Results 41 to 50 of about 16,180 (297)

Multicriteria optimization informed VMAT planning [PDF]

Medical Dosimetry, 2014
We developed a patient-specific volumetric-modulated arc therapy (VMAT) optimization procedure using dose-volume histogram (DVH) information from multicriteria optimization (MCO) of intensity-modulated radiotherapy (IMRT) plans. The study included 10 patients with prostate cancer undergoing standard fractionation treatment, 10 patients with prostate ...
H Chen, David P. Gierga, David Craft
openaire   +2 more sources

Comparison of Carotid Artery Dose in Early-Stage Glottic Cancer Treated with 3D-Conformal, Helical-IMRT and VMAT

Forum of Clinical Oncology, 2023
The aim of this study was to compare the dosimetry of carotid arteries (CAs) using three radiation therapy (RT) techniques, three-dimensional conformal RT (3D-CRT), helical tomotherapy-intensity-modulated RT (HT-IMRT), and volumetric modulated arc ...
Pires B, Rothwell D, Guimarães I, Sousa J, Magalhães R, Serra T, Khouri L, Alves P   +7 more
doaj   +1 more source

HyperArc VMAT planning for single and multiple brain metastases stereotactic radiosurgery: a new treatment planning approach

Radiation Oncology, 2018
Purpose The HyperArc VMAT (HA-VMAT) planning approach was newly developed to fulfill the demands of dose delivery for brain metastases stereotactic radiosurgery.
Shingo Ohira, Yoshihiro Ueda, Yuichi Akino, Misaki Hashimoto, Akira Masaoka, Takero Hirata, Masayoshi Miyazaki, Masahiko Koizumi, Teruki Teshima   +8 more
doaj   +1 more source

Noncoplanar VMAT for Brain Metastases: A Plan Quality and Delivery Efficiency Comparison With Coplanar VMAT, IMRT, and CyberKnife [PDF]

Technology in Cancer Research & Treatment, 2019
Purpose: To compare plan quality and delivery efficiency of noncoplanar volumetric modulated arc therapy with coplanar volumetric modulated arc therapy, intensity-modulated radiation therapy, and CyberKnife for multiple brain metastases. Methods: For 15 patients with multiple brain metastases, noncoplanar volumetric modulated arc therapy, coplanar ...
Shuming Zhang, Ruijie Yang, Chengyu Shi, Jiaqi Li, Hongqing Zhuang, Suqing Tian, Junjie Wang   +6 more
openaire   +3 more sources

Effective Organs-at-Risk Dose Sparing in Volumetric Modulated Arc Therapy Using a Half-Beam Technique in Whole Pelvic Irradiation

Frontiers in Oncology, 2021
BackgroundAlthough there are some controversies regarding whole pelvic radiation therapy (WPRT) due to its gastrointestinal and hematologic toxicities, it is considered for patients with gynecological, rectal, and prostate cancer.
Hyunsoo Jang, Jiyeon Park, Jiyeon Park, Mark Artz, Mark Artz, Yawei Zhang, Yawei Zhang, Jacob C. Ricci, Soon Huh, Soon Huh, Perry B. Johnson, Perry B. Johnson, Mi-Hwa Kim, Mison Chun, Young-Taek Oh, O Kyu Noh, Hae-Jin Park   +16 more
doaj   +1 more source

Comparison of dosimetric characteristics between flattening filter‐free and flattening filter mode volumetric‐modulated arc therapy plans in rectal cancer

Precision Radiation Oncology, 2021
Objective We aimed to compare the dosimetric characteristics of 6‐MV flattening filter mode (FF) and flattening filter‐free mode (FFF) volumetric‐modulated arc therapy (VMAT) plans in preoperative radiotherapy for rectal cancer using an Edge linear ...
Zhen Ding, Xiaoyong Xiang, Kailian Kang, Qi Zeng, Qingqing Yuan, Meiling Xu   +5 more
doaj   +1 more source

Sub-second photon dose prediction via transformer neural networks [PDF]

, 2022
Fast dose calculation is critical for online and real time adaptive therapy workflows. While modern physics-based dose algorithms must compromise accuracy to achieve low computation times, deep learning models can potentially perform dose prediction tasks with both high fidelity and speed. We present a deep learning algorithm that, exploiting synergies
arxiv   +1 more source

Dosimetric and clinical outcomes after volumetric modulated arc therapy for carcinoma of the thoracic esophagus

Advances in Radiation Oncology, 2017
Purpose: The efficiency of radiation delivery via volumetric modulated arc therapy (VMAT) is indisputable, but outcomes after VMAT for thoracic esophageal carcinoma are largely unknown.
Cai Xu, MD, Mian Xi, MD, Ritsuko Komaki, MD, Peter A. Balter, PhD, Meilin Huang, PhD, Brian P. Hobbs, PhD, Luhua Wang, MD, Steven H. Lin, MD, PhD   +7 more
doaj   +1 more source

Evaluation of Hybrid VMAT Advantages and Robustness Considering Setup Errors Using Surface Guided Dose Accumulation for Internal Lymph Mammary Nodes Irradiation of Postmastectomy Radiotherapy

Frontiers in Oncology, 2022
ObjectivesSetup error is a key factor affecting postmastectomy radiotherapy (PMRT) and irradiation of the internal mammary lymph nodes is the most investigated aspect for PMRT patients.
Zhe Zhang, Daming Li, Feng Peng, Zhibo Tan, Pengfei Yang, Zhaoming Peng, Xin Li, Xin Li, Xinyue Qi, Weixiao Sun, Yajie Liu, Yajie Liu, Yuenan Wang, Yuenan Wang   +13 more
doaj   +1 more source

Ultra-fast treatment plan optimization for volumetric modulated arc therapy (VMAT) [PDF]

, 2010
Purpose: To develop a novel aperture-based algorithm for volumetric modulated arc therapy (VMAT) treatment plan optimization with high quality and high efficiency. Methods: The VMAT optimization problem is formulated as a large-scale convex programming problem solved by a column generation approach. We consider a cost function consisting two terms, the
arxiv   +1 more source