Comparison of Positron Emission Tomography and X-ray radiography for studies of physical processes in sandstone

Abstract The migration of moisture in cores of porous homogeneous sandstone of Ledian age (Belgian Eocene, Tertiary) is monitored with PET ( P ositron E mission T omography) and micro-focus X-ray radiography. In the case of PET, a nuclear medical imaging technique, 55 Co-EDTA ( E thylene d iamine T etra a cetic acid) and R- 18 F were used as water-soluble tracers. The X-ray projection method has evolved from the better-known medical technique and allows a fast and accurate determination of the two-dimensional transient moisture content profiles. Results indicate that both techniques can deliver important information concerning physical processes in situ .

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