Non-Destructive Assaying Gold Jewellery Using Dual-Energy Micro-Computed Tomography

2015 ◽  
Vol 73 (3) ◽  
Author(s):  
Jaafar Abdullah ◽  
Abibullah Samsudin ◽  
Nor Laili Omar ◽  
Hafizza Abdul Manan
Keyword(s):  
Computed Tomography ◽  
Matrix Effects ◽  
Visual Observation ◽  
Dual Energy ◽  
Micro Computed Tomography ◽  
Tomographic Images ◽  
X Ray ◽  
Challenging Tasks ◽  
Tomography Method ◽  
Non Destructive

Determining the fineness of gold jewelleries remains one of the most challenging tasks in gold trading. The existing technology of gold testing is inadequate, allowing gold counterfeiting worldwide. The most popular non-destructive method for analysis of gold jewelleries is X-ray fluorescence technique. However, the technique is limited to surface only and it is also greatly influenced by matrix effects. In this paper, dual-energy X-ray micro-computed tomography method was proposed to assay gold jewelleries. Experimental results demonstrated that grey values of reconstructed tomographic images in combination with advanced image analysis procedures could be used to detect fake jewelleries. Due to the uniqueness of X-ray absorption, the technique was also capable of identifying different materials in gold jewelleries. Further analysis on sectioned-earrings samples using X-ray diffraction techniques and visual observation confirmed all tomographic findings.  

Architectural Terracruda Sculptures of the Silk Roads: New Conservation Insights Through a Diagnostic Approach Based on Non-Destructive X-ray Micro-Computed Tomography

2021 ◽  
pp. 1-13
Author(s):  
Mònica López-Prat ◽  
Raffaele Giuseppe Agostino ◽  
Sudipa Ray Bandyopadhyay ◽  
Begoña Carrascosa ◽  
Maria Caterina Crocco ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Diagnostic Approach ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Non Destructive

scholarly journals X-ray Micro-Computed Tomography: An Emerging Technology to Analyze Vascular Calcification in Animal Models

2020 ◽  
Vol 21 (12) ◽  
pp. 4538
Author(s):  
Samantha J. Borland ◽  
Julia Behnsen ◽  
Nick Ashton ◽  
Sheila E. Francis ◽  
Keith Brennan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Animal Models ◽  
Vascular Calcification ◽  
Micro Computed Tomography ◽  
Mineralized Tissue ◽  
X Ray ◽  
Cardiovascular Morbidity And Mortality ◽  
Non Destructive ◽  
Preparation Techniques

Vascular calcification describes the formation of mineralized tissue within the blood vessel wall, and it is highly associated with increased cardiovascular morbidity and mortality in patients with chronic kidney disease, diabetes, and atherosclerosis. In this article, we briefly review different rodent models used to study vascular calcification in vivo, and critically assess the strengths and weaknesses of the current techniques used to analyze and quantify calcification in these models, namely 2-D histology and the o-cresolphthalein assay. In light of this, we examine X-ray micro-computed tomography (µCT) as an emerging complementary tool for the analysis of vascular calcification in animal models. We demonstrate that this non-destructive technique allows us to simultaneously quantify and localize calcification in an intact vessel in 3-D, and we consider recent advances in µCT sample preparation techniques. This review also discusses the potential to combine 3-D µCT analyses with subsequent 2-D histological, immunohistochemical, and proteomic approaches in correlative microscopy workflows to obtain rich, multifaceted information on calcification volume, calcification load, and signaling mechanisms from within the same arterial segment. In conclusion we briefly discuss the potential use of µCT to visualize and measure vascular calcification in vivo in real-time.

scholarly journals Non-destructive determination of floral staging in cereals using X-ray micro computed tomography (µCT)

Plant Methods ◽  
2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Saoirse R. Tracy ◽  
José Fernández Gómez ◽  
Craig J. Sturrock ◽  
Zoe A. Wilson ◽  
Alison C. Ferguson
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Non Destructive

scholarly journals Perspectives of the Tooth Restoration Technology Based on the Computed Tomography Data

2018 ◽  
Vol 155 ◽  
pp. 01004
Author(s):  
Maxim Putrik ◽  
Vladimir Ivanov ◽  
Igor Antsygin
Keyword(s):  
Computed Tomography ◽  
Processing System ◽  
Cone Beam ◽  
Tooth Surface ◽  
X Rays ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Tomography Method ◽  
Cone Beam Tomography ◽  
Tomography Data

The aim of the study is to create an image processing system, which allows dentists to create tooth surface automatically. X-rays images of jaws from the cone beam tomography or the spiral computed tomography and images from the micro-computed tomography are the initial data for processing. Example of using the combination of optical and x-ray images in the dentistry is described. Also, it was shown how to use the microcomputed tomography method to plan the placement of orthopedic structures on the lost teeth sites.

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