Results 151 to 160 of about 14,294 (186)

Feasibility of 4D VMAT-CT

Biomedical Physics & Engineering Express, 2022
Abstract Objective. Feasibility of three-dimensional (3D) tracking of volumetric modulated arc therapy (VMAT) based on VMAT–computed tomography (VMAT-CT) has been shown previously by our group.
Xiaodong Zhao, Rui Zhang
openaire   +2 more sources

4D VMAT, gated VMAT, and 3D VMAT for stereotactic body radiation therapy in lung

Physics in Medicine and Biology, 2013
Four-dimensional volumetric modulated arc therapy (4D VMAT) is a treatment strategy for lung cancers that aims to exploit relative target and tissue motion to improve organ at risk (OAR) sparing. The algorithm incorporates the entire patient respiratory cycle using 4D CT data into the optimization process.
E, Chin, S K, Loewen, A, Nichol, K, Otto
openaire   +2 more sources

Coplanar VMAT vs. noncoplanar VMAT in the treatment of sinonasal cancer

Strahlentherapie und Onkologie, 2014
Previous studies showed that noncoplanar intensity-modulated radiotherapy (NC-IMRT) for sinonasal cancer is superior to coplanar intensity-modulated radiotherapy (IMRT). Volumetric-modulated arc therapy (VMAT) is a newly introduced treatment modality, and the performance of noncoplanar VMAT for sinonasal cancer has not been well described to date.To ...
Ning, Zhong-Hua, Jiang, Jing-Ting, Li, Xiao-Dong, Mu, Jin-Ming, Mo, Jun-Chong, Jin, Jian-Xue, Gao, Ming, Li, Qi-Lin, Gu, Wen-Dong, Chen, Lu-Jun, Pei, Hong-Lei   +10 more
openaire   +2 more sources

Sci-Thur PM: YIS - 03: Comparing 4D-VMAT, Gated-VMAT and 3D-VMAT in SBRT treatment of lung cancer

Medical Physics, 2012
To evaluate the treatment plan qualities of 4D-VMAT, gated-VMAT and 3D-VMAT in the treatment of non-small cell lung cancer (NSCLC) in stereotactic body radiation therapy (SBRT).4D-VMAT is a motion compensation strategy that aims to exploit relative target and OAR motion to increase OAR sparing over 3D-VMAT without the long treatment times associated ...
E, Chin, S, Loewen, A, Nichol, K, Otto
openaire   +4 more sources

Fully automated segmentally boosted VMAT

Medical Physics, 2023
AbstractPurposeTreatment planning for volumetric modulated arc therapy (VMAT) typically involves the use of multiple arcs to achieve sufficient intensity modulation. Alternatively, we can perform segment boosting to achieve similar intensity modulation while also reducing the number of control points used. Here, we propose the MetaPlanner Boosted VMAT (
Charles, Huang, Yusuke, Nomura, Yong, Yang, Lei, Xing   +3 more
openaire   +2 more sources

An empirical method for splitting arcs in VMAT

Physica Medica, 2021
We present a new approach to determine the optimal arc split for VMAT beams which is an extension of our recently published algorithm for selecting optimal beam angles in Intensity Modulated Radiation Therapy (IMRT) MATERIAL AND METHODS: The proposed approach uses an objective function based scoring method called "ψ - score" to determine optimal arc ...
Bojarajan, Perumal, S Harikrishna, Etti, Vaitheeswaran, Ranganathan, Natarajan, Ramar, Prajwal, Kumar, Gipson, Joe Anto, C S, Sureka   +6 more
openaire   +2 more sources

Online adaptation and verification of VMAT

Medical Physics, 2015
Purpose:This work presents a method for fast volumetric modulated arc therapy (VMAT) adaptation in response to interfraction anatomical variations. Additionally, plan parameters extracted from the adapted plans are used to verify the quality of these plans.
Wouter, Crijns, Gilles, Defraene, Hans, Van Herck, Tom, Depuydt, Karin, Haustermans, Frederik, Maes, Frank, Van den Heuvel   +6 more
openaire   +2 more sources

Dose rate mapping of VMAT treatments

Physics in Medicine and Biology, 2016
Human tissues exhibit a varying response to radiation dose depending on the dose rate and fractionation scheme used. Dose rate effects have been reported for different radiations, and tissue types. The literature indicates that there is not a significant difference in response for low-LET radiation when using dose rates between 1 Gy min(-1) and 12 Gy ...
Podesta, Mark, Popescu, I. Antoniu, Verhaegen, Frank   +2 more
openaire   +3 more sources

Dose Verification in IMRT and VMAT

AIP Conference Proceedings, 2011
This is a review paper of the current IMRT dosimetric verification methods, with the emphasis on the solid state dosimeters. Different types of IMRT treatments and the associated quality assurance challenges are described. The prevailing techniques of quantifying dosimetric agreement and their weaknesses in terms of clinical relevance are discussed.
Vladimir Feygelman, Benjamin E. Nelms, Anatoly Rosenfeld, Tomas Kron, Francesco d’Errico, Marko Moscovitch   +5 more
openaire   +1 more source

Plan Evaluation in IMRT and VMAT

2019
The evaluation of a radiation plan is an essential task for the radiation oncologist, which has become more complex due to intensity-modulated radiation therapy (IMRT). Multiple factors must be evaluated before approval of final IMRT plan. This chapter describes the practical approach to IMRT treatment planning and evaluation from a radiation ...
Sandeep Muzumder, M. G. John Sebastian
openaire   +1 more source