Airway quantification using adaptive statistical iterative reconstruction-V on wide-detector low-dose CT: a validation study on lung specimen

AbstractPurposeTo evaluate the accuracy of airway quantification of adaptive statistical iterative reconstruction (ASIR)-V on low-dose CT using a human lung specimen.MethodA lung specimen was scanned on Revolution CT with low-dose settings (20  mAs, 40 mAs and 60 mAs/100 kV) and standard-dose setting (100 mAs/120 kV). CT images were reconstructed using lung kernel with eleven ASIR-V levels from 0 to 100% with 10% interval. ASIR-V level from 0 to 100% with 10% interval was reconstructed on lung kernel. Wall area percentage (%WA) and wall thickness (WT) were measured.ResultsRadiation dose of 20  mAs, 40 mAs and 60 mAs low-dose settings reduced by 87.6%, 75.2% and 62.8% compared to that on standard dose, respectively. Low-dose settings significantly decreased image SNR (p 
Source: Japanese Journal of Radiology - Category: Radiology Source Type: research

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Publication date: October 2019Source: The Journal of Supercritical Fluids, Volume 152Author(s): L. Teeter, R. Repukaiti, N. Huerta, R.P. Oleksak, R.B. Thomas, Ö.N. Doğan, M. Ziomek-Moroz, J.D. TuckerAbstractThe corrosion resistance of high-strength low-alloy carbon steel was investigated in simulated conditions that exist in direct supercritical CO2 power cycle heat exchangers. The experiments were performed at 80 bar for 500 h at either 50 °C with samples exposed to H2O-saturated CO2 and CO2-saturated H2O or 250 °C undersaturated CO2. Exposures were conducted with and without O2.Corrosion rates were determin...
Source: The Journal of Supercritical Fluids - Category: Chemistry Source Type: research
Publication date: Available online 19 June 2019Source: Polymer TestingAuthor(s): Mahdi Ashrafi, Ahmad Reza Ghasemi, Masood HamadanianAbstractThis work aimed to develop mechanical/thermal properties of polymer-based nanocomposite in aerospace applications. Hence, herein nanocomposites were prepared through the direct blending of epoxy (EP) with Polyethylene glycol (PEG) and multiwalled carbon nanotubes (MWCNTs) as filler. Weight fraction of fillers was optimized by central composite design (CCD) to get maximum tensile strength and elongation. Interestingly, cross-section scanning electron microscopy (cross-section SEM) and ...
Source: Polymer Testing - Category: Chemistry Source Type: research
Publication date: Available online 18 June 2019Source: Polymer TestingAuthor(s): Xingguo Wang, Jun Sun, Xiaodong Liu, Shengling Jiang, Julin Wang, Hongfei Li, Serge Bourbigot, Xiaoyu Gu, Sheng ZhangAbstractAn effective flame retardant N, N′-bis [salicylidene hypophosphorous acid]-1, 2-ethylenediamine (SHPE) was synthesized by a Kabachnik-Fields reaction between hypophosphorous acid and a Schiff base compound. The chemical structure was confirmed by FTIR, 1HNMR and organic element analysis. SHPE was melt blended with poly (lactic acid) (PLA) matrix to enhance the flame retardancy. Fire behavior evaluation of PLA compo...
Source: Polymer Testing - Category: Chemistry Source Type: research
Publication date: Available online 18 June 2019Source: Polymer Degradation and StabilityAuthor(s): Miroslav Šlouf, Danuše Michálková, Veronika Gajdošová, Jiří Dybal, Jan PilařAbstractPolymer plaques made of high density polyethylene (HDPE) and of two types of cycloolefin copolymer (COC) differing in glass transition temperature, were stabilized with 0.2 or 1.0 wt % of natural (α-tocopherol) or synthetic (Irganox®1010) phenolic stabilizer or hindered amine stabilizer (Tinuvin®770) and aged using accelerated weathering technique (WOM). The efficiency of the p...
Source: Polymer Degradation and Stability - Category: Chemistry Source Type: research
Publication date: Available online 19 June 2019Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Jiling Zhao, Chen Wang, Shixing Wang, Libo Zhang, Bing ZhangAbstractMany industrial wastewaters contain large amounts of palladium and the recovery of palladium from wastewater has great significance. Here, a new adsorbent (PMA-SNP) was synthesized by modifying nano-silica with pyromellitic anhydride to selectively adsorb Pd(II) in wastewater. Fourier transform infrared spectroscopy, scanning electron microscopy, Brunauer–Emmett–Teller equation, X-ray photoelectron spectroscopy and t...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Category: Chemistry Source Type: research
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Source: Chemical Engineering Journal - Category: Chemistry Source Type: research
J. Anal. At. Spectrom., 2019, Accepted Manuscript DOI: 10.1039/C9JA00083F, PaperIrene Del Real Contreras, Louisa Smieska, John Francis Hugh Thompson, Camila Martinez, Jay Thomas, Daniel Layton-Matthews Pyrite (FeS2) chemistry can be used as an indicator for hydrothermal fluid evolution both in low and high temperature environments. Synchrotron scanning x-ray fluorescence is an efficient, non-destructive, imaging technique... The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - J. Anal. At. Spectrom. latest articles - Category: Chemistry Authors: Source Type: research
Bactericidal Effects of Oxidative Stress Generated by EDTA-Fe and Hydrogen Peroxide. Biocontrol Sci. 2019;24(2):97-101 Authors: DU WN, Chen ST Abstract Hydrogen peroxide is widely used as a disinfectant by generating oxidative stress. The chelate of ethylenediaminetetraacetic acid (EDTA) and ferrous iron (EDTA-Fe) was used to increase oxidative stress and bactericidal effects. The Escherichia coli (E. coli) was added to a beef extract culture medium and treated with various doses of test reagents, including hydrogen peroxide, EDTA-Fe chelate, and antioxidants (vitamin C and vitamin E) . All reagen...
Source: Biocontrol Science - Category: Microbiology Tags: Biocontrol Sci Source Type: research
A 67-year-old woman with a history of metastatic melanoma on therapy presented to the oncology clinic with worsening fatigue for 2 weeks. She had subjective fevers, chills, and a pruritic rash. Her melanoma had progressed on pembrolizumab and so she had recently been started on combination therapy with ipilimumab and nivolumab about 3 months previously. Because of concerns for disease progression, she underwent a positron emission tomography –computed tomography (PET-CT) before being seen in the clinic.
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We examined the fixation behaviour of change detectors and non-detectors monitoring dynamic scenes. One hundred ...
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