Results 51 to 60 of about 3,312 (171)

Comparison of Different Algorithms in the Radiotherapy Plans of Breast Cancer

ITM Web of Conferences, 2018
It is aimed to evaluate portal dosimetry results of planned breast cancer patients with intensity-modulated radiotherapy (YART) of Anisotropic Analytical Algorithm (AAA) and Pencil Beam Convolution (PBC) dose calculation algorithms.
Çelen Yonca Yahşi, Evcin Atilla
doaj   +1 more source

Impact of dose rate on accuracy of intensity modulated radiation therapy plan delivery using the pretreatment portal dosimetry quality assurance and setting up the workflow at hospital levels

Journal of Medical Physics, 2015
The aim of this study was to examine the impact of dose rate on accuracy of intensity modulated radiation therapy (IMRT) plan delivery by comparing the gamma agreement between the calculated and measured portal doses by pretreatment quality assurance (QA)
Karunakaran Kaviarasu, N Arunai Nambi Raj, K Krishna Murthy, A Ananda Giri Babu, Bhaskar Laxman Durga Prasad   +4 more
doaj   +1 more source

Dosimetric correlation between exit dose maps and anatomical changes in head and neck cancer treatment on Halcyon‐E: A gamma analysis approach

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Background Head and neck cancer (HNC) has a high incidence in Brazil. Although Image‐Guided Radiation Therapy (IGRT) improves treatment precision, anatomical changes during the treatment course may compromise dose distribution and require replanning.
Jayane Julia Pereira da Silva, Caio Weber Mendanha Ribeiro, Jaime Luiz Ludwig, Daniela Rocha Medrado, Bruno Nunes Melo da Silva, Ayane Cristine Alves Sarmento, Edilmar de Moura Santos   +6 more
wiley   +1 more source

Transit dosimetry of stereotactic body radiotherapy treatments with electronic portal dosimetry device in patient with spinal implant

Physical and Engineering Sciences in Medicine, 2022
Abstract Aim In recent years, the use of the Electronic Portal Imaging Device (EPID) as an in vivo dosimeter has become widespread. However, reports of EPID for stereotactic body radiotherapy (SBRT) applications is scarce. There is no data on this topic especially when there are high-density materials in the radiation field.
Yağız Yedekci, Aysenur Elmalı, Gökhan demirkıran, Gökhan Özyigit, Gözde Yazıcı   +4 more
openaire   +2 more sources

Clinical Efficacy of an Electronic Portal Imaging Device versus a Physical Phantom Tool for Patient-Specific Quality Assurance

Life, 2022
Pre-treatment patient-specific quality assurance (QA) is critical to prevent radiation accidents. The electronic portal imaging device (EPID) is a dose measurement tool with good resolution and a low volume-averaging effect.
Seung-Hyeop Baek, Sang-Hyoun Choi, Moo-Jae Han, Gyu-Seok Cho, Wonil Jang, Jin-Sung Kim, Kum-Bae Kim   +6 more
doaj   +1 more source

K‐Edge imaging using a clinical dual‐source photon‐counting CT system

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Background Photon‐counting CT (PCCT) enables K‐edge imaging, an advanced multi‐material decomposition technique that requires multiple energy bins to perform decomposition unconstrained by physical assumptions. The clinical implementation of K‐edge imaging applications like dual‐contrast imaging could lead to reductions in radiation dose and ...
Martin V. Rybertt, Leening P. Liu, Pooyan Sahbaee, Tristan Nowak, Manoj Mathew, Harold I. Litt, David P. Cormode, Ali H. Dhanaliwala, Peter B. Noël   +8 more
wiley   +1 more source

Evaluation of HyperArc™ using film and portal dosimetry quality assurance

Physical and Engineering Sciences in Medicine, 2022
Abstract HyperArc™ is a stereotactic radiotherapy modality designed for targeting multiple brain metastases using a single isocenter with multiple non-coplanar arcs. The purpose of this study was to assess the efficacy of two patient specific quality assurance methods, film and the Varian Portal Dosimetry System with Varian’s HyperArc ...
Onno Kamst, Pushkar Desai
openaire   +2 more sources

Comparison of EPID portal dosimetry verification and RadCalc dose verification for VMAT treatment plans

Nowotwory
INTRODUCTION: Dosimetry verification is required before starting each treatment. The legal regulations do not clearly define one method of plan verification.
Adam Gądek, Dominika Plaza, Łukasz Sroka, Marta Reudelsdorf-Ullmann, Krzysztof Ślosarek   +4 more
doaj   +1 more source

Evaluating synthetic CT from deformable registration in directed adaptive radiotherapy for head and neck cancer

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Background and purposel Anatomical changes over the many weeks of radiotherapy for Head and Neck cancer patients can compromise the original treatment plan, potentially increase the risk of side effects and impact outcomes. It is difficult to decide, based on daily imaging alone, which patients will most benefit from adapted treatment plans ...
Jessica Lye, Kartik Kumar, Benjamin Harris, Jarrod Prohasky, Leah McDermott, Simon Goodall, Jothy Selvaraj, Lauren Natoli, Morikatsu Wada, Sweet Ping Ng   +9 more
wiley   +1 more source

A Comparison of Planned Dose in TBI VMAT Treatment with Dosimetry Using Portal Dosimetry® and IBA MatriXX®

Brazilian Journal of Radiation Sciences
Bone Marrow Transplant (BMT) is an essential therapeutic intervention in the treatment of diseases such as leukemia and lymphoma, where Total Body Irradiation (TBI) plays a crucial role by eradicating residual diseases and inducing immunosuppression ...
Juan Sousa, I Lima, D Olbi, Lucas Nascimento, Andre Fidelis, Maria Luiza Maciel, Luiz da Rosa, Simone Coutinho Cardoso   +7 more
doaj   +1 more source