Integration of high velocity test object motion into a channelized Hotelling observer for the assessment of x-ray angiography systems

2019 ◽  
Vol 64 (18) ◽  
pp. 185011
Author(s):  
Ashley Tao ◽  
Kenneth Fetterly
Keyword(s):  
High Velocity ◽  
Test Object ◽  
Object Motion ◽  
X Ray ◽  
Hotelling Observer ◽  
Channelized Hotelling Observer

scholarly journals Implementation of a channelized Hotelling observer model to assess image quality of x-ray angiography systems

2015 ◽  
Vol 2 (1) ◽  
pp. 015503 ◽  
Author(s):  
Christopher P. Favazza ◽  
Kenneth A. Fetterly ◽  
Nicholas J. Hangiandreou ◽  
Shuai Leng ◽  
Beth A. Schueler
Keyword(s):  
Image Quality ◽  
X Ray ◽  
Hotelling Observer ◽  
Observer Model ◽  
Channelized Hotelling Observer

scholarly journals Effects of Sintering Temperature on Densification, Microstructure and Mechanical Properties of Al-Based Alloy by High-Velocity Compaction

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 218
Author(s):  
Xianjie Yuan ◽  
Xuanhui Qu ◽  
Haiqing Yin ◽  
Zaiqiang Feng ◽  
Mingqi Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Velocity ◽  
Sintered Density ◽  
Sintering Temperature ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Transmission Electron ◽  
High Velocity Compaction ◽  
Sintered Temperature

This present work investigates the effects of sintering temperature on densification, mechanical properties and microstructure of Al-based alloy pressed by high-velocity compaction. The green samples were heated under the flow of high pure (99.99 wt%) N2. The heating rate was 4 °C/min before 315 °C. For reducing the residual stress, the samples were isothermally held for one h. Then, the specimens were respectively heated at the rate of 10 °C/min to the temperature between 540 °C and 700 °C, held for one h, and then furnace-cooled to the room temperature. Results indicate that when the sintered temperature was 640 °C, both the sintered density and mechanical properties was optimum. Differential Scanning Calorimetry, X-ray diffraction of sintered samples, Scanning Electron Microscopy, Energy Dispersive Spectroscopy, and Transmission Electron Microscope were used to analyse the microstructure and phases.

Can a channelized Hotelling observer assess image quality in acquired mammographic images of an anthropomorphic breast phantom including image processing?

2019 ◽  
Vol 46 (2) ◽  
pp. 714-725 ◽  
Author(s):  
C. Balta ◽  
R. W. Bouwman ◽  
I. Sechopoulos ◽  
M. J. M. Broeders ◽  
N. Karssemeijer ◽  
...  
Keyword(s):  
Image Processing ◽  
Image Quality ◽  
Mammographic Images ◽  
Hotelling Observer ◽  
Breast Phantom ◽  
Channelized Hotelling Observer

scholarly journals Use of a channelized Hotelling observer to assess CT image quality and optimize dose reduction for iteratively reconstructed images

2017 ◽  
Vol 4 (03) ◽  
pp. 1 ◽  
Author(s):  
Christopher P. Favazza ◽  
Andrea Ferrero ◽  
Lifeng Yu ◽  
Shuai Leng ◽  
Kyle L. McMillan
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Ct Image ◽  
Hotelling Observer ◽  
Ct Image Quality ◽  
Channelized Hotelling Observer

scholarly journals Imprints of a high-velocity wind on the soft X-ray spectrum of PG1211+143

2016 ◽  
Vol 459 (4) ◽  
pp. 4389-4396 ◽  
Author(s):  
K. A. Pounds ◽  
A. Lobban ◽  
J. N. Reeves ◽  
S. Vaughan ◽  
M. Costa
Keyword(s):  
High Velocity ◽  
X Ray

scholarly journals The X-ray view of the Wolf-Rayet stars

1995 ◽  
Vol 163 ◽  
pp. 429-437
Author(s):  
A.M.T. Pollock
Keyword(s):  
High Velocity ◽  
X Ray ◽  
Wide Range ◽  
Colliding Winds

Ever since the earliest work, X-ray observations have been central in the chequered development of the study of interacting high-velocity winds in binaries. This review assesses how confidently the observations of Wolf-Rayet stars may be interpreted as the result of colliding winds, drawing attention to the wide range of X-ray luminosities even among the relatively bright binaries. Although the data do not generally conform to the simplest binary models, some suggestions are made to reconcile theory and observation.

scholarly journals Microstructure, Mechanical Properties and Wear Behavior of High-Velocity Oxygen-Fuel (HVOF) Sprayed (Cr3C2-NiCr+Al) Composite Coating on Ductile Cast Iron

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 840 ◽  
Author(s):  
Marzanna Ksiazek ◽  
Lukasz Boron ◽  
Adam Tchorz
Keyword(s):  
Cast Iron ◽  
Electron Microscope ◽  
High Velocity ◽  
Bending Strength ◽  
Wear Behavior ◽  
Ductile Cast Iron ◽  
Wear Behaviour ◽  
Wear Properties ◽  
Alloy Matrix ◽  
X Ray

In the present work Cr3C2-NiCr powder containing Al particles was deposited on ductile cast iron with high-velocity oxy-fuel (HVOF) thermal spray coating technique. An investigation was conducted to determine the role of Al particles in the Cr3C2-NiCr coating produced with HVOF technique on microstructure, mechanical and wear properties in a system Cr2C3-NiCr coating/ductile cast iron. The microstructure of the HVOF-sprayed Cr3C2-NiCr+Al coating was characterized by light microscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and energy dispersive X-ray spectroscopy (EDS). Microstructure analysis reveals the formation of coating with low porosity, good adhesion to the substrate and dense structure with irregularly shaped particles of Al arranged in strips and finely fragmented Cr3C2 particles embedded in a nanocrystalline Ni-Cr alloy matrix. In addition, the results were discussed in reference to examination of bending strength considering cracking and delamination in the system of (Cr3C2-NiCr+Al)/ductile cast iron as well as microhardness and wear resistance of the coating. It was found that the addition of Al particles significantly increased resistance to cracking and wear behaviour in the studied system.

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