Porous materials are of great interest, both theoretically and experimentally, in various scientific and technical areas (micelles, sponges, rocks, construction materials, wood, biological materials, etc.). For this reason it is important to have at hand experimental techniques for a proper characterization of their physical properties. The most relevant characteristic parameters of porous materials are: porosity, distribution of pore sizes or, more precisely, the volume/surface ratio of the pores, permeability. NMR has been found a uniquely useful way of studying these characteristics by overcoming the opacity problem. NMR methods make it possible to directly investigate, in a non-destructive and non-invasive way, mass transport (fluids, gases) in pore matrices, pore matrix structures, as well as mass distribution inside pore systems. A number of NMR diffusometry applications, often accompanied by relaxometry, are applied in geophysics and hydrology (porous rocks, sediment and soil columns), civil engineering (construction materials such as concrete), chemical engineering (reaction and sorption columns, catalyst beds), biomedicine (bone, tendon, cartilage) etc.

Description in English
Porous materials are of great interest, both theoretically and experimentally, in various scientific and technical areas (micelles, sponges, rocks, construction materials, wood, biological materials, etc.). For this reason it is important to have at hand experimental techniques for a proper characterization of their physical properties. The most relevant characteristic parameters of porous materials are: porosity, distribution of pore sizes or, more precisely, the volume/surface ratio of the pores, permeability. NMR has been found a uniquely useful way of studying these characteristics by overcoming the opacity problem. NMR methods make it possible to directly investigate, in a non-destructive and non-invasive way, mass transport (fluids, gases) in pore matrices, pore matrix structures, as well as mass distribution inside pore systems. A number of NMR diffusometry applications, often accompanied by relaxometry, are applied in geophysics and hydrology (porous rocks, sediment and soil columns), civil engineering (construction materials such as concrete), chemical engineering (reaction and sorption columns, catalyst beds), biomedicine (bone, tendon, cartilage) etc.

Keywords
magnetic resonance imaging, volume/surface ratio, diffusometry, spin polarization

Key words in Czech
magnetická rezonance, poměr objem/povrch diffusometrie, spinová polarizace

GA102/07/0389

Czech

Gescheidtová Eva, prof. Ing., CSc. - principal person responsible
Bartušek Karel, Ing., DrSc. - fellow researcher
Drexler Petr, doc. Ing., Ph.D. - fellow researcher
Kroutilová Eva, doc. Ing., Ph.D. - fellow researcher
Kubásek Radek, doc. Ing., Ph.D. - fellow researcher
Mikulka Jan, doc. Ing., Ph.D. - fellow researcher
Smékal Zdeněk, prof. Ing., CSc. - fellow researcher

Department of Theoretical and Experimental Electrical Engineering
- responsible department (14.3.2006 - not assigned)
Department of Theoretical and Experimental Electrical Engineering
- beneficiary (14.3.2006 - not assigned)

BARTUŠEK, K.; KROUTILOVÁ, E.; FIALA, P.; STEINBAUER, M. Numerical modelling of magnetic field deformation owing to susceptibility in samples measured using the magnetic resonance system. Acta Technica ČSAV, 2008, vol. 53, no. 1, p. 249-266. ISSN: 0001-7043.
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BARTUŠEK, K.; GESCHEIDTOVÁ, E.; KÍZEK, R.; DOKOUPIL, Z. Zpracování dat při studiu růstu raných smrkových embryí zobrazovacími MR technikami. Elektrorevue - Internetový časopis (http://www.elektrorevue.cz), 2008, roč. 2008, č. 43, s. 1-4. ISSN: 1213-1539.
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BARTUŠEK, K.; FIALA, P.; MIKULKA, J. Numerical Modeling of Magnetic Field Deformation as Related to Susceptibility Measured with an MR System. Radioengineering, 2008, vol. 17, no. 4, p. 113-118. ISSN: 1210-2512.
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GESCHEIDTOVÁ, E.; BARTUŠEK, K. Suppression of static magnetic field in diffusion measurements of heterogeneous materials. PIERS ONLINE, 2009, vol. 5, no. 1, p. 81-85. ISSN: 1931-7360.
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MIKULKA, J. Interpolace trojrozměrných dat magnetické rezonance. Elektrorevue - Internetový časopis (http://www.elektrorevue.cz), 2010, roč. 2010, č. 14, s. 1-4. ISSN: 1213-1539.
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GESCHEIDTOVÁ, E. Zvýšení diagnostické výtěžnosti při zpracování MR tomografických dat. Vědecké spisy Vysokého učení technického v Brně Edice Habilitační a inaugurační spisy, 2009, roč. 2009, č. 312, s. 1-29. ISSN: 1213-418X.
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GESCHEIDTOVÁ, E.; KUBÁSEK, R.; SMÉKAL, Z.; BARTUŠEK, K. Design of pre-emphasis compensation for MR tomograph. International Transaction on Computer Science and Engineering, 2008, vol. 45, no. 1, p. 161-173. ISSN: 1738-6438.
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KROUTILOVÁ, E.; STEINBAUER, M.; FIALA, P.; DĚDKOVÁ, J.; BARTUŠEK, K. The Back Reconstruction of Signals by the NMR Techniques. Studies in Computational Intelligence, Springer Berlin / Heidelberg, 2008, vol. 2008, no. 119, p. 139-145. ISSN: 1860-9503.
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MIKULKA, J.; GESCHEIDTOVÁ, E.; BARTUŠEK, K.; SMÉKAL, Z. Processing of MR Slices of Temporomandibular Disc for 3D Visualization. PIERS ONLINE, 2010, vol. 6, no. 3, p. 204-206. ISSN: 1931-7360.
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BARTUŠEK, K.; DOKOUPIL, Z.; GESCHEIDTOVÁ, E. DSP Based Temperature Controller in Gradient System for MR Tomography. International Transaction on Computer Science and Engineering, 2008, vol. 47, no. 1, p. 1-8. ISSN: 1738-6438.
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GESCHEIDTOVÁ, E.; KUBÁSEK, R.; SMÉKAL, Z.; BARTUŠEK, K. Digital Filter Banks in MR Measurement of Gradient Magnetic Fields. Applied Magnetic Resonance (IF 0,665), 2008, vol. 33, no. 4, p. 399-417. ISSN: 0937-9347.
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BARTUŠEK, K.; GESCHEIDTOVÁ, E. Kompenzace vlivu statického magnetického pole při MR měření difúze. Elektrorevue - Internetový časopis (http://www.elektrorevue.cz), 2008, roč. 2008, č. 29, s. 1-6. ISSN: 1213-1539.
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GESCHEIDTOVÁ, E.; BARTUŠEK, K.; LIBERDA, O. Kritéria pro výběr vlnek při zpracování obrazů. Elektrorevue - Internetový časopis (http://www.elektrorevue.cz), 2009, roč. 2009, č. 60, s. 1-5. ISSN: 1213-1539.
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MIKULKA, J. Segmentace vrstev sítnice v obrazech optické koherentní tomografie. Elektrorevue - Internetový časopis (http://www.elektrorevue.cz), 2008, roč. 2008, č. 38, s. 1-5. ISSN: 1213-1539.
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BARTUŠEK, K.; GESCHEIDTOVÁ, E.; DOKOUPIL, Z. Use of Magnetic Resonance to Determine Radial Slices of Plants. PIERS ONLINE, 2009, vol. 5, no. 7, p. 645-648. ISSN: 1931-7360.
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KROUTILOVÁ, E.; STEINBAUER, M.; DOHNAL, P.; HADINEC, M.; GESCHEIDTOVÁ, E.; BARTUŠEK, K. Inversion Reconstruction of Signals Measured by the NMR Techniques. PIERS ONLINE, 2008, vol. 4, no. 1, p. 26-30. ISSN: 1931-7360.
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GESCHEIDTOVÁ, E.; BARTUŠEK, K. Measurement of Radio Frequency Magnetic Field. PIERS ONLINE, 2007, vol. 2, no. 6, p. 555-558. ISSN: 1931-7360.
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GESCHEIDTOVÁ, E.; KUBÁSEK, R. Enhancement gradient pulse waveforms in MR tomography. PIERS ONLINE, 2008, vol. 4, no. 3, p. 341-345. ISSN: 1931-7360.
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KROUTILOVÁ, E.; STEINBAUER, M.; HADINEC, M.; FIALA, P.; BARTUŠEK, K. Numerické modelování nehomogenity v materiálech. ElectroScope - http://www.electroscope.zcu.cz, 2007, roč. 2007, č. 4, s. 1-8. ISSN: 1802-4564.
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GESCHEIDTOVÁ, E.; KUBÁSEK, R.; SMÉKAL, Z.; BARTUŠEK, K. Equiripple Digital Filter in Quadrature Mirror Filter Banks for Nuclear Magnetic Tomography. International Transaction on Computer Science and Engineering, 2007, vol. 37, no. 1, p. 141-152. ISSN: 1738-6438.
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Responsibility: Gescheidtová Eva, prof. Ing., CSc.