Results 21 to 30 of about 2,643 (174)

The effect of kV imaging dose on PTV and OAR planning constraints in lung SBRT using stereoscopic/monoscopic real-time tumor-monitoring system. [PDF]

J Appl Clin Med Phys
Abstract Purpose Quantify the impact of additional imaging doses on clinical dose constraints during lung stereotactic body radiotherapy (SBRT) treatment utilizing stereoscopic/monoscopic real‐time tumor monitoring. Materials and Methods Thirty lung SBRT patients treated with the volumetric arc therapy technique were randomly selected from the ...
Abeywardhana R, Sattarivand M.
europepmc   +2 more sources

Radiology and mammography standard X-ray spectra simulated with the Monte Carlo method

Brazilian Journal of Radiation Sciences, 2021
Six standard beams described in the TRS-457 (IAEA): RQR 5, 8, M1, M2, M3, M4 were simulated using the EGSnrc Monte Carlo code. Each spectrum was created by an X-ray tube simulated in BEAMnrc, and attenuation curves were obtained using the application ...
Joel Marques Xavier Filho, Iury Santos Silveira, Linda Viola Ehlin Caldas   +2 more
doaj   +1 more source

EGSnrc application for IMRT planning

Reports of Practical Oncology & Radiotherapy, 2020
The aim of this study was to describe a detailed instruction of intensity modulated radiotherapy (IMRT) planning simulation using BEAMnrc-DOSXYZnrc code system (EGSnrc package) and present a new graphical user interface based on MATLAB code (The MathWorks) to combine more than one. 3ddose file which were obtained from the IMRT plan.
Sitti, Yani, Ilmi, Rizkia, , Kamirul, Mohamad Fahdillah, Rhani, Mohammad, Haekal, Freddy, Haryanto   +5 more
openaire   +3 more sources

The effect of algorithms on dose distribution in inhomogeneous phantom: Monaco treatment planning system versus monte carlo simulation

Journal of Medical Physics, 2021
Background: The aim of this study is to evaluate the dose calculation algorithms commonly used in TPS by using MC simulation in the highly different inhomogeneous region and in the small fields and to provide the following uniquely new information in the
Taylan Tuğrul
doaj   +1 more source

Monte Carlo analysis of energy deposition and X-ray fluence in cylindrical anode systems. [PDF]

J Appl Clin Med Phys
Abstract Background Cylindrical anode X‐ray systems are increasingly used in multisource imaging; however, electron beam interactions with the curved anodes cause geometric distortions that alter energy deposition and X‐ray emission. Understanding these effects is key to optimizing system performance.
Alharbi MKM, Zhou A, Davidson R, Naunton M, Makanjee C.   +4 more
europepmc   +2 more sources

Field output correction factors using a scintillation detector. [PDF]

Med Phys
Abstract Background As small radiation fields play an ever‐increasing role in radiation therapy, accurate dosimetry of these fields becomes critical to ensure high quality dose calculation and treatment optimization. Despite the availability of several small volume dose detectors, small field dosimetry remains challenging.
Gingras L, Cervantes Y, Beaulieu F, Besnier M, Coté B, Lambert-Girard S, LeBlanc D, LeChasseur Y, Therriault-Proulx F, Beaulieu L, Archambault L.   +10 more
europepmc   +2 more sources

Clinical treatment planning for kilovoltage radiotherapy using EGSnrc and Python

Journal of Applied Clinical Medical Physics, 2022
AbstractKilovoltage radiotherapy dose calculations are generally performed with manual point dose calculations based on water dosimetry. Tissue heterogeneities, irregular surfaces, and introduction of lead cutouts for treatment are either not taken into account or crudely approximated in manual calculations.
Nikandrovs, Mihails, McClean, Brendan, Shields, Laura, McCavana, Patrick, Vintró, Luis León   +4 more
openaire   +2 more sources

Impact of range uncertainties for intensity-modulated mixed electron-photon radiation therapy. [PDF]

Med Phys
Abstract Background In the context of mixed electron‐photon radiation therapy (MBRT), while the necessity of robust optimization to setup uncertainties is well‐established, range uncertainties have yet to be investigated. Purpose This study provides the first assessment of the impact of range uncertainties on MBRT plans.
Heng VJ, Renaud MA, Serban M, Seuntjens J.   +3 more
europepmc   +2 more sources

A graphical user interface for Monte Carlo dose calculations for brachytherapy with egs_brachy. [PDF]

Med Phys
Abstract Background Recent advancements in brachytherapy necessitate precise dose calculations, transitioning from the traditional TG43 planning methods to the more sophisticated TG186 recommendations. However, the availability of accessible and efficient Monte Carlo (MC) codes capable of interfacing with clinical data for these advanced calculations ...
Moghadam N, Akbari F, Jarvis S, Martinov M, Thibodeau M, Zhang C, Cygler JE, Thomson RM.   +7 more
europepmc   +2 more sources

Determination of Dose Field Distribution of 125I-103Pd Seed Source with Monte-Carlo and Experimental Method

Journal of Isotopes, 2014
Under the same parameters, the Monte Carle codes MCNP5 and EGSnrc were used to calculate the dose field distribution. Measurements of the dose field distributions about the source were performed using LiF thermoluminescent dosimeters(GR-200) in PMMA ...
CAO Zhen1;MENG Bei-di2;ZHANG Wen-zai2;FENG Gen-sheng2;WANG Xiao-jing2
doaj   +1 more source