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Solid Earth An interactive open-access journal of the European Geosciences Union
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Volume 7, issue 4
Solid Earth, 7, 1217–1231, 2016
https://doi.org/10.5194/se-7-1217-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Pore-scale tomography & imaging - applications, techniques...

Solid Earth, 7, 1217–1231, 2016
https://doi.org/10.5194/se-7-1217-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 18 Aug 2016

Research article | 18 Aug 2016

Geoscientific process monitoring with positron emission tomography (GeoPET)

Johannes Kulenkampff, Marion Gründig, Abdelhamid Zakhnini, and Johanna Lippmann-Pipke Johannes Kulenkampff et al.
  • Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany

Abstract. Transport processes in geomaterials can be observed with input–output experiments, which yield no direct information on the impact of heterogeneities, or they can be assessed by model simulations based on structural imaging using µ-CT. Positron emission tomography (PET) provides an alternative experimental observation method which directly and quantitatively yields the spatio-temporal distribution of tracer concentration. Process observation with PET benefits from its extremely high sensitivity together with a resolution that is acceptable in relation to standard drill core sizes. We strongly recommend applying high-resolution PET scanners in order to achieve a resolution on the order of 1 mm.

We discuss the particularities of PET applications in geoscientific experiments (GeoPET), which essentially are due to high material density. Although PET is rather insensitive to matrix effects, mass attenuation and Compton scattering have to be corrected thoroughly in order to derive quantitative values.

Examples of process monitoring of advection and diffusion processes with GeoPET illustrate the procedure and the experimental conditions, as well as the benefits and limits of the method.

Publications Copernicus
Short summary
Transport processes can be observed with input–output experiments, disregarding the impact of heterogeneities, or they can be modelled, based on structural images. In contrast, positron emission tomography (PET) directly yields the spatio-temporal distribution of tracer concentration. PET benefits from its molecular sensitivity together with a reasonable resolution. We illustrate its use with examples of process monitoring of advection and diffusion processes, and we discuss benefits and limits.
Transport processes can be observed with input–output experiments, disregarding the impact of...
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