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Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing

This research investigates the use of charge coupled device (abbreviated as CCD) linear image sensors in an optical tomographic instrumentation system used for sizing particles. The measurement system, consisting of four CCD linear image sensors are configured around an octagonal shaped flow pipe fo...

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Detalles Bibliográficos
Autores principales: Idroas, Mariani, Rahim, Ruzairi Abdul, Green, Robert Garnet, Ibrahim, Muhammad Nasir, Rahiman, Mohd Hafiz Fazalul
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3230960/
https://www.ncbi.nlm.nih.gov/pubmed/22163423
http://dx.doi.org/10.3390/s101009512
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author Idroas, Mariani
Rahim, Ruzairi Abdul
Green, Robert Garnet
Ibrahim, Muhammad Nasir
Rahiman, Mohd Hafiz Fazalul
author_facet Idroas, Mariani
Rahim, Ruzairi Abdul
Green, Robert Garnet
Ibrahim, Muhammad Nasir
Rahiman, Mohd Hafiz Fazalul
author_sort Idroas, Mariani
collection PubMed
description This research investigates the use of charge coupled device (abbreviated as CCD) linear image sensors in an optical tomographic instrumentation system used for sizing particles. The measurement system, consisting of four CCD linear image sensors are configured around an octagonal shaped flow pipe for a four projections system is explained. The four linear image sensors provide 2,048 pixel imaging with a pixel size of 14 micron × 14 micron, hence constituting a high-resolution system. Image reconstruction for a four-projection optical tomography system is also discussed, where a simple optical model is used to relate attenuation due to variations in optical density, [R], within the measurement section. Expressed in matrix form this represents the forward problem in tomography [S] [R] = [M]. In practice, measurements [M] are used to estimate the optical density distribution by solving the inverse problem [R] = [S](−1)[M]. Direct inversion of the sensitivity matrix, [S], is not possible and two approximations are considered and compared—the transpose and the pseudo inverse sensitivity matrices.
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spelling pubmed-32309602011-12-07 Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing Idroas, Mariani Rahim, Ruzairi Abdul Green, Robert Garnet Ibrahim, Muhammad Nasir Rahiman, Mohd Hafiz Fazalul Sensors (Basel) Article This research investigates the use of charge coupled device (abbreviated as CCD) linear image sensors in an optical tomographic instrumentation system used for sizing particles. The measurement system, consisting of four CCD linear image sensors are configured around an octagonal shaped flow pipe for a four projections system is explained. The four linear image sensors provide 2,048 pixel imaging with a pixel size of 14 micron × 14 micron, hence constituting a high-resolution system. Image reconstruction for a four-projection optical tomography system is also discussed, where a simple optical model is used to relate attenuation due to variations in optical density, [R], within the measurement section. Expressed in matrix form this represents the forward problem in tomography [S] [R] = [M]. In practice, measurements [M] are used to estimate the optical density distribution by solving the inverse problem [R] = [S](−1)[M]. Direct inversion of the sensitivity matrix, [S], is not possible and two approximations are considered and compared—the transpose and the pseudo inverse sensitivity matrices. Molecular Diversity Preservation International (MDPI) 2010-10-22 /pmc/articles/PMC3230960/ /pubmed/22163423 http://dx.doi.org/10.3390/s101009512 Text en © 2010 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Idroas, Mariani
Rahim, Ruzairi Abdul
Green, Robert Garnet
Ibrahim, Muhammad Nasir
Rahiman, Mohd Hafiz Fazalul
Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing
title Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing
title_full Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing
title_fullStr Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing
title_full_unstemmed Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing
title_short Image Reconstruction of a Charge Coupled Device Based Optical Tomographic Instrumentation System for Particle Sizing
title_sort image reconstruction of a charge coupled device based optical tomographic instrumentation system for particle sizing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3230960/
https://www.ncbi.nlm.nih.gov/pubmed/22163423
http://dx.doi.org/10.3390/s101009512
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