Results 41 to 50 of about 8,715 (199)

Comparison of electronic portal imaging device-based Winston–Lutz analysis software

South African Journal of Oncology
Background: Stereotactic radiosurgery (SRS) with a linear accelerator requires submillimetre geometric accuracy. The Winston–Lutz (WL) test verifies coincidence among radiation, mechanical, and imaging isocentres.
Hein Fourie, Carolien de Ridder, Sakhele Shiba   +2 more
doaj   +1 more source

EPID-Based Setup Error Correction in Head and Neck Radiotherapy [PDF]

Iranian Journal of Medical Physics
Introduction: This study introduces and evaluates a novel optimized averaging method for Electronic Portal Imaging Device (EPID)-based setup corrections, comparing it with conventional approaches.
Mohamad Pursamimi, Mahdi Ghorbani, Mehdi Khosravi, Seyed Mohammad Hosseini, Ahmad Shakeri, Sibusiso Mdletshe   +5 more
doaj   +1 more source

Dose calibration of EPIDs for segmented IMRT dosimetry [PDF]

Journal of Applied Clinical Medical Physics, 2014
The purpose of this study was to investigate the dose response of amorphous silicon (a‐Si) electronic portal imaging devices (EPIDs) under different acquisition settings for both open jaw defined fields and segmented intensity‐modulated radiation therapy (IMRT) fields. Four different EPIDs were used.
Deshpande, S, Xing, A, Holloway, L, Metcalfe, P, Vial, P   +4 more
openaire   +3 more sources

EPID – a useful interfraction QC tool

Polish Journal of Medical Physics and Engineering, 2019
Abstract Biomedical accelerators used in radiotherapy are equipped with detector arrays which are commonly used to obtain the image of patient position during the treatment session. These devices use both kilovolt and megavolt x-ray beams.
Klimas, Aleksandra, Grządziel, Aleksandra, Płaza, Dominika, Bekman, Barbara, Woźniak, Bożena, Dolla, Łukasz, Osewski, Wojciech, Paściak, Paweł, Wendykier, Jacek, Ślosarek, Krzysztof   +9 more
openaire   +3 more sources

In silico investigation of factors affecting the MV imaging performance of a novel water-equivalent EPID [PDF]

, 2016
Purpose A GEANT4 model of a novel, water-equivalent electronic portal imaging device (EPID) prototype for radiotherapy imaging and dosimetry utilising an array of plastic scintillating fibres (PSFs) has been developed.
Cheng, Z, Vial, P, Lu, M, Kuncic, Z, Blake, SJ, Atakaramians, S ; https://orcid.org/, Meikle, S   +6 more
core   +1 more source

DVH consistency comparison of EPID reconstruction and CBCT-guided EPID reconstruction with TPS simulation for phantom left shift.

, 2019
(a) TPS simulation. (b) CBCT-guided EPID reconstruction. (c) EPID reconstruction.
Yinghui Li (237776), Jinping Shi (2552869), Jinhan Zhu (4282141), Lixin Chen (300749), Xiaowei Liu (146283)   +4 more
core   +1 more source

Carrion ecology: concepts, interdisciplinary synthesis, and perspectives

Biological Reviews, EarlyView.
ABSTRACT Carrion is a ubiquitous resource in both terrestrial and aquatic ecosystems, yet it has long been overlooked in ecological research. Over the past two decades, studies on carrion and the many organisms that exploit it have flourished, revealing not only wide‐ranging ecological functions but also significance far beyond ecology.
Marcos Moleón, José A. Sánchez‐Zapata, Travis L. DeVault, Wayne M. Getz, Zebensui Morales‐Reyes, Daniel Redondo‐Gómez, Lara Naves‐Alegre, Solange A. Batista‐Nunes, Esther Sebastián‐González, Juan M. Pérez‐García, Kelly A. Waters, Thijs van Overveld, Craig Smith, Nuria Selva, Thomas A. Schlacher, Graeme Ruxton, Jesús Rodríguez, Martina‐M. Quaggiotto, Paula L. Perrig, Norman Owen‐Smith, Thomas M. Newsome, Isabel Navas, Yoshihiro Nakashima, Ana Mateos, Carlos Martínez‐Carrasco, Daniel Martín‐Vega, Berta Martín‐López, Antoni Margalida, Sergio A. Lambertucci, Adam Kane, Kevin Healy, Akane Hashizume, Antonio J. García‐Fernández, José A. Donázar, M. Eric Benbow, James C. Beasley, Philip S. Barton, Kathleen A. Alexander, Eneko Arrondo   +38 more
wiley   +1 more source

Supercritical Fluid Chromatography for Expedited Sample Clean‐Up in Isotope Ratio Mass Spectrometry Including Cholesterol as New Endogenous Reference Compound

Drug Testing and Analysis, EarlyView.
Supercritical fluid chromatography was employed in the sample preparation for IRMS determinations in sports drug testing for the first time and the developed method was successfully validated. Cholesterol (CHOL) was introduced as a novel endogenous reference compound and population‐based Δ‐values were established as shown here.
Thomas Piper, Jana Drewes, Mario Thevis
wiley   +1 more source

Diverse Uses of Lantibiotics: Exploring New Approaches to Combat Antibiotic Resistance

Medicine Advances, EarlyView.
This review illustrates lantibiotics as an alternative therapeutic approach to combat antibiotic resistance, highlighting their diverse sources, including plants, insects, animals, and microorganisms. It further emphasizes their broad therapeutic potential, including antibacterial, antifungal, antiparasitic, antiviral, and anticancer activities (GA ...
Gopalarethinam Janani, Shangavy Pandiarajan, Kunal Biswas, Manickam Rajkumar, Agnishwar Girigoswami, Koyeli Girigoswami   +5 more
wiley   +1 more source

A method for determining the performance of formulas for calculating the crack width and spacing in reinforced concrete elements

Structural Concrete, EarlyView.
Abstract Numerous studies have been conducted to determine the performance of formulas for calculating crack width and spacing in reinforced concrete structures. Generally, these studies pay limited attention to the application areas of those formulas and how to compare different representations of the crack width and spacing.
Anton van der Esch, Rob Wolfs, Simon Wijte   +2 more
wiley   +1 more source