Quantitative study of fast non-local means-based denoising filter in chest X-ray imaging with lung nodule using three-dimensional printing

Optik ◽  
2019 ◽  
Vol 179 ◽  
pp. 1180-1188 ◽  
Author(s):  
Jina Shim ◽  
Myonggeun Yoon ◽  
Youngjin Lee
Keyword(s):  
Quantitative Study ◽  
Lung Nodule ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
X Ray ◽  
Local Means ◽  
X Ray Imaging ◽  
Chest X Ray ◽  
Non Local ◽  
Dimensional Printing

Digital X-Ray Flat Panel Housing for Operation at Extremely Low Temperatures

2019 ◽  
Vol 942 ◽  
pp. 68-76
Author(s):  
Fedor Simankin ◽  
Jan Miciński ◽  
Evgeniy Shumnyi ◽  
Alexander Shtein ◽  
Ablay Zhunusov
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
Three Dimensional ◽  
Wall Structure ◽  
Flat Panel ◽  
Three Dimensional Printing ◽  
X Ray ◽  
Temperature Conditions ◽  
Dimensional Printing

The paper presents the housing wall structure for the digital X-ray flat panel which can operate in extremely low temperature conditions. A technology of three-dimensional printing is proposed for making the detector housing with heat conductors incorporated in its wall structure.

Three-dimensional printing of X-ray computed tomography datasets with multiple materials using open-source data processing

2017 ◽  
Vol 10 (4) ◽  
pp. 383-391 ◽  
Author(s):  
Ian M. Sander ◽  
Matthew T. McGoldrick ◽  
My N. Helms ◽  
Aislinn Betts ◽  
Anthony van Avermaete ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Data Processing ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
X Ray ◽  
Open Source Data ◽  
Source Data ◽  
X Ray Computed ◽  
Multiple Materials ◽  
Dimensional Printing

scholarly journals Effectiveness of Non-Local Means Algorithm with an Industrial 3 MeV LINAC High-Energy X-ray System for Non-Destructive Testing

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2634 ◽  
Author(s):  
Kyuseok Kim ◽  
Jaegu Choi ◽  
Youngjin Lee
Keyword(s):  
High Energy ◽  
Imaging Systems ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
X Ray ◽  
Local Means ◽  
X Ray Imaging ◽  
Non Local ◽  
Non Destructive

Industrial high-energy X-ray imaging systems are widely used for non-destructive testing (NDT) to detect defects in the internal structure of objects. Research on X-ray image noise reduction techniques using image processing has been widely conducted with the aim of improving the detection of defects in objects. In this paper, we propose a non-local means (NLM) denoising algorithm to improve the quality of images obtained using an industrial 3 MeV high-energy X-ray imaging system. We acquired X-ray images using various castings and assessed the performance visually and by obtaining the intensity profile, contrast-to-noise ratio, coefficient of variation, and normalized noise power spectrum. Overall, the quality of images processed by the proposed NLM algorithm is superior to those processed by existing algorithms for the acquired casting images. In conclusion, the NLM denoising algorithm offers an efficient and competitive approach to overcome the noise problem in high-energy X-ray imaging systems, and we expect the accompanying image processing software to facilitate and improve image restoration.

Three-dimensional printing of ellipsoidal structures using Mercury

CrystEngComm ◽  
2018 ◽  
Vol 20 (3) ◽  
pp. 271-274 ◽  
Author(s):  
Matthew L. Brown ◽  
Ken Van Wieren ◽  
Hamel N. Tailor ◽  
David Hartling ◽  
Anthony Jean ◽  
...  
Keyword(s):  
Crystal Structure ◽  
3D Printing ◽  
Diffraction Data ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Simple Method ◽  
Three Dimensional Printing ◽  
X Ray ◽  
Dimensional Printing

A simple method of 3D printing ellipsoidal crystal structure models from X-ray diffraction data using CCDC Mercury.

Three-Dimensional Printing of Shape Memory Alloys

2007 ◽  
Vol 534-536 ◽  
pp. 477-480 ◽  
Author(s):  
Efrain Carreño-Morelli ◽  
Sebastien Martinerie ◽  
J. Eric Bidaux
Keyword(s):  
Shape Memory ◽  
Metal Powder ◽  
Three Dimensional ◽  
Green Body ◽  
X Ray Diffraction ◽  
Three Dimensional Printing ◽  
X Ray ◽  
Printing Technique ◽  
Novel Variant ◽  
Dimensional Printing

A novel variant of the three-dimensional printing technique has been developed and used to manufacture NiTi parts. Instead of metal powder the process uses granules, which consist of a mixture of metal powder and organic binder. These granules are spread on a working table. Then a solvent is dispensed with a printer head to consolidate a selected area of the granule bed and the table is moved down. The "solvent on granule" printing process is repeated until a threedimensional green body is obtained. The green part is finally debinded and sintered to obtain a dense and fully metallic part. NiTi parts have been successfully produced by this technique with densities of about 95% of the theoretical density. Detailed information on the microstructure has been obtained by X ray diffraction. Sintered parts exhibit shape memory effect, which has been measured during thermal cycling under tensile stress.

Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging

Science ◽  
2019 ◽  
Vol 363 (6429) ◽  
pp. 849-852 ◽  
Author(s):  
Ross Cunningham ◽  
Cang Zhao ◽  
Niranjan Parab ◽  
Christopher Kantzos ◽  
Joseph Pauza ◽  
...  
Keyword(s):  
Cross Sections ◽  
Three Dimensional ◽  
High Energy ◽  
X Rays ◽  
Laser Melting ◽  
Scanning Velocity ◽  
Powder Bed ◽  
Three Dimensional Printing ◽  
X Ray ◽  
X Ray Imaging

We used ultrahigh-speed synchrotron x-ray imaging to quantify the phenomenon of vapor depressions (also known as keyholes) during laser melting of metals as practiced in additive manufacturing. Although expected from welding and inferred from postmortem cross sections of fusion zones, the direct visualization of the keyhole morphology and dynamics with high-energy x-rays shows that (i) keyholes are present across the range of power and scanning velocity used in laser powder bed fusion; (ii) there is a well-defined threshold from conduction mode to keyhole based on laser power density; and (iii) the transition follows the sequence of vaporization, depression of the liquid surface, instability, and then deep keyhole formation. These and other aspects provide a physical basis for three-dimensional printing in laser powder bed machines.

Design and Characterization of New Ti-Ag and Ti-Ag-Sn Alloys for Cranio-Maxillo-Facial Prostheses Made by Three-Dimensional Printing

2000 ◽  
Vol 662 ◽  
Author(s):  
Sang-Bum Hong ◽  
Noam Eliaz ◽  
Gary G. Leisk ◽  
Emanuel M. Sachs ◽  
Ronald M. Latanision ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Optimal Temperature ◽  
X Ray Diffraction ◽  
Three Dimensional Printing ◽  
X Ray ◽  
Electrochemical Tests ◽  
Microhardness Testing ◽  
Facial Prostheses ◽  
Dimensional Printing

Abstractnew Ti-5Ag and Ti-5Ag-35Sn (wt.%) alloys were designed and synthesized by threedimensionalprinting (3DP). The identification of an appropriate binder, densificationtechnique, and densification parameters for fabricating cranio-maxillo-facial prostheses wasundertaken using microscopic observations, x-ray diffraction tests, microhardness testing, linearshrinkage and wettability measurements. Moreover, electrochemical tests and surface analysiswere used to evaluate the corrosion resistance and passivation behavior of the materials ofinterest. Silver nitrate was found to be an appropriate inorganic reactive binder for atomizedtitanium powder. The optimal temperature for densification of as-printed parts using sinteringwas determined for Ti-Ag alloys. In addition, the type of infiltrant material and use ofhomogenization in liquid-Sn infiltration was explored for Ti-Ag-Sn alloys. While the Ti-Agalloy exhibited superior corrosion and mechanical behavior to the Ti-Ag-Sn alloy, the lattershowed better dimensional stability.

Sign in / Sign up

Export Citation Format

Share Document