Gavilanez, FranklinBerenstein, Carlos A.Baras, John S.While conventional tomography is associated to the Radon transform in Euclidean spaces, electrical impedance tomography or EIT is associated to the Radon transform in the hyperbolic plane. We discuss some recent work on network tomography that can be associated to a problem similar to EIT on graphs and indicate how in some sense it may be also associated to the Radon transform on trees.en-USGlobal Communication SystemsTechnical Report