1. Method for reconstructing a fluorescence-enhanced optic tomography image to examine a heterogeneous object of any shape comprising fluorophores and disposed in air, said method comprising: defining a dummy volume containing the object, selecting relevant sources and detectors, assimilated to points of the surface of the object, definiting relevant Green's functions, in said dummy volume, each associated with a selected source and/or a selected detector, each relevant Green's function comprising a first spatial coordinate associated with a selected source and corresponding to a point of a first face of the object, and/or a second spatial coordinate associated with a selected detector and corresponding to a point of a second face of the object, opposite the first face, adapting the relevant Green's functions to the heterogeneity of the dummy volume, illuminating the first face of the object with a fluorophore excitation light, detecting a light emitted by the second face of the object by means of a matrix of detectors, and determining the fluorophore distribution by means of said relevant Green's functions according to signals detected by the detectors.