Results 251 to 260 of about 1,178,335 (287)

The relative biological effectiveness of out-of-field dose

Physics in Medicine and Biology, 2016
using simulations and models derived from existing literature, this work investigates relative biological effectiveness (RBE) for out-of-field radiation and attempts to quantify the relative magnitudes of different contributing phenomena (spectral, bystander, and low dose hypersensitivity effects).
M. Balderson, B. Koger, C. Kirkby
semanticscholar   +3 more sources

Individualized evaluation of the total dose received by radiotherapy patients: Integrating in-field, out-of-field, and imaging doses.

Physica Medica
To propose a methodology for integrating the out-of-field and imaging doses to the in-field dose received by radiotherapy (RT) patients. In addition, the impact of considering the total dose in planning and radiation-induced second malignancies (RISM) risk assessment will be evaluated in several scenarios comprising photon and proton treatments.The ...
M. Romero-Expósito, B. Sánchez-Nieto, M. Riveira-Martín, M. Azizi, A. Gkavonatsiou, Isidora Muñoz, Ignacio N. López-Martínez, Ignacio Espinoza, Gabriel Zelada, Andrés Córdova-Bernhardt, O. Norrlid, C. Goldkuhl, D. Molin, Francisco Mosquera-Pena Sánchez, Antonio López-Medina, I. Toma-Dasu, A. Dasu   +16 more
semanticscholar   +4 more sources

Out-of-field mean photon energy and dose from 6 MV and 6 MV FFF beams measured with TLD-300 and TLD-100 dosimeters.

Medical Physics (Lancaster), 2021
PURPOSE To measure the out-of-field mean photon energy and dose imparted by the secondary radiation field generated by 6 MV and 6 MV FFF beams using TLD-300 and TLD-100 dosimeters and, to use the technique to quantify the contributions from the different
Víctor-Manuel López-Guadalupe, A. Rodríguez-Laguna, M. A. Poitevin-Chacón, E. López-Pineda, M. Brandan   +4 more
semanticscholar   +1 more source

Out-of-field dose measurements in a water phantom using different radiotherapy modalities

Physics in Medicine and Biology, 2012
This investigation focused on the characterization of the lateral dose fall-off following the irradiation of the target with photons, protons and carbon ions. A water phantom was irradiated with a rectangular field using photons, passively delivered protons as well as scanned protons and carbon ions. The lateral dose profile in the depth of the maximum
R. Kaděrka, Dieter Schardt, M. Durante, Thomas Berger, U. Ramm, J. Licher, C. Tessa   +6 more
semanticscholar   +4 more sources

Low dose out-of-field radiotherapy, part 1: Measurement of scattered doses

Cancer/Radiothérapie, 2017
To measure out-of-field doses in a phantom model to better quantify this radiation.The individual contribution of photons and neutrons to the total out-of-field dose for 6 MV and 20 MV photons at open beam were measured in a purpose-designed water phantom.
M, Kruszyna, S, Adamczyk, A, Skrobała, M, Skórska, W, Suchorska, K, Zaleska, A, Kowalik, W, Jackowiak, J, Malicki   +8 more
openaire   +2 more sources

Poster — Thur Eve — 36: Out‐of‐Field dose in craniospinal irradiation

Medical Physics, 2012
The risk of radiotherapy induced secondary cancer depends on the integral dose delivered to the patient where the dose delivered within the radiation field is accounted for, as well as dose to out‐of‐field organs from scattered and leakage radiation.
W, Jalbout, R, Howell, W, Newhauser, F, Geara, N, Khater, P, Taddei   +5 more
openaire   +2 more sources

Out-of-field Dose for Scanned and Scattered Proton Beams

AIP Conference Proceedings, 2009
The dose delivered outside of the primary field to non‐target tissues is of concern in all types of radiotherapy. For a given radiation type, this dose is dependent upon the delivery technique. Proton beams may be spread laterally to cover the target volume using scattering foils or magnetic scanning.
Michael F. Moyers, Floyd D. McDaniel, Barney L. Doyle   +2 more
openaire   +1 more source

Out-of-field dose and its constituent components for a 1.5 T MR-Linac

Physics in Medicine & Biology, 2021
Abstract This study aims to quantify the relative contributions of phantom scatter, collimator scatter and head leakage to the out-of-field doses (OFDs) of both static fields and clinical intensity-modulated radiation therapy (IMRT) treatments in a 1.5 T MR-Linac.
Bin Yang, Ka Keung Tang, Chen-Yu Huang, Hui Geng, Wai Wang Lam, Yeung Sum Wong, Mei Yan Tse, Ka Ki Lau, Kin Yin Cheung, Siu Ki Yu   +9 more
openaire   +2 more sources

Out of Field Doses in Clinical Photon and Proton Beam

AIP Conference Proceedings, 2010
Out‐of‐field doses in homogenous cubical polymethylmethacrylate (PMMA) phantom were studied in this work. Measurements were performed in clinical 171 MeV proton and megavoltae photon beam. As detectors, CaSO:Dy thermoluminescent detectors were used. According to expectancy, results showed that out‐of‐field doses are substantially lower for clinical ...
Ján Kubančák, Carlos Granja, Claude Leroy   +2 more
openaire   +1 more source

Characterization of Extrafocal Dose Influence on the Out-of-Field Dose Distribution by Monte Carlo Simulations and Dose Measurements

Health Physics, 2019
Abstract Out-of-field scattered and transmitted extrafocal radiation may induce secondary cancer in long-term survivors of external radiotherapy. Pediatric patients have higher life expectancy and tend to receive higher secondary radiation damage due to geometric and biological factors.
Firass, Ghareeb, Joana, Lencart, Jorge, Oliveira, João A M, Santos   +3 more
openaire   +2 more sources