Results 131 to 140 of about 25,193 (285)

A Correction of the Gamma Test for Monte Carlo Dose Distributions Comparison

, 2018
PURPOSE For QA and commissioning purposes, the gamma index is often used to compare two dose distributions. However, this method is known to be asymetric and dependent on the resolution and noise.
Sterpin, Edmond, AAPM, Souris, Kevin, Cohilis, Marie, Lee, John Aldo   +4 more
core  

Predicting the PSQA results of volumetric modulated arc therapy based on dosiomics features: a multi-center study

Frontiers in Physics
Backgroud and objectivesThe implementation of patient-specific quality assurance (PSQA) has become a crucial aspect of the radiation therapy process. Machine learning models have demonstrated their potential as virtual QA tools, accurately predicting the
Qianxi Ni, Qianxi Ni, Luqiao Chen, Jianfeng Tan, Jinmeng Pang, Longjun Luo, Jun Zhu, Xiaohua Yang   +7 more
doaj   +1 more source

Precipitation Simulations of the O‐Phase in Ti2AlNb Alloys Processed by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Simulated and experimental evolution of the O‐phase volume fraction during postprocessing of a Ti‐21Al‐25Nb (at.%) alloy processed by laser powder bed fusion. With results of sensitivity to input parameters from a thorough and quantified analysis, the interfacial energy matrix/precipitate is the most relevant input parameter for the simulation of the O‐
Silvana Tumminello, Joachim Gussone, Suzana G. Fries, Marcus Rackel, Andreas Stark, Norbert Schell, Jan Haubrich, Guillermo Requena   +7 more
wiley   +1 more source

The correlation of the modulation complexity score (MCS) with the number of segments and local gamma passing rate for the Intensity Modulated Radiation Therapy (IMRT) treatment planning delivery

Objective: To compare the modulation complexity scores across treatment sites, and to examine their connection with monitor unit, segment number and global and local gamma passing percentage. Method: The cross-sectional study was conducted at the Baghdad
Nabaa Mohammad. Alazawy, Siham Sabah Abdullah, Haydar Hamza Alabedi, Ali Majeed Hassan, Mustafa Jabbar Al-Musawi, Omar Najah Jubbier   +5 more
core   +2 more sources

Advanced Electron Microscopy and Microcomputed Tomography Analysis of Single‐Crystal Ni‐Base Superalloys After Short‐Term Multiaxial Creep

Advanced Engineering Materials, EarlyView.
This work studies the anisotropic behavior of circular notched tensile specimens of Ni‐base superalloy single crystals during high‐temperature tensile creep along [001], [110], and [111]. Correlative scale‐bridging imaging of specimens reveals early rupture along [110] because 1) plastic deformation proceeds faster at notch center; 2) more (brittle ...
Leonardo Agudo Jácome, Lijie Cao, Christoph Somsen, Johannes Boes, René Hesse, Werner Theisen, Gunther Eggeler   +6 more
wiley   +1 more source

Setting the Tolerance and Action Limit for Patient-specific Quality Assurance of Craniospinal Irradiation Volumetric Modulated Arc Therapy: Based on AAPM TG-218 Report

Journal of Medical Physics
Purpose: The purpose of this study was to investigate the tolerance limits (TL) and action limits (AL) in gamma passing rate for craniospinal irradiation volumetric modulated arc therapy (VMAT) treatment plans.
Sathiya Raj, Sathiyan Saminathan, Kiruthika Prakasam   +2 more
doaj   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Wobbling nature of gamma passing rate as a function of calibration field sizes in patient-specific quality assurance

Journal of Radiotherapy in Practice
Abstract Purpose: This study aimed to investigate the influence of calibration field size on the gamma passing rate (GPR) in patient-specific quality assurance (PSQA). Methods: Two independent detectors, PTW OCTAVIUS 4D (4DOCT) and Arc Check, were utilised in volumetric modulated arc therapy plans for 26 patients (14 ...
Sathiya Raj, Venugopal Sundaram, Henry Finlay Godson, Retna John   +3 more
openaire   +1 more source

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

A method to determine the distance, shielding and activity of orphan 137Cs sources in mobile gamma spectrometric search

A mobile gamma spectrometer's series of pulse height distributions (gamma spectra) acquired when passing a point source contains enough information to derive the distance to the source, its shielding and activity.
Finck, Robert, Rääf, Christopher, Jönsson, Mattias, Dinca, Marius Catalin   +3 more
core   +1 more source