Results 191 to 200 of about 23,199 (236)

Single Arc Volumetric Modulated Arc Therapy of head and neck cancer

Radiotherapy and Oncology, 2010
The quality of Volumetric Modulated Arc Therapy (VMAT) plans is highly dependent on the performance of the optimization algorithm used. Recently new algorithms have become available which are capable of generating VMAT plans for Elekta accelerators. The VMAT algorithm in Pinnacle is named SmartArc and its capability to generate treatment plans for head
Bertelsen, Anders, Hansen, Christian Rønn, Johansen, Jørgen, Brink, Carsten   +3 more
openaire   +5 more sources

Choreographing Couch and Collimator in Volumetric Modulated Arc Therapy

International Journal of Radiation Oncology*Biology*Physics, 2011
To design and optimize trajectory-based, noncoplanar subarcs for volumetric modulated arc therapy (VMAT) deliverable on both Varian TrueBEAM system and traditional accelerators; and to investigate their potential advantages for treating central nervous system (CNS) tumors.To guide the computerized selection of beam trajectories consisting of ...
Yingli, Yang, Pengpeng, Zhang, Laura, Happersett, Jianping, Xiong, Jie, Yang, Maria, Chan, Kathryn, Beal, Gig, Mageras, Margie, Hunt   +8 more
openaire   +4 more sources

Modulation indices for volumetric modulated arc therapy

Physics in Medicine and Biology, 2014
The aim of this study is to present a modulation index (MI) for volumetric modulated arc therapy (VMAT) based on the speed and acceleration analysis of modulating-parameters such as multi-leaf collimator (MLC) movements, gantry rotation and dose-rate, comprehensively.
Jong Min, Park, So-Yeon, Park, Hyoungnyoun, Kim, Jin Ho, Kim, Joel, Carlson, Sung-Joon, Ye   +5 more
openaire   +2 more sources

Radiosurgery treatment planning using conformal arc informed volumetric modulated arc therapy

Medical Dosimetry, 2021
Linac based radiosurgery to multiple metastases is commonly planned with volumetric modulated arc therapy (VMAT) as it effectively achieves high conformality to complex target arrangements. However, as the number of targets increases, VMAT can struggle to block between targets, which can lead to highly modulated and/or nonconformal multi-leaf ...
William M, Giles, Edward T, Cullom, Obed A-O, Laryea, Ahmad, Nobah, Victor G L, Alves, Fang-Fang, Yin, John P, Kirkpatrick, Justus D, Adamson   +7 more
openaire   +2 more sources

Commissioning of Volumetric Modulated Arc Therapy (VMAT)

International Journal of Radiation Oncology*Biology*Physics, 2009
Volumetric modulated arc therapy (VMAT) involves the simultaneous use of dynamic multileaf collimator (DMLC) techniques and gantry arcing; appropriate quality assurance is therefore required. This article describes the development and implementation of procedures for commissioning VMAT on a commercial linear accelerator (Elekta PreciseBeam VMAT with ...
James L, Bedford, Alan P, Warrington
openaire   +2 more sources

Intensity-modulated radiotherapy, coplanar volumetric-modulated arc, therapy, and noncoplanar volumetric-modulated arc therapy in, glioblastoma: A dosimetric comparison

Clinical Neurology and Neurosurgery, 2019
Advanced techniques such as volumetric-modulated arc therapy (VMAT) may reduce radiation damage and improve the quality of life for patients.We performed a study comparing dose distributions to the planning target volumes(PTVs) and other organs at risk (OARs) of intensity-modulated radiotherapy (IMRT),coplanar VMAT (coVMAT), and non-coplanar VMAT ...
Yong Hou, Yan Zhang, Zhen Liu, Lili Yv, Kun Liu, Xiufang Tian, Yajuan Lv   +6 more
openaire   +2 more sources

MO-A-211-01: Volumetric Modulated Arc Therapy

Medical Physics, 2012
Volumetric Modulated Arc Therapy (VMAT) is a rotational approach to the delivery of intensity modulated radiation therapy (IMRT) that can be delivered on a conventional linear accelerator. VMAT combines the dosimetric advantages of rotational delivery with the dose painting capabilities of IMRT.
D, Shepard, R, Popple
openaire   +2 more sources

Couch modelling for volumetric modulated arc therapy (VMAT)

Australasian Physical & Engineering Sciences in Medicine, 2017
The aim of this work was to investigate the impact of the accuracy of a certain couch model on the overall accuracy of the dose calculation. For this purpose two models of the Varian Exact Couch (Varian Medical Systems, Palo Alto, CA, USA) for use in the planning of volumetric modulated arc therapy (VMAT) were created in Monaco 5.1 (Elekta, Stockholm ...
Te-yu Chyou, Friedlieb Lorenz
openaire   +2 more sources

Simultaneous trajectory generation and volumetric modulated arc therapy optimization

Medical Physics, 2020
PurposeTrajectory‐based treatment planning involves the combination of a gantry‐couch trajectory with volumetric modulated arc therapy (VMAT) treatment plan optimization. This work presents the implementation of an optimization methodology that generates a trajectory simultaneous with treatment plan optimization (simTr‐VMAT).MethodsThe optimization ...
Joel, Mullins, Marc-André, Renaud, Monica, Serban, Jan, Seuntjens   +3 more
openaire   +2 more sources

Dosimetric comparison of hybrid volumetric-modulated arc therapy, volumetric-modulated arc therapy, and intensity-modulated radiation therapy for left-sided early breast cancer

Medical Dosimetry, 2015
To compare the dosimetric performance of 3 different treatment techniques: hybrid volumetric-modulated arc therapy (hybrid-VMAT), pure-VMAT, and fixed-field intensity-modulated radiation therapy (F-IMRT) for whole-breast irradiation of left-sided early breast cancer.
Jia-Fu, Lin, Dah-Cherng, Yeh, Hui-Ling, Yeh, Chen-Fa, Chang, Jin-Ching, Lin   +4 more
openaire   +2 more sources