Metal artifact correction based on combination of 2D and 3D region growing for x-ray tomosynthesis

AbstractIt is well known that the scattering of ultrashort pulses (USPs) of an electromagnetic field in the X-ray frequency range can be used in diffraction analysis. When such USPs are scattered by various polyatomic objects, a diffraction pattern appears from which the structure of the object can be determined. Today, there is a technical possibility of creating powerful USP sources and the analysis of the scattering spectra of such pulses is a high-precision instrument for studying the structure of matter. As a rule, such scattering occurs at a frequency close to the carrier frequency of the incident USP. In this work, it is shown that for high-power USPs, where the magnetic component of USPs cannot be neglected, scattering at the second harmonic appears. The scattering of USPs by the second harmonic has a characteristic diffraction pattern which can be used to judge the structure of the scattering object; combining the scattering spectra at the first and second harmonics therefore greatly enhances the diffraction analysis of matter. Scattering spectra at the first and second harmonics are shown for various polyatomic objects: examples considered are 2D and 3D materials such as graphene, carbon nanotubes, and hybrid structures consisting of nanotubes. The theory developed in this work can be applied to various multivolume objects and is quite simple for X-ray structural analysis, because it is based on analytical expressions.

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Empirical Beam Hardening and Ring Artifact Correction for X‐Ray Grating Interferometry (EBHC‐GI)

Medical Physics ◽

10.1002/mp.14672 ◽

2020 ◽

Author(s):

Brandon J. Nelson ◽

Shuai Leng ◽

Elisabeth R. Shanblatt ◽

Cynthia H. McCollough ◽

Thomas Koenig

Keyword(s):

Beam Hardening ◽

Artifact Correction ◽

X Ray ◽

Ring Artifact

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Fractal analysis of 2D and 3D mesocracks in recycled aggregate concrete using X-ray computed tomography images

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.127083 ◽

2021 ◽

pp. 127083

Author(s):

Xiaoyu Shang ◽

Jingwei Yang ◽

Simiao Wang ◽

Mingzhong Zhang

Keyword(s):

Computed Tomography ◽

Fractal Analysis ◽

Recycled Aggregate Concrete ◽

Recycled Aggregate ◽

Aggregate Concrete ◽

X Ray ◽

Computed Tomography Images ◽

X Ray Computed ◽

2D And 3D

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Comparative methods for metal artifact reduction in x-ray CT

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) ◽

10.1109/nssmic.2014.7430961 ◽

2014 ◽

Author(s):

Mehrsima Abdoli ◽

Abolfazl Mehranian ◽

Angeliki Ailianou ◽

Minerva Becker ◽

Habib Zaidi

Keyword(s):

Comparative Methods ◽

Artifact Reduction ◽

Metal Artifact ◽

Metal Artifact Reduction ◽

X Ray

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Doppler Tomography in 2D and 3D of the X-ray Binary Cyg X-1 for June 2007

Proceedings of the International Astronomical Union ◽

10.1017/s1743921311027359 ◽

2011 ◽

Vol 7 (S282) ◽

pp. 201-202 ◽

Cited By ~ 1

Author(s):

O. I. Sharova ◽

M. I. Agafonov ◽

E. A. Karitskaya ◽

N. G. Bochkarev ◽

S. V. Zharikov ◽

...

Keyword(s):

Binary System ◽

Spectral Data ◽

Inclination Angle ◽

Tomographic Reconstruction ◽

Orbital Plane ◽

National Observatory ◽

Doppler Tomography ◽

X Ray ◽

2D And 3D ◽

First Time

AbstractThe 2D and 3D Doppler tomograms of X-ray binary system Cyg X-1 (V1357 Cyg) were reconstructed from spectral data for the line HeII 4686Å obtained with 2-m telescope of the Peak Terskol Observatory (Russia) and 2.1-m telescope of the Mexican National Observatory in June, 2007. Information about gas motions outside the orbital plane, using all of the three velocity components Vx, Vy, Vz, was obtained for the first time. The tomographic reconstruction was carried out for the system inclination angle of 45°. The equal resolution (50 × 50 × 50 km/s) is realized in this case, in the orbital plane (Vx, Vy) and also in the perpendicular direction Vz. The checkout tomograms were realized also for the inclination angle of 40° because of the angle uncertainty. Two versions of the result showed no qualitative discrepancy. Details of the structures revealed by the 3D Doppler tomogram were analyzed.

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View-Angle Tilting and Slice-Encoding Metal Artifact Correction for Artifact Reduction in MRI: Experimental Sequence Optimization for Orthopaedic Tumor Endoprostheses and Clinical Application

PLoS ONE ◽

10.1371/journal.pone.0124922 ◽

2015 ◽

Vol 10 (4) ◽

pp. e0124922 ◽

Cited By ~ 13

Author(s):

Pia M. Jungmann ◽

Carl Ganter ◽

Christoph J. Schaeffeler ◽

Jan S. Bauer ◽

Thomas Baum ◽

...

Keyword(s):

Clinical Application ◽

Artifact Reduction ◽

Metal Artifact ◽

Sequence Optimization ◽

Artifact Correction ◽

Experimental Sequence ◽

View Angle Tilting

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Generation of a 3D model of the inside volume of shoes for e-commerce applications using industrial X-ray computed tomography

Engineering Research Express ◽

10.1088/2631-8695/ac43c8 ◽

2021 ◽

Author(s):

J Wittmann ◽

G Herl ◽

J Hiller

Keyword(s):

Computed Tomography ◽

3D Model ◽

Region Growing ◽

Surface Model ◽

Economic Potential ◽

X Ray ◽

Internet Users ◽

Surface Data ◽

X Ray Computed ◽

The Individual

Abstract In 2018, 47 % of global internet users had purchased footwear products through the internet, making it the second most popular online shopping category worldwide right after clothing with 57 %. In the same year, on average, about every sixth parcel delivered in Germany (16.3 %) was returned. With the effort and costs that are associated with the return of shoes, the objective of reducing the number of returns for shoes promises an enormous economic potential and helps to reduce the CO2 emissions due to a lower trafic volume. This paper presents a workflow for determining the inside volume surface of shoes using industrial X-ray computed tomography (CT). The fundamental idea is based on the Region Growing (RG) method for the segmentation of the shoe's inner volume. Experiments are performed to illustrate the correlation of image quality and segmentation result. After obtaining the 3D surface model of an individual foot, the inner volume surface data of a scanned shoe can then be registered and evaluated in order to provide a reliable feedback for the customer regarding the accuracy of fit of a shoe and the individual foot on the basis of an overall "metric of comfort" before buying online. This step is not part of the work at hand. Conclusions are drawn and suggestions for improving the robustness and the exibility of the workflow are given, so it can be adapted to various shoe types and implemented in a fully automated measurement process in the future.

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