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- Q488986 subject Q16811639.
- Q488986 subject Q20983678.
- Q488986 subject Q8488116.
- Q488986 subject Q8552216.
- Q488986 abstract "Electrical resistivity tomography (ERT) or electrical resistivity imaging (ERI) is a geophysical technique for imaging sub-surface structures from electrical resistivity measurements made at the surface, or by electrodes in one or more boreholes. If the electrodes are suspended in the boreholes, deeper sections can be investigated. It is closely related to the medical imaging technique electrical impedance tomography (EIT), and mathematically is the same inverse problem. In contrast to medical EIT however ERT is essentially a direct current method. A related geophysical method, induced polarization, measures the transient response. The technique evolved from techniques of electrical prospecting that predate digital computers, where layers or anomalies were sought rather than images.Early work on the mathematical problem in the 1930s assumed a layered medium (see for example Langer, Slichter). Tikhonov who is best known for his work on regularization of inverse problems also worked on this problem. He explains in detail how to solve the ERT problem in a simple case of 2-layered medium. During the 1940s he collaborated with geophyicists and without the aid of computers they discovered large deposits of copper. As a result, they were awarded a State Prize of Soviet Union.When adequate computers became widely available the inverse problem of ERT could be solved numerically, and the work of Loke and Barker at Birmingham University was among the first such solution, and their approach is still widely used.With the advancement in the field of Electrical Resistivity Tomography (ERT) from 1D to 2D and now-a- days 3D, ERT has explored many fields. The applications of ERT include fault investigation, ground water table investigation, soil moisture content determination and many others. In industrial process imaging ERT can be used in a similar fashion to medical EIT, to image the distribution of conductivity in mixing vessels and pipes. In this context it is usually called Electrical Resistance Tomography, emphasising the quantity that is measured rather than imaged.".
- Q488986 thumbnail 2D_inversion_of_electrical_resistivity_data.png?width=300.
- Q488986 wikiPageExternalLink loke_course_notes.pdf.
- Q488986 wikiPageExternalLink Calderon.
- Q488986 wikiPageWikiLink Q1326472.
- Q488986 wikiPageWikiLink Q1413106.
- Q488986 wikiPageWikiLink Q14479002.
- Q488986 wikiPageWikiLink Q1567213.
- Q488986 wikiPageWikiLink Q16811639.
- Q488986 wikiPageWikiLink Q176140.
- Q488986 wikiPageWikiLink Q2007184.
- Q488986 wikiPageWikiLink Q20983678.
- Q488986 wikiPageWikiLink Q223429.
- Q488986 wikiPageWikiLink Q254096.
- Q488986 wikiPageWikiLink Q372026.
- Q488986 wikiPageWikiLink Q4200946.
- Q488986 wikiPageWikiLink Q46255.
- Q488986 wikiPageWikiLink Q502102.
- Q488986 wikiPageWikiLink Q5535575.
- Q488986 wikiPageWikiLink Q7377177.
- Q488986 wikiPageWikiLink Q7446980.
- Q488986 wikiPageWikiLink Q8488116.
- Q488986 wikiPageWikiLink Q8552216.
- Q488986 comment "Electrical resistivity tomography (ERT) or electrical resistivity imaging (ERI) is a geophysical technique for imaging sub-surface structures from electrical resistivity measurements made at the surface, or by electrodes in one or more boreholes. If the electrodes are suspended in the boreholes, deeper sections can be investigated. It is closely related to the medical imaging technique electrical impedance tomography (EIT), and mathematically is the same inverse problem.".
- Q488986 label "Electrical resistivity tomography".
- Q488986 depiction 2D_inversion_of_electrical_resistivity_data.png.