Comparing the performance of multiple imaging systems with Fabry-Perot interferometers, concentric ring masks, and diffractive multifocal lenses

2007 ◽  
Author(s):  
Andrey G. Sedukhin
Keyword(s):  
Imaging Systems ◽  
Concentric Ring ◽  
Multiple Imaging ◽  
Fabry Perot

Digital imaging and quantitative image analysis of polymer blends

1996 ◽  
Vol 54 ◽  
pp. 170-171
Author(s):  
Xiao Zhang
Keyword(s):  
Digital Imaging ◽  
Imaging Techniques ◽  
Imaging Systems ◽  
Polymer Science ◽  
Key Factors ◽  
Multiple Imaging ◽  
Quantitative Image ◽  
Digital Imaging Systems ◽  
Multi Phase ◽  
Network Technologies

Polymer microscopy involves multiple imaging techniques. Speed, simplicity, and productivity are key factors in running an industrial polymer microscopy lab. In polymer science, the morphology of a multi-phase blend is often the link between process and properties. The extent to which the researcher can quantify the morphology determines the strength of the link. To aid the polymer microscopist in these tasks, digital imaging systems are becoming more prevalent. Advances in computers, digital imaging hardware and software, and network technologies have made it possible to implement digital imaging systems in industrial microscopy labs.

A Quantitative Approach to Speckle Reduction via Frequency Compounding

1986 ◽  
Vol 8 (3) ◽  
pp. 151-164 ◽  
Author(s):  
G.E. Trahey ◽  
J.W. Allison ◽  
S.W. Smith ◽  
O.T. von Ramm
Keyword(s):  
Speckle Pattern ◽  
Imaging Systems ◽  
Center Frequency ◽  
Speckle Reduction ◽  
Optimal Method ◽  
Pattern Change ◽  
Multiple Imaging ◽  
Speckle Patterns ◽  
Contrast Reduction ◽  
Ultrasonic Images

Coherent speckle is a source of image noise in ultrasonic B-mode imaging. The use of multiple imaging frequencies has been suggested as a technique for speckle contrast reduction. This technique involves the averaging of images whose speckle patterns have been modified by a change in the spectrum of the transmitted or received acoustical pulse. We have measured the rate of this speckle pattern change in ultrasonic images as a function of the change in center frequency of the transmitted acoustical pulse. This data is used to quantitatively describe the trade-off of resolution loss versus speckle reduction encountered when frequency compounding is employed and to derive the optimal method of frequency compounding. These results are then used as a basis for describing the overall advisability of frequency compounding in ultrasonic imaging systems. Our analysis indicates that simple frequency compounding is counterproductive in improving image quality.

scholarly journals Thoughts for Foods: Imaging Technology Opportunities for Monitoring and Measuring Food Quality

2021 ◽  
Author(s):  
Ayman Eissa ◽  
Lajos Helyes ◽  
Elio Romano ◽  
Ahmed Albandary ◽  
Ayman Ibrahim
Keyword(s):  
Food Quality ◽  
Advanced Technology ◽  
Imaging Systems ◽  
Electromagnetic Spectrum ◽  
Quality And Safety ◽  
Imaging Technology ◽  
Multiple Imaging ◽  
Technology Applications ◽  
Food Quality And Safety

In recent decades, the quality and safety of fruits, vegetables, cereals, meats, milk, and their derivatives from processed foods have become a serious issue for consumers in developed as well as developing countries. Undoubtedly, the traditional methods of inspecting and ensuring quality that depends on the human factor, some mechanical and chemical methods, have proven beyond any doubt their inability to achieve food quality and safety, and thus a failure to achieve food security. With growing attention on human health, the standards of food safety and quality are continuously being improved through advanced technology applications that depend on artificial intelligence tools to monitor the quality and safety of food. One of the most important of these applications is imaging technology. A brief discussion in this chapter on the utilize of multiple imaging systems based on all different bands of the electromagnetic spectrum as a principal source of various imaging systems. As well as methods of analyzing and reading images to build intelligence and non-destructive systems for monitoring and measuring the quality of foods.

scholarly journals Inter- and Intra-Scanner Variability of Automated Brain Volumetry on Three Magnetic Resonance Imaging Systems in Alzheimer’s Disease and Controls

2021 ◽  
Vol 13 ◽  
Author(s):  
Mandy Melissa Jane Wittens ◽  
Gert-Jan Allemeersch ◽  
Diana Maria Sima ◽  
Maarten Naeyaert ◽  
Tim Vanderhasselt ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging System ◽  
Brain Mri ◽  
Intraclass Correlation ◽  
Imaging Systems ◽  
Resonance Imaging ◽  
Brain Volumes ◽  
Brain Volumetry ◽  
Multiple Imaging

Magnetic Resonance Imaging (MRI) has become part of the clinical routine for diagnosing neurodegenerative disorders. Since acquisitions are performed at multiple centers using multiple imaging systems, detailed analysis of brain volumetry differences between MRI systems and scan-rescan acquisitions can provide valuable information to correct for different MRI scanner effects in multi-center longitudinal studies. To this end, five healthy controls and five patients belonging to various stages of the AD continuum underwent brain MRI acquisitions on three different MRI systems (Philips Achieva dStream 1.5T, Philips Ingenia 3T, and GE Discovery MR750w 3T) with harmonized scan parameters. Each participant underwent two subsequent MRI scans per imaging system, repeated on three different MRI systems within 2 h. Brain volumes computed by icobrain dm (v5.0) were analyzed using absolute and percentual volume differences, Dice similarity (DSC) and intraclass correlation coefficients, and coefficients of variation (CV). Harmonized scans obtained with different scanners of the same manufacturer had a measurement error closer to the intra-scanner performance. The gap between intra- and inter-scanner comparisons grew when comparing scans from different manufacturers. This was observed at image level (image contrast, similarity, and geometry) and translated into a higher variability of automated brain volumetry. Mixed effects modeling revealed a significant effect of scanner type on some brain volumes, and of the scanner combination on DSC. The study concluded a good intra- and inter-scanner reproducibility, as illustrated by an average intra-scanner (inter-scanner) CV below 2% (5%) and an excellent overlap of brain structure segmentation (mean DSC > 0.88).

scholarly journals To Predict the Lightfastness of Prints on Foil Applying Artificial Neural Network

2020 ◽  
Vol 2020 (1) ◽  
pp. 27-32
Author(s):  
Mahasweta Mandal ◽  
Swati Bandyopadhyay
Keyword(s):  
Management Practices ◽  
New Technologies ◽  
Imaging Techniques ◽  
Image Data ◽  
Imaging Systems ◽  
Multiple Sources ◽  
Advanced Imaging ◽  
X Ray ◽  
Multiple Imaging ◽  
Cultural Heritage Objects

Archives, libraries, and commercial firms are utilizing new advanced imaging methods for research into cultural heritage objects. New technical systems, including the latest multispectral (MSI) and x-ray fluorescence (XRF) imaging systems and higher resolution cameras raise major challenges for not only the integration of new technologies, but also the ability to store, manage and access large amounts of data in archives and libraries. Recent advanced imaging of ancient Syriac palimpsests (parchment manuscripts with hidden texts embedded within them) demonstrated an approach that utilized multiple imaging techniques and integration and analysis of data from multiple sources. Three palimpsest imaging projects (Archimedes Palimpsest, Syriac Galen Palimpsest, HMML Palimpsest) supported research with a range of advanced imaging techniques with MSI and XRF, requiring implementation and standardization of new digitization and data management practices for the integration, preservation and sharing of advanced image data.

scholarly journals Microdisplacement Measurement Based on F-P Etalon: Processing Method and Experiments

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3749
Author(s):  
Xiaoyan Shen ◽  
Shinan Zhou ◽  
Dongsheng Li
Keyword(s):  
Data Processing ◽  
Processing Method ◽  
Displacement Measurement ◽  
Concentric Ring ◽  
Data Processing Method ◽  
Circle Centre ◽  
Fabry Perot ◽  
Coordinate Rotation ◽  
Circular Regression ◽  
Extended Uncertainty

Herein, a processing method is proposed for accurate microdisplacement measurements from a 2D Fabry–Perot (F-P) fringe pattern. The core of the processing algorithm uses the F-P interference imaging concentric ring pattern to accurately calculate the centre coordinates of the concentric ring. The influencing factors of measurement were analysed, and the basic idea of data processing was provided. In particular, the coordinate rotation by the 45-degree method (CR) was improved; consequently, the virtual pixel interval was reduced by half, and the calculation accuracy of the circle centre coordinate was improved. Experiments were conducted to analyse the influence of the subdivision and circle fitting methods. The results show that the proposed secondary coordinate rotation (SCR) by 45 degrees method can obtain higher accuracy of the centre coordinate than the CR method, and that the multichord averaging method (MCAM) is more suitable for calculation of the centre coordinate than the circular regression method (CRM). Displacement measurement experiments were performed. The results show that the standard experimental deviation of the centre of the circle is approximately 0.009 µm, and the extended uncertainty of the displacement measurement in the range of 5 mm is approximately 0.03 μm. The data processing method studied in this study can be widely used in the field of F-P interferometry.

scholarly journals Quantitative Ultrasound Comparison of MAT and 4T1 Mammary Tumors in Mice and Rats Across Multiple Imaging Systems

2015 ◽  
Vol 34 (8) ◽  
pp. 1373-1383 ◽  
Author(s):  
Lauren A. Wirtzfeld ◽  
Goutam Ghoshal ◽  
Ivan M. Rosado-Mendez ◽  
Kibo Nam ◽  
Yeonjoo Park ◽  
...  
Keyword(s):  
Quantitative Ultrasound ◽  
Mammary Tumors ◽  
Imaging Systems ◽  
Multiple Imaging

State-of-the-art pulmonary arterial imaging – Part 2

VASA ◽  
2018 ◽  
Vol 47 (5) ◽  
pp. 361-375 ◽  
Author(s):  
Harold Goerne ◽  
Abhishek Chaturvedi ◽  
Sasan Partovi ◽  
Prabhakar Rajiah
Keyword(s):  
Pulmonary Artery ◽  
State Of The Art ◽  
Therapy Monitoring ◽  
Pulmonary Arteries ◽  
Imaging Modalities ◽  
Cross Sectional ◽  
Multiple Imaging ◽  
Cross Sectional Imaging ◽  
Pulmonary Arterial ◽  
Arterial Imaging

Abstract. Although pulmonary embolism is the most common abnormality of the pulmonary artery, there is a broad spectrum of other congenital and acquired pulmonary arterial abnormalities. Multiple imaging modalities are now available to evaluate these abnormalities of the pulmonary arteries. CT and MRI are the most commonly used cross-sectional imaging modalities that provide comprehensive information on several aspects of these abnormalities, including morphology, function, risk-stratification and therapy-monitoring. In this article, we review the role of state-of-the-art pulmonary arterial imaging in the evaluation of non-thromboembolic disorders of pulmonary artery.

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