  We investigate what conditions allow us to extract the relative distribution
of freeze-out space and time points in an arbitrary reference frame using
tomography and source imaging. The source function may be extracted from the
two-particle correlation function measured in heavy-ion collisions using
imaging techniques. This imaged source function is related to the relative
distribution of freeze-out space and time points through a generalization of
the Radon transform found in tomography. Using tomography, the imaged source
function may be converted into the relative freeze-out distribution in the
frame of interest. We describe how the tomography may be performed in practice.
