Explanipedia

ATUAÇÃO DA ENFERMAGEM NA PREVENÇÃO DO SUICÍDIO EM SERVIÇOS DE SAÚDE Open

S.G. Azevedo, Bárbara Raissa Rocha De Azevedo · 2025

Vacuum Hohlraum Energetic Experiments on the National Ignition Facility Open

J. L. Kline, G. A. Kyrala, S. H. Glenzer, K. Widmann, Rick Olson , et al. · 2024

Achievement of Target Gain Larger than Unity in an Inertial Fusion Experiment Open

H. Abu-Shawareb, Robert L. Acree, P. A. Adams, John J. Adams, B. Addis , et al. · 2024

On December 5, 2022, an indirect drive fusion implosion on the National Ignition Facility (NIF) achieved a target gain Gtarget of 1.5. This is the first laboratory demonstration of exceeding “scientific breakeven” (or Gtarget>1) where 2.05…

System-independent characterization of materials using dual-energy computed tomography Open

Isaac Seetho, Maurice B. Aufderheide, S.G. Azevedo, William D. Brown, Kyle Champley , et al. · 2023

A system for characterizing the material of an object scanned via a dual-energy computed tomography scanner is provided. The system generates photoelectric and Compton sinograms based on a photoelectric-Compton decomposition of low-energy …

Computerized ultrasound risk evaluation system Open

Nebojsa Duric, Peter J. Littrup, III Holsapple, Robert Henry Barter, Thomas Moore , et al. · 2023

A method and system for examining tissue are provided in which the tissue is maintained in a position so that it may be insonified with a plurality of pulsed spherical or cylindrical acoustic waves. The insonifying acoustic waves are scatt…

Lawson Criterion for Ignition Exceeded in an Inertial Fusion Experiment Open

H. Abu-Shawareb, Robert L. Acree, P. A. Adams, John J. Adams, B. Addis , et al. · 2022

For more than half a century, researchers around the world have been engaged in attempts to achieve fusion ignition as a proof of principle of various fusion concepts. Following the Lawson criterion, an ignited plasma is one where the fusi…

Fourier method for 3-dimensional data fusion of X-ray Computed Tomography and ultrasound Open

W. Marshall Leach, Jordan S. Lum, Kyle Champley, S.G. Azevedo, Casey Gardner , et al. · 2021

Livermore tomography tools: Accurate, fast, and flexible software for tomographic science Open

Kyle Champley, Trevor M. Willey, Hyojin Kim, Karina Bond, Steven Glenn , et al. · 2021

TP099-CT-800DR Comparison Between SIRZ-2 and Surface Fit Method ($ρ_{e},Ζ_{e}$) Estimation Open

J.S. Kallman, S.G. Azevedo, Isaac Seetho, H.E. Martz · 2021

The primary objective of this test plan is to acquire dual-energy computed tomography (CT) data of 33 well-known specimens using the Leidos Reveal CT-80DR+ baggage scanner housed at LLNL (hereafter referred to as CT-80DR). These data sets …

A Comparison of Ultrasound Tomography Methods in Circular Geometry Open

Richard R. Leach, S.G. Azevedo, J.G. Berryman, H R Bertete-Aquirre, David H. Chambers , et al. · 2021

Extremely high quality data was acquired using an experimental ultrasound scanner developed at Lawrence Livermore National Laboratory using a 2D ring geometry with up to 720 transmitter/receiver transducer positions. This unique geometry a…

Method to Extract System-Independent Material Properties From Dual-Energy X-Ray CT Open

Kyle Champley, S.G. Azevedo, Isaac Seetho, Steven Glenn, Larry McMichael , et al. · 2019

In 2016, we published a method for processing dual-energy computed tomography (DECT) data called system-independent rho-e/Z-e (ρ_e/Z_e) or SIRZ. Using data from multiple DECT systems and spectra, SIRZ estimated the elec…

An Overview of Nondestructive Evaluation and Characterization at Lawrence Livermore National Laboratory Open

Jolyon A. Browne, H.E. Martz, S.G. Azevedo, Joseph W. Tringe · 2018

For more than 60 years, Lawrence Livermore National Laboratory (LLNL) has developed and employed advanced technologies in both nondestructive evaluation (NDE) and nondestructive characterization (NDC) to enhance national security. Additona…

Characterization of a spectroscopic detector for application in x-ray computed tomography Open

Alex A. Dooraghi, B. Fix, Jerel A. Smith, William L. Brown, S.G. Azevedo , et al. · 2017

Recent advances in cadmium telluride (CdTe) energy-discriminating pixelated detectors have enabled the possibility of Multi-Spectral X-ray Computed Tomography (MSXCT) to incorporate spectroscopic information into CT. MultiX ME 100 V2 is a …

System-Independent Characterization of Materials Using Dual-Energy Computed Tomography Open

S.G. Azevedo, H.E. Martz, Maurice B. Aufderheide, William D. Brown, Kyle Champley , et al. · 2016

In this study, we present a new decomposition approach for dual-energy computed tomography (DECT) called SIRZ that provides precise and accurate material description, independent of the scanner, over diagnostic energy ranges (30 to 200 keV…

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