Results 11 to 20 of about 43,525 (332)

Multicriteria VMAT optimization [PDF]

Medical physics, 2011
Purpose: To make the planning of volumetric modulated arc therapy (VMAT) faster and to explore the tradeoffs between planning objectives and delivery efficiency. Methods: A convex multicriteria dose optimization problem is solved for an angular grid of 180 equi-spaced beams. This allows the planner to navigate the ideal dose distribution Pareto surface
Craft, David, McQuaid, Dualta, Wala, Jeremiah, Chen, Wei, Salari, Ehsan, Bortfeld, Thomas   +5 more
core   +5 more sources

Dosimetric analysis of half-field-based VMAT with the deep inspiration breath-hold technique for left breast cancer patients following breast-conserving surgery [PDF]

Frontiers in Oncology
ObjectiveCompared the dosimetric characteristics of half-field-based VMAT and half-field-based IMRT for left breast cancer patients combined with deep inspiration breath-hold (DIBH) and free breathing (FB) techniques.MethodsTwenty-one left breast cancer ...
Weiwei Wu, Hui Yin, Zhiwei Liu, Lipeng Liu, Chengjian Xiao, Ying Xiao, Jinquan Ding, Qungui Zhang, Hailiang Guo   +8 more
doaj   +2 more sources

Optimal partial-arcs in VMAT treatment planning [PDF]

Physics in Medicine and Biology, 2012
Purpose: To improve the delivery efficiency of VMAT by extending the recently published VMAT treatment planning algorithm vmerge to automatically generate optimal partial-arc plans. Methods and materials: A high-quality initial plan is created by solving a convex multicriteria optimization problem using 180 equi-spaced beams.
Wala, Jeremiah, Salari, Ehsan, Chen, Wei, Craft, David   +3 more
openaire   +4 more sources

Modern Radiotherapy for a Medieval Malady: An Analysis of Treatment Toxicities for Locally Advanced Head and Neck Cancers [PDF]

Middle East Journal of Cancer, 2021
Background: Concurrent chemo-radiation has proven to be beneficial in a majority of patients with locally advanced head and neck cancers. Despite modern techniques of radiation delivery, the trade-off is acute and entails late toxicities for a ...
Fathima Almas, Anshul Singh, Krishna Sharan, Shirley Lewis, Sannareddy Reddy, Umesh Velu, Priyanka Augustine   +6 more
doaj   +1 more source

Reducing low-dose exposure in helical TomoTherapy for locally advanced left-sided breast cancer with a deformable image registration-based dose-mimicking workflow. [PDF]

J Appl Clin Med Phys
Abstract Background Helical TomoTherapy provides highly conformal dose distributions for breast irradiation but is limited by extensive low‐dose spillage (“low‐dose bath”), contributing to increased integral dose and potential long‐term toxicities. Complete blocks can suppress low‐dose spread, but at the cost of prolonged treatment times on legacy ...
Chang CC, Tsai JT, Hsu SM.
europepmc   +2 more sources

Multi-Planar VMAT Plans for High-Grade Glioma and Glioblastoma Targeting the Hypothalamic-Pituitary Axis Sparing

Life, 2022
Background: This study aimed to identify the better arc configuration of volumetric modulated arc therapy (VMAT) for high-grade glioma and glioblastoma, focusing on a dose reduction to the hypothalamic–pituitary axis through an analysis of dose ...
Eva Y. W. Cheung, Shirley S. H. Ng, Sapphire H. Y. Yung, Dominic Y. T. Cheng, Fandy Y. C. Chan, Janice K. Y. Cheng   +5 more
doaj   +1 more source

Modified VMAT Plans for Locally Advanced Centrally Located Non-Small Cell Lung Cancer (NSCLC)

Life, 2021
Objectives: This study aimed to find the optimal radiotherapy VMAT plans, that achieved high conformity and homogeneity to the planned target volume (PTV), and minimize the dose to nearby organs at risk including the non-PTV lung, heart and oesophagus ...
Eva Y. W. Cheung, Virginia H. Y. Kwong, Fandy Y. C. Chan, Dominic Y. T. Cheng, Janice K. Y. Cheng, Sapphire H. Y. Yung, Kiris T. K. Chan, Kelly T. Y. Cheung, Tracy S. W. Cheung, Janna C. L. Yiu   +9 more
doaj   +1 more source

Dosimetric evaluation of the benefit of deep inspiration breath hold (DIBH) for locoregional irradiation of right breast cancer with volumetric modulated arctherapy (VMAT)

Acta oncologica, 2023
Introduction Right-lateralized cardiac substructures can be substantially exposed during right breast cancer (R-BC) radiotherapy. The cardiac benefit of deep inspiration breath hold (DIBH) is established in combination with volumetric modulated ...
P. Loap, J. Vu-Bezin, V. Monceau, S. Jacob, A. Fourquet, Y. Kirova   +5 more
semanticscholar   +1 more source

Volumetric modulated arc therapy (VMAT): a review of clinical outcomes—what is the clinical evidence for the most effective implementation?

British Journal of Radiology, 2022
Modern conformal radiation therapy using techniques such as modulation, image guidance and motion management have changed the face of radiotherapy today offering superior conformity, efficiency, and reproducibility to clinics worldwide.
Sherisse Ornella Hunte, C. Clark, N. Zyuzikov, A. Nisbet   +3 more
semanticscholar   +1 more source

Cardiac dose in the treatment of synchronous bilateral breast cancer patients between three different radiotherapy techniques (VMAT, IMRT, and 3D CRT)

Discover Oncology, 2023
Purpose Synchronous bilateral irradiation of both mammary glands and chest wall is a challenging task due to technical difficulties and limited evidence supporting an optimal technique to improve treatment outcomes.
N. Salim, A. Popodko, K. Tumanova, A. Stolbovoy, Irina Lagkueva, Vadim Ragimov   +5 more
semanticscholar   +1 more source