Results 21 to 30 of about 649,932 (223)

Focal salvage treatment for radiorecurrent prostate cancer: A magnetic resonance-guided stereotactic body radiotherapy versus high-dose-rate brachytherapy planning study [PDF]

Physics and Imaging in Radiation Oncology, 2020
Background and Purpose: Magnetic resonance imaging (MRI)-guided focal salvage high-dose-rate brachytherapy (FS-HDR-BT) is one of the treatment options for radiorecurrent localized prostate cancer. However, due to the invasive nature of the treatment, not
Thomas Willigenburg, Ellis Beld, Jochem Hes, Jan J.W. Lagendijk, Hans C.J. de Boer, Marinus A. Moerland, Jochem R.N. van der Voort van Zyp   +6 more
doaj   +3 more sources

Real-time tracking of lung tumors using a 1.5T Elekta Unity MR-Linac: first clinical experiences [PDF]

Front Oncol
There is a growing interest in the application of MRI-guided adaptive radiotherapy (MRIgART) to improve the treatment of lung tumors. Motion management plays a central role to better localize these tumors and minimize toxicities to surrounding healthy ...
Blake Smith, Bryan Allen, Samuel Rusu, J. St-Aubin, Daniel Hyer   +4 more
semanticscholar   +2 more sources

Surrogate gating strategies for the Elekta Unity MR‐Linac gating system [PDF]

J Appl Clin Med Phys
Purpose MRI‐guided adaptive radiotherapy can directly monitor the anatomical positioning of the intended target during treatment with no additional imaging dose. Elekta has recently released its comprehensive motion management (CMM) solution that enables
Samuel Rusu, Blake R. Smith, J. St-Aubin, Nathan Shaffer, D. Hyer   +4 more
semanticscholar   +2 more sources

MRI-guided adaptive radiotherapy for prostate cancer: When do we need to account for intra-fraction motion? [PDF]

Clinical and Translational Radiation Oncology, 2022
A shift of the daily plan can mitigate target position changes that occur between daily MR acquisition and treatment for MR-linac radiotherapy, but increases the session time.
R. Lawes, H. Barnes, T. Herbert, A. Mitchell, S. Nill, U. Oelfke, A. Pathmanathan, G. Adair Smith, K. Sritharan, A. Tree, H.A. McNair, A. Dunlop   +11 more
doaj   +4 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

Innovations in MR-Linac Treatment – Physics Perspective [PDF]

IGCT Workshops, 2023
July 23, 2023 Session I: Strategies for Alternative Online Adaptation Workflows for UnityEric Paulson, PhDAssociate Professor, Radiation Oncology Medical, College of Wisconsin Implementation of Customized Imaging Sequences for MR-Guided Adaptive ...
Fast, Martin, Hyer, Daniel, PhD, Lu, Weiguo, PhD, Paulson, Eric, PhD, Subashi, Ergys, PhD   +4 more
core   +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

Validation of a diode‐based phantom for high temporal and spatial measurements in a 1.5 T MR‐linac [PDF]

J Appl Clin Med Phys
Background For the development and validation of dynamic treatment modalities and processes on the MR‐linac, independent measurements should be performed that validate dose delivery and linac behavior at a high temporal resolution.
S. Oolbekkink, J. Wolthaus, B. van Asselen, M. van den Dobbelsteen, B. Raaymakers   +4 more
semanticscholar   +2 more sources

MR-linac is the best modality for lung SBRT [PDF]

Journal of Applied Clinical Medical Physics, 2019
The introduction of MR‐linac hybrid modality started a new era in image guidance for radiotherapy. It provides superior soft tissue contrast compared to conventional x‐ray imaging, and offers the ability to track and gate treatment delivery, yet challenges and limitations remain in various aspects.1 Our previous Parallel Opposed issues discussed the ...
Godley, Andrew
core   +5 more sources