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

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

A Practical Computed Tomography Image Ring Artifact Correction Method for Large-Scale Dead Pixels of X-ray Detector

2018 ◽  
Vol 8 (5) ◽  
pp. 950-958
Author(s):  
Cuiyun Yuan ◽  
Zijia Chen ◽  
Hongliang Qi ◽  
Shuyu Wu ◽  
Bin Li ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Large Scale ◽  
Correction Method ◽  
Artifact Correction ◽  
X Ray ◽  
Ring Artifact ◽  
Tomography Image ◽  
Computed Tomography Image

Ring artifact correction for X-ray computed tomography

2014 ◽  
Vol 26 (12) ◽  
pp. 124001
Author(s):  
马继明 Ma Jiming ◽  
宋岩 Song Yan ◽  
王群书 Wang Qunshu ◽  
宋顾周 Song Guzhou ◽  
张建奇 Zhang Jianqi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Artifact Correction ◽  
X Ray ◽  
Ring Artifact ◽  
X Ray Computed

A deep learning-based ring artifact correction method for X-ray CT

2021 ◽  
Author(s):  
Lulu Yuan ◽  
Qiong Xu ◽  
Baodong Liu ◽  
Zhe Wang ◽  
Shuangquan Liu ◽  
...  
Keyword(s):  
Deep Learning ◽  
Correction Method ◽  
Artifact Correction ◽  
X Ray ◽  
Ring Artifact

Application of X-ray CT to liquid security inspection: System analysis and beam hardening correction

2007 ◽  
Vol 579 (1) ◽  
pp. 395-399 ◽  
Author(s):  
Hewei Gao ◽  
Li Zhang ◽  
Zhiqiang Chen ◽  
Yuxiang Xing ◽  
Jianping Cheng ◽  
...  
Keyword(s):  
System Analysis ◽  
Inspection System ◽  
Beam Hardening ◽  
X Ray ◽  
Beam Hardening Correction ◽  
Security Inspection

scholarly journals Monitoring moisture movements in building materials using X-ray attenuation: Influence of beam-hardening of polychromatic X-ray photon beams

2012 ◽  
Vol 36 ◽  
pp. 419-429 ◽  
Author(s):  
Brad J. Pease ◽  
Gregor A. Scheffler ◽  
Hans Janssen
Keyword(s):  
Building Materials ◽  
Photon Beams ◽  
Beam Hardening ◽  
X Ray

scholarly journals An anthropomorphic phantom representing a prematurely born neonate for digital x-ray imaging using 3D printing: Proof of concept and comparison of image quality from different systems

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Nikolaus Irnstorfer ◽  
Ewald Unger ◽  
Azadeh Hojreh ◽  
Peter Homolka
Keyword(s):  
Image Quality ◽  
Diagnostic Image Quality ◽  
Anthropomorphic Phantom ◽  
Beam Hardening ◽  
Standard Case ◽  
X Ray ◽  
Printing Quality ◽  
Imaging Results ◽  
Image Appearance ◽  
Neonatal Imaging

Abstract An anthropomorphic phantom for image optimization in neonatal radiography was developed, and its usability in optimizing image acquisition and processing demonstrated. The phantom was designed to mimic a patient image of a prematurely born neonate. A clinical x-ray (neonate <1 kg) taken with an effective dose of 11 µSv on a needle-crystal storage phosphor system was retrospectively selected from anonymized images as an appropriate template representing a standard case in neonatology imaging. The low dose level used in clinical imaging results in high image noise content. Therefore, the image had to be processed using structure preserving noise reduction. Pixel values were related to printing material thickness to result in a similar attenuation pattern as the original patient including support mattress. A 3D model generating a similar x-ray attenuation pattern on an image detector as a patient was derived accounting for beam hardening and perspective, and printed using different printing technologies. Best printing quality was achieved using a laser stereolithography printer. Phantom images from different digital radiography systems used in neonatal imaging were compared. Effects of technology, image processing, and radiation dose on diagnostic image quality can be assessed for otherwise identical anthropomorphic neonatal images not possible with patient images, facilitating optimization and standardization of imaging parameters and image appearance.

Triple-sensitivity high-spatial-resolution X-ray computed tomography using a cadmium-telluride detector and its beam-hardening effect

2020 ◽  
Vol 159 ◽  
pp. 109089 ◽  
Author(s):  
Sohei Yoshida ◽  
Eiichi Sato ◽  
Yasuyuki Oda ◽  
Kunihiro Yoshioka ◽  
Hodaka Moriyama ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cadmium Telluride ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Beam Hardening ◽  
X Ray ◽  
Hardening Effect ◽  
X Ray Computed

scholarly journals The use of sodium polytungstate as an X-ray contrast agent to reduce the beam hardening artifact in hydrological laboratory experiments

2013 ◽  
Vol 61 (4) ◽  
pp. 347-352 ◽  
Author(s):  
Yoshito Nakashima
Keyword(s):  
Contrast Agent ◽  
Laboratory Experiments ◽  
Source Spectrum ◽  
Ct Scanner ◽  
Beam Hardening ◽  
Two Phase ◽  
X Ray ◽  
X Ray Computed ◽  
Element Bearing ◽  
Sodium Polytungstate

Abstract Iodine is conventionally used as a contrast agent in hydrological laboratory experiments using polychromatic X-ray computed tomography (CT) to monitor two-phase Darcy flow in porous geological media. Undesirable beam hardening artifacts, however, render the quantitative analysis of the obtained CT images difficult. CT imaging of porous sand/bead packs saturated with iodine and tungsten-bearing aqueous solutions, respectively, was performed using a medical CT scanner. We found that sodium polytungstate (Na6H2W12O40) significantly reduced the beam hardening compared with potassium iodide (KI). This result is attributable to the location of the K absorption edge of tungsten, which is nearer to the peak of the polychromatic X-ray source spectrum than that of iodine. As sodium polytungstate is chemically stable and less toxic than other heavy element bearing compounds, we recommend it as a promising contrast agent for hydrological CT experiments.

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