Dosimetric materials have been investigated in terms of calculated mass energy absorption coefficient, equivalent atomic number and KERMA (kinetic energy released per unit mass) in the energy range 0.015-15 MeV. Using analytical methodology it has verified that nylon is the best substitute dosimetric material for skin, muscle, bone and soft-tissues. Relative energy absorption buildup factors calculated by G-P fitting method confirm the findings. Nylon has been found to be good tissue substitute material for making tissue-phantoms of the biological tissues investigated.
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| http://dx.doi.org/10.1016/j.apradiso.2011.12.008 | DOI Listing |
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Impact of diaphragm motion on dosimetry in lower thoracic spine stereotactic body radiotherapy.
Phys Med
January 2025
Department of Radiation Oncology and Image-Applied Therapy, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Background And Purpose: Free-breathing computed tomography (FBCT) used in treatment planning for lower thoracic (Th8-Th12) spine stereotactic body radiotherapy (SBRT) can cause deviations between planned and irradiated doses due to diaphragm movement (DM). This study analyzed the dosimetric impact of DM on lower thoracic spine SBRT.
Materials And Methods: Data were collected from 19 patients who underwent FBCT and four-dimensional CT (4DCT) during the same session.
Effects of Institutional Experience on Plan Quality in Stereotactic Radiotherapy Using HyperArc for Brain Metastases.
In Vivo
December 2024
Department of Radiation Oncology, Osaka International Cancer Institute, Osaka, Japan.
Background/aim: HyperArc (HA) is an automated planning technique enabling single-isocenter brain stereotactic radiotherapy (SRT); however, dosimetric outcomes may be influenced by the planner's expertise. This study aimed to assess the impact of institutional experience on the plan quality of HA-SRT for both single and multiple brain metastases.
Materials And Methods: Twenty patients who underwent HA-SRT for single metastasis between 2020 and 2021 comprised the earlier group, while those treated between 2022 and 2024 constituted the later group.
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Department of Oncology, University College London Hospitals NHS Foundation Trust, 250 Euston Road, London, NW1 2PG, UK. Electronic address:
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View Article and Find Full Text PDFDosimetric Evaluation of Different Algorithms on Heterogeneous Slab Phantom Using CMS XiO and MONACO Treatment Planning System for 4MV, 6MV and 15MV Beam Energy: An Institutional Study.
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Department of Physics, Lovely Professional University, Phagwara, India.
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Development of a prediction model for tube feeding dependence in HPV-associated oropharyngeal cancer patients undergoing chemoradiotherapy.
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Radiation Medicine Program, Princess Margaret Cancer Centre, M5G 2M9, Toronto, Ontario, Canada; Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, M5G 2M9 Toronto, Ontario. Electronic address:
Objectives: This study aimed to develop a prediction model for feeding tube dependence in a large homogenous cohort of HPV-associated oropharyngeal squamous cell carcinoma (HPV + OPSCC) patients receiving chemoradiotherapy (CRT). We further aimed to externally validate three previously published feeding tube prediction models on this cohort.
Materials And Methods: p16-confirmed HPV + OPSCC patients treated with definitive CRT at a tertiary cancer centre between April 2017 and February 2022 were identified.
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