The existing relation between the tomographic description of quantum states
and the convolution algebra of certain discrete groupoids represented on
Hilbert spaces will be discussed. The realizations of groupoid algebras based
on qudit, photon-number (Fock) states and symplectic tomography quantizers and
dequantizers will be constructed. Conditions for identifying the convolution
product of groupoid functions and the star--product arising from a
quantization--dequantization scheme will be given. A tomographic approach to
construct quasi--distributions out of suitable immersions of groupoids into
Hilbert spaces will be formulated and, finally, intertwining kernels for such
generalized symplectic tomograms will be evaluated explicitly
