Using positron emission tomography (PET) to determine liquid content in overflowing foam

- Liquid content measurements in foams and froths are limited by their opaque nature.
- Positron emission tomography was used to measure the dispersion of a liquid tracer.
- The density of PET lines of response was used to find the liquid content of 2D foam.
- The liquid content at the interface was 0.36 decreasing to 0.03 at the surface.
- This technique can be applied to liquid content in 3D foams and flotation froths.