Results 31 to 40 of about 6,070 (214)

Longitudinal monitoring of Apparent Diffusion Coefficient (ADC) in patients with prostate cancer undergoing MR-guided radiotherapy on an MR-Linac at 1.5 T: a prospective feasibility study

Radiology and Oncology, 2023
Hybrid MRI linear accelerators (MR-Linac) might enable individualized online adaptation of radiotherapy using quantitative MRI sequences as diffusion-weighted imaging (DWI).
Almansour Haidara, Schick Fritz, Nachbar Marcel, Afat Saif, Fritz Victor, Thorwarth Daniela, Zips Daniel, Bertram Felix, Müller Arndt-Christian, Nikolaou Konstantin, Othman Ahmed E, Wegener Daniel   +11 more
doaj   +1 more source

ADC measurements on the Unity MR-linac – A recommendation on behalf of the Elekta Unity MR-linac consortium

Radiotherapy and Oncology, 2020
Diffusion-weighted imaging (DWI) for treatment response monitoring is feasible on hybrid magnetic resonance linear accelerator (MR-linac) systems. The MRI scanner of the Elekta Unity system has an adjusted design compared to diagnostic scanners. We investigated its impact on measuring the DWI-derived apparent diffusion coefficient (ADC) regarding three
Ernst S. Kooreman, Petra J. van Houdt, Rick Keesman, Floris J. Pos, Vivian W.J. van Pelt, Marlies E. Nowee, Andreas Wetscherek, Rob H.N. Tijssen, Marielle E.P. Philippens, Daniela Thorwarth, Jihong Wang, Amita Shukla-Dave, William A. Hall, Eric S. Paulson, Uulke A. van der Heide   +14 more
openaire   +6 more sources

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

Optical emission-based phantom to verify coincidence of radiotherapy and imaging isocenters on an MR-linac [PDF]

, 2021
PURPOSE: Demonstrate a novel phantom design using a remote camera imaging method capable of concurrently measuring the position of the x-ray isocenter and the magnetic resonance imaging (MRI) isocenter on an MR-linac.
Alexander, Daniel A, Andreozzi, Jacqueline M, Brůža, Petr, Cammin, Jochen, Gladstone, David J, Green, Olga, Pogue, Brian W   +6 more
core   +2 more sources

The MRI-Linear accelerator (MR-linac) Consortium: evidence based clinical introduction of an innovation in radiation oncology connecting researchers, methodology, data collection, quality assurance and technical development

Frontiers in Oncology, 2016
An international research consortium has been formed to facilitate evidence-based introduction of MR-guided radiotherapy (MR-linac) and to address how the MR-linac could be used to achieve an optimized radiation treatment approach to improve patients ...
Linda G.W. Kerkmeijer, Clifton D. Fuller, Helena M. Verkooijen, Marcel Verheij, Ananya Choudhury, Kevin J. Harrington, Chris Schultz, Arjun Sahgal, Steven J. Frank, Joel Goldwein, Kevin J. Brown, Bruce D. Minsky, Marco van Vulpen   +12 more
doaj   +1 more source

Optimising the MR‐Linac as a standard treatment modality

Journal of Medical Radiation Sciences, 2023
The magnetic resonance linear accelerator (MR‐Linac) offers a new treatment paradigm, providing improved visualisation of targets and organs at risk while allowing for daily adaptation of treatment plans in real time.
Jeremy deLeon, Tania Twentyman, Madeline Carr, Michael Jameson, Vikneswary Batumalai   +4 more
doaj   +1 more source

Quantitative analysis of diffusion weighted imaging in rectal cancer during radiotherapy using a magnetic resonance imaging integrated linear accelerator

Physics and Imaging in Radiation Oncology, 2022
Background and purpose: Magnetic resonance imaging integrated linear accelerator (MR-Linac) platforms enable acquisition of diffusion weighted imaging (DWI) during treatment providing potential information about treatment response. Obtaining DWI on these
Manasi Ingle, Matthew Blackledge, Ingrid White, Andreas Wetscherek, Susan Lalondrelle, Shaista Hafeez, Shreerang Bhide   +6 more
doaj   +1 more source

PO-0891: Clinical implementation and experience with real-time anatomy tracking and gating during MR-IGRT [PDF]

, 2016
Cardiolog
Bogers, A.J.J.C., DeRuiter, M.C., Franken, R., Gittenberger-de Groot, A.C., Goumans, M.J., Grewal, N., Jongbloed, M.R.M., Klautz, R.J.M., Lindeman, J.H.N., Mulder, B.J.M., Poelmann, R.E.   +10 more
core   +2 more sources

Comparison of treatment plan quality among MRI-based IMRT with a linac, MRI-based IMRT with tri-Co-60 sources, and VMAT for spine SABR.

PLoS ONE, 2019
PurposeThis study compares the plan quality of magnetic-resonance image (MRI)-based intensity modulated radiation therapy (IMRT) using a linac (MR-linac-IMRT), MRI-based IMRT using tri-Co-60 sources (MR-Co-60-IMRT), and volumetric modulated arc therapy ...
Chang Heon Choi, Jin Ho Kim, Jung-In Kim, Jong Min Park   +3 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