Results 111 to 120 of about 649,932 (223)

Evaluation of hybrid DIR performance using controlling structures and points of interest in MR‐guided adaptive radiotherapy for prostate cancer patients

Journal of Applied Clinical Medical Physics, Volume 27, Issue 1, January 2026.
Abstract Background MR‐guided adaptive radiotherapy (ART) allows for daily plan optimization based on patient‐specific anatomy. Accumulated doses, driven by deformable image registration (DIR), of daily fractions can provide cumulative dose metrics and insights into toxicity and tumor control.
Victor Malkov, Iymad R. Mansour, Vickie Kong, Winnie Li, Jennifer Dang, Parisa Sadeghi, Inmaculada Navarro, Jerusha Padayachee, Peter Chung, Jeff D. Winter, Tony Tadic   +10 more
wiley   +1 more source

Specific instrumentation and diagnostics for high-intensity hadron beams

, 2013
An overview of various typical instruments used for high-intensity hadron beams is given. In addition, a few important diagnostic methods are discussed which are quite special for these kinds of beams.Comment: 58 pages, contribution to the CAS - CERN ...
Wittenburg, Kay
core   +1 more source

Experimental demonstration of real-time cardiac physiology-based radiotherapy gating for improved cardiac radioablation on an MR-linac.

Medical Physics (Lancaster)
BACKGROUND Cardiac radioablation is a noninvasive stereotactic body radiation therapy (SBRT) technique to treat patients with refractory ventricular tachycardia (VT) by delivering a single high-dose fraction to the VT isthmus.
O. Akdag, P. Borman, S. Mandija, P. Woodhead, P. Uijtewaal, B. Raaymakers, M. Fast   +6 more
semanticscholar   +1 more source

Control‐point‐specific plan robustness in volumetric modulated arc therapy‐based cranial radiotherapy

Journal of Applied Clinical Medical Physics, Volume 27, Issue 1, January 2026.
Abstract Background Progress in mitigating plan degradation due to intrafraction patient motion may involve the identification and management of specific control points that are sensitive to motion. Robust planning in this manner could improve deliverable dosimetry and support advancements toward reducing planning target volume (PTV) margins.
Daniel Crawford, Cody Church, Robert Lee MacDonald   +2 more
wiley   +1 more source

Dosimetric feasibility of utilizing the ViewRay magnetic resonance guided linac system for image-guided spine stereotactic body radiation therapy [PDF]

, 2019
INTRODUCTION: Spine stereotactic body radiation therapy (SBRT) achieves favorable outcomes compared to conventional radiotherapy doses/fractionation. The spinal cord is the principal dose-limiting organ-at-risk (OAR), and safe treatment requires precise ...
Aydogan, Bulent, Cammin, Jochen, Green, Olga, Malin, Martha, Mutic, Sasa, Pitroda, Sean, Redler, Gage, Stevens, Tynan   +7 more
core   +1 more source

Investigating the effect of a magnetic field on dose distributions at phantom-air interfaces using PRESAGE® 3D dosimeter and Monte Carlo simulations. [PDF]

, 2018
Dosimetric quality assurance (QA) of the new Elekta Unity (MR-linac) will differ from the QA performed of a conventional linac due to the constant magnetic field, which creates an electron return effect (ERE).
Adamovics, J, Billas, I, Costa, F, Doran, SJ, Duane, S, Hanson, IM, Nill, S, Oelfke, U, Shipley, D   +8 more
core   +1 more source

Case report: Clinical workflow considerations for treating soft-tissue sarcoma on a 1.5-T MR-Linac

Technical Innovations & Patient Support in Radiation Oncology
We present specific issues that arose when using a 1.5-Tesla MR-Linac to treat a series of 4 soft-tissue sarcoma (STS) patients. These issues arose from the combination of typical STS attributes (long, off-axis target) and MR-Linac design-specific ...
Gye Won Choi, Gary A. Eastwick, Leonard H. Kim   +2 more
doaj   +1 more source

Feasibility of celiac axis delineation and treatment on combined magnetic resonance imaging and linear accelerator systems

Physics and Imaging in Radiation Oncology
Trials have been performed on irradiating celiac plexus for pancreatic cancer pain management. Images from a combined magnetic resonance imaging and linear accelerator system (MR-linac) for ten patients were assessed for delineation of celiac ganglia ...
Sara N. Lim, Yirong Liu, Anugayathri Jawahar, Bharat B. Mittal, Tarita O. Thomas   +4 more
doaj   +1 more source

Treatment planning for MR-guided SBRT of pancreatic tumors on a 1.5 T MR-Linac: A global consensus protocol

Clinical and Translational Radiation Oncology
Background and purpose: Treatment planning for MR-guided stereotactic body radiotherapy (SBRT) for pancreatic tumors can be challenging, leading to a wide variation of protocols and practices.
Guus Grimbergen, Hidde Eijkelenkamp, Louk M.W. Snoeren, Rana Bahij, Uffe Bernchou, Erik van der Bijl, Hanne D. Heerkens, Shawn Binda, Sylvia S.W. Ng, Christelle Bouchart, Zelda Paquier, Kerryn Brown, Richard Khor, Robert Chuter, Linnéa Freear, Alex Dunlop, Robert Adam Mitchell, Beth A. Erickson, William A. Hall, Paola Godoy Scripes, Neelam Tyagi, Jeremiah de Leon, Charles Tran, Seungjong Oh, Paul Renz, Andrea Shessel, Edward Taylor, Martijn P.W. Intven, Gert J. Meijer   +28 more
doaj   +1 more source

Dose Calculation Accuracy of Beam Models in RadCalc for a 1.5 T MR-Linac

Cancers
Simple Summary The recent advancement to RadCalc version 7.1.4 marks a significant milestone as an independent dose verification tool tailored to encompass both mechanical and dosimetric intricacies of MR-linacs.
Ji-Yun Sung, Yeonho Choi, Jun Won Kim, Ho Lee   +3 more
semanticscholar   +1 more source