Results 61 to 70 of about 649,932 (223)

Evaluation of an anthropomorphic ion chamber and 3D gel dosimetry head phantom at a 0.35 T MR-linac using separate 1.5 T MR-scanners for gel readout

Zeitschrift für Medizinische Physik, 2022
Purpose: To date, no universally accepted technique for the evaluation of the overall dosimetric performance of hybrid integrated magnetic resonance imaging (MR) – linear accelerators (linacs) is available. We report on the suitability and reliability of
Lukas Nierer, Florian Kamp, Michael Reiner, Stefanie Corradini, Moritz Rabe, Olaf Dietrich, Katia Parodi, Claus Belka, Christopher Kurz, Guillaume Landry   +9 more
doaj   +1 more source

MR‐Linac guided adaptive stereotactic ablative body radiotherapy for recurrent cardiac sarcoma with mitral valve bioprosthesis – a case report

Journal of Medical Radiation Sciences, 2023
We present the first case in the literature of a 78‐year‐old woman with recurrent cardiac sarcoma adjacent to a bioprosthetic mitral valve treated with magnetic resonance linear accelerator (MR‐Linac) guided adaptive stereotactic ablative body ...
Vikneswary Batumalai, Madeline Carr, Michael Jameson, David Crawford, Urszula Jelen, Claire Pagulayan, Tania Twentyman, Angela Hong, Jeremy de Leon   +8 more
doaj   +1 more source

Ionization chamber correction factors for MR-linacs

Physics in Medicine & Biology, 2018
Previously, readings of air-filled ionization chambers have been described as being influenced by magnetic fields. To use these chambers for dosimetry in magnetic resonance guided radiotherapy (MRgRT), this effect must be taken into account by introducing a correction factor k B.
Stefan, Pojtinger, Oliver Steffen, Dohm, Ralf-Peter, Kapsch, Daniela, Thorwarth   +3 more
openaire   +2 more sources

Comparison of Intensity Modulated Radiotherapy Treatment Plans Between 1.5T MR-Linac and Conventional Linac

Technology in Cancer Research & Treatment, 2021
In this study, we assess the dosimetric qualities and usability of planning for 1.5 T MR-Linac based intensity modulated radiotherapy (MRL-IMRT) for various clinical sites in comparison with IMRT plans using a conventional linac.
Shouliang Ding MS, Yongbao Li PhD, Hongdong Liu PhD, Rui Li PhD, Bin Wang PhD, Jun Zhang PhD, Yan Chen PhD, Xiaoyan Huang MS   +7 more
doaj   +1 more source

Tumour auto-contouring on 2d cine MRI for locally advanced lung cancer: A comparative study [PDF]

, 2017
BACKGROUND AND PURPOSE: Radiotherapy guidance based on magnetic resonance imaging (MRI) is currently becoming a clinical reality. Fast 2d cine MRI sequences are expected to increase the precision of radiation delivery by facilitating tumour delineation ...
Eiben, B, Fast, MF, Hawkes, DJ, McClelland, JR, Menten, MJ, Oelfke, U, Wetscherek, A   +6 more
core   +2 more sources

Technical design and concept of a 0.35 T MR-Linac

Clinical and Translational Radiation Oncology, 2019
Highlights • The 0.35 T MR-Linac combines a 6MV linac with onboard MR imaging.• MR imaging provides superior soft-tissue contrast compared to X-ray IGRT.• The system allows a fully integrated on-table adaptive workflow.• Cine MR enables automated beam ...
S. Klüter
semanticscholar   +1 more source

4D-MRI driven MR-guided online adaptive radiotherapy for abdominal stereotactic body radiation therapy on a high field MR-Linac: Implementation and initial clinical experience

Clinical and Translational Radiation Oncology, 2020
Background and purpose: In this report, we describe our implementation and initial clinical experience using 4D-MRI driven MR-guided online adaptive radiotherapy (MRgOART) for abdominal stereotactic body radiotherapy (SBRT) on the Elekta Unity MR-Linac ...
Eric S. Paulson, Ergun Ahunbay, Xinfeng Chen, Nikolai J. Mickevicius, Guang-Pei Chen, Christopher Schultz, Beth Erickson, Michael Straza, William A. Hall, X. Allen Li   +9 more
doaj   +1 more source

Individual elective lymph node irradiation for the reduction of complications in head and neck cancer patients (iNode): A phase-I feasibility trial protocol

Clinical and Translational Radiation Oncology, 2023
Introduction: The long-term complication rate in head-and-neck squamous cell carcinoma (HNSCC) patients caused by radiotherapy (RT) can be decreased by restricting elective neck irradiation (ENI) from large adjacent lymph node levels to only individual ...
Floris C.J. Reinders, Mischa de Ridder, Patricia A.H. Doornaert, Cornelis P.J. Raaijmakers, Marielle E.P. Philippens   +4 more
doaj   +1 more source

Feasibility of tumour-focused adaptive radiotherapy for bladder cancer on the MR-linac. [PDF]

, 2022
Bladder tumour-focused magnetic resonance image-guided adaptive radiotherapy using a 1.5 Tesla MR-linac is feasible. A full online workflow adapting to anatomy at each fraction is achievable in approximately 30 min. Intra-fraction bladder filling did not
Chick, J, Diamantopoulos, S, Dunlop, A, Goodwin, E, Hafeez, S, Herbert, T, Huddart, R, Ingle, M, McNair, H, Mitchell, A, Nill, S, Oelfke, U, Smith, G   +12 more
core   +1 more source

Case Report: MR-Guided Adaptive Radiotherapy, Some Room to Maneuver

Frontiers in Oncology, 2022
BackgroundA magnetic resonance linear accelerator (MR-Linac) provides superior soft tissue contrast to evaluate inter- and intra-fraction motion and facilitate online adaptive radiation therapy (ART).
Winnie Li, Winnie Li, Jeff Winter, Jeff Winter, Jerusha Padayachee, Jennifer Dang, Vickie Kong, Vickie Kong, Peter Chung, Peter Chung   +9 more
doaj   +1 more source