Results 21 to 30 of about 506,839 (244)

Range-shifter effects on the stray field in proton therapy measured with the variance–covariance method

Frontiers in Oncology, 2022
Measurements in the stray radiation field from a proton therapy pencil beam at energies 70 and 146 MeV were performed using microdosimetric tissue-equivalent proportional counters (TEPCs).
Linda Eliasson, Jan Lillhök, Torbjörn Bäck, Robert Billnert-Maróti, Alexandru Dasu, Malgorzata Liszka   +5 more
doaj   +1 more source

Assessment of out‐of‐field absorbed dose and equivalent dose in proton fields [PDF]

Medical Physics, 2009
PurposeIn proton therapy, as in other forms of radiation therapy, scattered and secondary particles produce undesired dose outside the target volume that may increase the risk of radiation‐induced secondary cancer and interact with electronic devices in the treatment room.
Clasie, B, Wroe, Andrew, Kooy, Hanne, Depauw, Nicolas, Flanz, J B, Paganetti, Harald, Rosenfeld, Anatoly B.   +6 more
openaire   +3 more sources

Comparison of 3DCRT and IMRT out-of-field doses in pediatric patients using Monte Carlo simulations with treatment planning system calculations and measurements

Frontiers in Oncology, 2022
3DCRT and IMRT out-of-field doses in pediatric patients were compared using Monte Carlo simulations with treatment planning system calculations and measurements.PurposeOut-of-field doses are given to healthy tissues, which may allow the development of ...
Ana Cravo Sá, Ana Cravo Sá, Ana Cravo Sá, Andreia Barateiro, Bryan P. Bednarz, Pedro Almeida, Pedro Vaz, Tiago Madaleno   +7 more
doaj   +1 more source

Electron Streaming Effect Associated With the Elekta Unity Anterior Imaging Coil

Frontiers in Physics, 2022
The presence of the static field in magnetic resonance guided radiation therapy (MRgRT) systems, such as the Elekta Unity MR-Linac (MRL), influences charged particle motion due to the Lorentz force in and around patients.
Marcus Powers, Marcus Powers, John Baines   +2 more
doaj   +1 more source

Determining Out-of-Field Doses and Second Cancer Risk From Proton Therapy in Young Patients—An Overview

Frontiers in Oncology, 2022
Proton therapy has the potential to provide survival and tumor control outcomes comparable and frequently superior to photon therapy. This has led to a significant concern in the medical physics community on the risk for the induction of second cancers ...
Maite Romero-Expósito, Maite Romero-Expósito, Iuliana Toma-Dasu, Iuliana Toma-Dasu, Alexandru Dasu, Alexandru Dasu   +5 more
doaj   +1 more source

A simple analytical model for a fast 3D assessment of peripheral photon dose during coplanar isocentric photon radiotherapy

Frontiers in Oncology, 2022
Considering that cancer survival rates have been growing and that nearly two-thirds of those survivors were exposed to clinical radiation during its treatment, the study of long-term radiation effects, especially secondary cancer induction, has become ...
Beatriz Sánchez-Nieto, Ignacio N. López-Martínez, José Luis Rodríguez-Mongua, Ignacio Espinoza   +3 more
doaj   +1 more source

A publicly available dataset of out-of-field dose profiles of a 6 MV linear accelerator [PDF]

Physical and Engineering Sciences in Medicine, 2021
Abstract An increase in radiotherapy-induced secondary malignancies has led to recent developments in analytical modelling of out-of-field dose. These models must be validated against measurements, but currently available datasets are outdated or limited in scope.
Samuel Peet, Naasiha Cassim, Tanya Kairn, Jamie V Trapp, Scott B Crowe   +4 more
openaire   +6 more sources

Performance evaluation of a Monte Carlo-based treatment planning system in out-of-field dose estimation during dynamic IMRT with different dose rates

Informatics in Medicine Unlocked, 2022
Aim: The present study aimed to investigate the effect of dose rate variations in the out-of-field regions on the dose calculation accuracy of an algorithm based on the Monte Carlo (MC) method implemented in Monaco (V.5.11.03) Treatment Planning System ...
Leila Mahmoudi, Kamal Mostafanezhad, Ahad Zeinali   +2 more
doaj   +1 more source

The Estimation of Radiation Dose to Out-of-Field Points of Organs at Risk in Block and MLC Shielded Fields in Lung Cancer Radiation Therapy

Frontiers in Biomedical Technologies, 2023
Purpose: Photon-field shaping in radiation therapy with cerrobend block or Multi-Leaf Collimator (MLC) leads to an increase in the scattered dose to the out-of-field Organ At Risk (OAR).
Nastaran Sadat Momeni, Saeed Afraydoon, Nima Hamzian, Abolfazl Nikfarjam, Mahmoud Vakili Ghasemabad, Sepideh Abdollahi-Dehkordi, Masoud Shabani, Mahdi Dehestani, Adel Heidari   +8 more
doaj   +1 more source

Estimated radiation doses to ovarian and uterine organs in breast cancer irradiation using radio‐photoluminescent glass dosimeters (RPLDs)

Journal of Medical Radiation Sciences, 2021
Introduction The well‐being of breast cancer patients is essential, especially fertility in patients of reproductive age. The objective of this study was to estimate the radiation doses to the ovaries and uterus for different treatment techniques of ...
Puntiwa Oonsiri, Chulee Vannavijit, Mananchaya Wimolnoch, Sivalee Suriyapee, Kitwadee Saksornchai   +4 more
doaj   +1 more source