF beams, with FFF beams showing superior performance. Considering all results, VMAT using 10 MV (FFF) is suggested for treating prostate cancer patients with SBRT. This offers the fastest delivery in addition to maintaining the highest plan quality.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Neoplasias de la Próstata / Planificación de la Radioterapia Asistida por Computador / Radiocirugia / Radioterapia de Intensidad Modulada Límite: Humans / Male Idioma: En Revista: Radiat Environ Biophys Año: 2024 Tipo del documento: Article País de afiliación: Egipto Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Neoplasias de la Próstata / Planificación de la Radioterapia Asistida por Computador / Radiocirugia / Radioterapia de Intensidad Modulada Límite: Humans / Male Idioma: En Revista: Radiat Environ Biophys Año: 2024 Tipo del documento: Article País de afiliación: Egipto Pais de publicación: Alemania