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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2005
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=56844305 |
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| _version_ | 1866815559956430848 |
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| author | R. Martin |
| author_facet | R. Martin |
| contents | Electrical capacitance tomography two-phase oil-gas pipe flow imaging by the linear back-projection algorithm R. Martin C. Ortiz-Alemán J. C. Gamio Ciencias de la Tierra projection linear back flow imaging inverse modelling image reconstruction Electrical Capacitance Tomography (ECT) is a novel technology that can deal with the complexity of two-phase gas-oilflow measurement by explicitly deriving the component distributions on two adjacent planes along a pipeline. One of its mostpromising applications is the visualization of gas-oil flows. ECT offers some advantages over other tomography modalities, suchas no radiation, rapid response, low-cost, being non-intrusive and non-invasive, and the ability to withstand high temperature andhigh pressure. The linear back-projection (LBP) algorithm is one of the most popular methods employed to perform image reconstructionin ECT. Despite its relatively poor accuracy, it is a simple and fast procedure capable of real-time operation in manyapplications, and it has remained a very popular choice. However, since it was first reported it has lacked a clear formal support inthe context of this application. Its only justification has been that it was an adaptation of a method normally used in linear X-raymedical tomography, and the fact that it actually does produce useful (albeit only `qualitative`) images. In this paper, one illustrativeway of interpreting LBP is presented. It is shown how LBP is actually based on the linearisation of a normalised form of theforward problem. More specifically, the normalised forward problem is approximated by means of a series of hyper-planes. Thereconstruction matrix used in LBP is found to be a `weighted` transpose of the linear operator (matrix) that defines the linearisednormalised forward problem. The rows of this latter matrix contain the information of the sensitivity maps used in LBP. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844305 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.44 |
| format | Artículo científico |
| id | redalyc_56844305 |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Electrical capacitance tomography two-phase oil-gas pipe flow imaging by the linear back-projection algorithm R. Martin Ciencias de la Tierra projection linear back flow imaging inverse modelling image reconstruction Electrical capacitance tomography two-phase oil-gas pipe flow imaging by the linear back-projection algorithm R. Martin C. Ortiz-Alemán J. C. Gamio Ciencias de la Tierra projection linear back flow imaging inverse modelling image reconstruction Electrical Capacitance Tomography (ECT) is a novel technology that can deal with the complexity of two-phase gas-oilflow measurement by explicitly deriving the component distributions on two adjacent planes along a pipeline. One of its mostpromising applications is the visualization of gas-oil flows. ECT offers some advantages over other tomography modalities, suchas no radiation, rapid response, low-cost, being non-intrusive and non-invasive, and the ability to withstand high temperature andhigh pressure. The linear back-projection (LBP) algorithm is one of the most popular methods employed to perform image reconstructionin ECT. Despite its relatively poor accuracy, it is a simple and fast procedure capable of real-time operation in manyapplications, and it has remained a very popular choice. However, since it was first reported it has lacked a clear formal support inthe context of this application. Its only justification has been that it was an adaptation of a method normally used in linear X-raymedical tomography, and the fact that it actually does produce useful (albeit only `qualitative`) images. In this paper, one illustrativeway of interpreting LBP is presented. It is shown how LBP is actually based on the linearisation of a normalised form of theforward problem. More specifically, the normalised forward problem is approximated by means of a series of hyper-planes. Thereconstruction matrix used in LBP is found to be a `weighted` transpose of the linear operator (matrix) that defines the linearisednormalised forward problem. The rows of this latter matrix contain the information of the sensitivity maps used in LBP. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844305 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.44 |
| title | Electrical capacitance tomography two-phase oil-gas pipe flow imaging by the linear back-projection algorithm |
| topic | Ciencias de la Tierra projection linear back flow imaging inverse modelling image reconstruction |
| url | https://www.redalyc.org/articulo.oa?id=56844305 |