· Comparison of Positron Emission Tomography and X-Ray Radiography
for Studies of Physical Processes in Sandstone
PET
can be applied by labelling the substance of interest with a positron emitting
radionuclide. Can be short-lived isotopes e.g C11, O15, N13 and F18 or, longer
lived water soluble isotopes e.g. Ga and Co for studying slower processes. This
study looks at the migration of water in sandstone with water-soluble tracers. They
used tracers of two different sizes since flooding depends on
permeability.
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