Results 11 to 20 of about 6,070 (214)

Adaptive fractionation at the MR-linac [PDF]

Physics in Medicine & Biology, 2023
Objective. Fractionated radiotherapy typically delivers the same dose in each fraction. Adaptive fractionation (AF) is an approach to exploit inter-fraction motion by increasing the dose on days when the distance of tumor and dose-limiting organs at risk
Dal Bello, Riccardo, Ludwig, Roman, Pérez Haas, Y, Tanadini-Lang, Stephanie, Unkelbach, Jan   +4 more
core   +3 more sources

MR-Linac Radiotherapy - The Beam Angle Selection Problem [PDF]

Frontiers in Oncology, 2021
BACKGROUND: With the large-scale introduction of volumetric modulated arc therapy (VMAT), selection of optimal beam angles for coplanar static-beam IMRT has increasingly become obsolete. Due to unavailability of VMAT in current MR-linacs, the problem has
Bijman, Rik, Breedveld, Sebastiaan, de Ruiter, Peter, Heijmen, Ben, Janssen, Tomas, Rossi, Linda, Sonke, Jan-Jakob, van Triest, Baukelien   +7 more
core   +7 more sources

3D gel dosimeter assessment for end-to-end geometric accuracy determination of the online adaptive workflow on the 1.5 T MR-linac [PDF]

Physics and Imaging in Radiation Oncology
Background and purpose:: During an end-to-end (E2E) test on the online workflow of the MR-linac, the performance of the treatment starting from the acquisition of pre-treatment MRI scans and ending with dose delivery is quantified.
Stijn Oolbekkink, Jochem W.H. Wolthaus, Bram van Asselen, Bas W. Raaymakers   +3 more
doaj   +3 more sources

Long-term performance evaluation of a 1.5T MR-Linac using statistical process control techniques [PDF]

Radiation Oncology
Background The integration of magnetic resonance imaging with linear accelerators (Linacs) enhances adaptive radiotherapy by providing real-time imaging for improved treatment precision.
Qing Xiao, Mengdie Shen, Guangjun Li, Shipai Zhu, Jinrong He, Qiang Wang, Guyu Dai, Hang Yu, Jialu Lai, Renming Zhong, Sen Bai   +10 more
doaj   +2 more sources

Compact bunker shielding assessment for 1.5 T MR-Linac

Scientific Reports, 2022
This study evaluated the effect of the 1.5 T magnetic field of the magnetic resonance-guided linear accelerator (MR-Linac) on the radiation leakage doses penetrating the bunker radiation shielding wall.
Jiwon Sung, Yeonho Choi, Jun Won Kim, Ik Jae Lee, Ho Lee   +4 more
doaj   +4 more sources

Demonstration of motion-compensated volumetric modulated arc radiotherapy on an MR-linac [PDF]

Physics and Imaging in Radiation Oncology
Intensity-modulated radiotherapy (IMRT) in combination with magnetic resonance imaging (MRI)-guided gated delivery represents the latest development in the treatment of abdominothoracic tumours on MR-linac.
Pim T.S. Borman, Prescilla Uijtewaal, Jeffrey Snyder, Bryan Allen, Caiden K. Atienza, Peter Woodhead, Daniel E. Hyer, Bas W. Raaymakers, Martin F. Fast   +8 more
doaj   +2 more sources

Automatic 3D Monte-Carlo-based secondary dose calculation for online verification of 1.5 T magnetic resonance imaging guided radiotherapy

Physics and Imaging in Radiation Oncology, 2021
Background and purpose: Hybrid magnetic resonance linear accelerator (MR-Linac) systems represent a novel technology for online adaptive radiotherapy.
Marcel Nachbar, David Mönnich, Oliver Dohm, Melissa Friedlein, Daniel Zips, Daniela Thorwarth   +5 more
doaj   +1 more source

Prospective Evaluation of In Vivo and Phantom Repeatability and Reproducibility of Diffusion-Weighted MRI Sequences on 1.5 T MRI-Linear Accelerator (MR-Linac) and MR Simulator Devices for Head and Neck Cancers [PDF]

, 2023
INTRODUCTION: Diffusion-weighted imaging (DWI) on MRI-linear accelerator (MR-linac) systems can potentially be used for monitoring treatment response and adaptive radiotherapy in head and neck cancers (HNC) but requires extensive validation. We performed
Ahmed, Sara, Boss, Michael, Christodouleas, John, Dresner, Alex, Fuller, Clifton D, He, Renjie, McDonald, Brigid A, Mohamed, Abdallah S R, Mulder, Samuel, Philippens, Marielle, Preston, Kathryn, Salzillo, Travis, Shukla Dave, Amita, Thorwarth, Daniela, van Houdt, Petra, Wang, Jihong   +15 more
core   +5 more sources

Redefining radiotherapy for early-stage breast cancer with single dose ablative treatment: a study protocol [PDF]

, 2017
Contains fulltext : 181789.pdf (publisher's version ) (Open ...
A. J. Witkamp, B. van Asselen, C. H. van Gils, E. van der Wall, H. J. G. D. van den Bongard, H. M. Verkooijen, M. E. P. Philippens, M. G. G. Hobbelink, M. van Vulpen, P. J. van Diest, R. K. Charaghvandi, R. Koelemij, R. M. Pijnappel, T. C. van Heijst, T. van Dalen   +14 more
core   +5 more sources

Commissioning measurements on an Elekta Unity MR-Linac [PDF]

Physical and Engineering Sciences in Medicine, 2022
Abstract Magnetic resonance-guided radiotherapy technology is relatively new and commissioning publications, quality assurance (QA) protocols and commercial products are limited. This work provides guidance for implementation measurements that may be performed on the Elekta Unity MR-Linac (Elekta, Stockholm ...
Marcus Powers, John Baines, Robert Crane, Chantelle Fisher, Stephen Gibson, Linda Marsh, Bronwyn Oar, Ariadne Shoobridge, Emily Simpson-Page, Marchant Van der Walt, Glenn de Vine   +10 more
openaire   +3 more sources