scholarly journals Combined Neutron and X-ray Imaging for Non-invasive Investigations of Cultural Heritage Objects

2015 ◽  
Vol 69 ◽  
pp. 653-660 ◽  
Author(s):  
D. Mannes ◽  
F. Schmid ◽  
J. Frey ◽  
K. Schmidt-Ott ◽  
E. Lehmann
2021 ◽  
Author(s):  
Ali Mohammad Alqudah ◽  
Shoroq Qazan ◽  
Ihssan S. Masad

Abstract BackgroundChest diseases are serious health problems that threaten the lives of people. The early and accurate diagnosis of such diseases is very crucial in the success of their treatment and cure. Pneumonia is one of the most widely occurred chest diseases responsible for a high percentage of deaths especially among children. So, detection and classification of pneumonia using the non-invasive chest x-ray imaging would have a great advantage of reducing the mortality rates.ResultsThe results showed that the best input image size in this framework was 64 64 based on comparison between different sizes. Using CNN as a deep features extractor and utilizing the 10-fold methodology the propose artificial intelligence framework achieved an accuracy of 94% for SVM and 93.9% for KNN, a sensitivity of 93.33% for SVM and 93.19% for KNN and a specificity of 96.68% for SVM and 96.60% for KNN.ConclusionsIn this study, an artificial intelligence framework has been proposed for the detection and classification of pneumonia based on chest x-ray imaging with different sizes of input images. The proposed methodology used CNN for features extraction that were fed to two different types of classifiers, namely, SVM and KNN; in addition to the SoftMax classifier which is the default CNN classifier. The proposed CNN has been trained, validated, and tested using a large dataset of chest x-ray images contains in total 5852 images.


2015 ◽  
Vol 27 (3) ◽  
pp. 269-278 ◽  
Author(s):  
Veerle Cnudde ◽  
Tim De Kock ◽  
Marijn Boone ◽  
Wesley De Boever ◽  
Tom Bultreys ◽  
...  

2014 ◽  
Vol 21 (4) ◽  
pp. 768-773 ◽  
Author(s):  
Martin Donnelley ◽  
Kaye S. Morgan ◽  
Karen K. W. Siu ◽  
Andreas Fouras ◽  
Nigel R. Farrow ◽  
...  

To assess potential therapies for respiratory diseases in which mucociliary transit (MCT) is impaired, such as cystic fibrosis and primary ciliary dyskinesia, a novel and non-invasive MCT quantification method has been developed in which the transit rate and behaviour of individual micrometre-sized deposited particles are measured in live mice using synchrotron phase-contrast X-ray imaging. Particle clearance by MCT is known to be a two-phase process that occurs over a period of minutes to days. Previous studies have assessed MCT in the fast-clearance phase, ∼20 min after marker particle dosing. The aim of this study was to non-invasively image changes in particle presence and MCT during the slow-clearance phase, and simultaneously determine whether repeat synchrotron X-ray imaging of mice was feasible over periods of 3, 9 and 25 h. All mice tolerated the repeat imaging procedure with no adverse effects. Quantitative image analysis revealed that the particle MCT rate and the number of particles present in the airway both decreased with time. This study successfully demonstrated for the first time that longitudinal synchrotron X-ray imaging studies are possible in live small animals, provided appropriate animal handling techniques are used and care is taken to reduce the delivered radiation dose.


2020 ◽  
Author(s):  
Ali Mohammad Alqudah ◽  
Shoroq Qazan ◽  
Ihssan S. Masad

Abstract BackgroundChest diseases are serious health problems that threaten the lives of people. The early and accurate diagnosis of such diseases is very crucial in the success of their treatment and cure. Pneumonia is one of the most widely occurred chest diseases responsible for a high percentage of deaths especially among children. So, detection and classification of pneumonia using the non-invasive chest x-ray imaging would have a great advantage of reducing the mortality rates.ResultsThe results showed that the best input image size in this framework was 64 64 based on comparison between different sizes. Using CNN as a deep features extractor and utilizing the 10-fold methodology the propose artificial intelligence framework achieved an accuracy of 94% for SVM and 93.9% for KNN, a sensitivity of 93.33% for SVM and 93.19% for KNN and a specificity of 96.68% for SVM and 96.60% for KNN.ConclusionsIn this study, an artificial intelligence framework has been proposed for the detection and classification of pneumonia based on chest x-ray imaging with different sizes of input images. The proposed methodology used CNN for features extraction that were fed to two different types of classifiers, namely, SVM and KNN; in addition to the SoftMax classifier which is the default CNN classifier. The proposed CNN has been trained, validated, and tested using a large dataset of chest x-ray images contains in total 5852 images.


2017 ◽  
Author(s):  
Farzana Zaki ◽  
Isabella Hou ◽  
Qiongdan Huang ◽  
Denver Cooper ◽  
Divya Patel ◽  
...  

2018 ◽  
Vol 139 ◽  
pp. 450-457 ◽  
Author(s):  
Elettra Barberis ◽  
Simone Baiocco ◽  
Eleonora Conte ◽  
Fabio Gosetti ◽  
Antonio Rava ◽  
...  

Proceedings ◽  
2019 ◽  
Vol 29 (1) ◽  
pp. 36
Author(s):  
Irina Fierascu ◽  
Roxana Ioana Brazdis ◽  
Alexandru Stirban ◽  
Ariana Codruța Leahu ◽  
Lia Mara Ditu ◽  
...  

Cultural heritage objects suffer from different reasons. [...]


2021 ◽  
Vol 7 (11) ◽  
pp. 224
Author(s):  
Ekaterina Kovalenko ◽  
Mikhail Murashev ◽  
Konstantin Podurets ◽  
Elena Tereschenko ◽  
Ekaterina Yatsishina

This paper analyzes the results of studies carried out at the National Research Center “Kurchatov Institute”, Moscow, using the methods of neutron and X-ray synchrotron tomography from the point of view of the preservation state of metal objects. Objects damaged by corrosion and exposure to fire were the focus of this study. To identify regions of metal preservation, the diffraction contrast on grains of metal, observed in tomographic projections, was used. The simultaneous use of neutron and synchrotron imaging is shown to be a powerful tool for identification of the constituents of an object.


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