Method of radiographic imaging for producing a three-dimensional reconstruction with a low dose of irradiation, configured to calculate a three-dimensional model of at least one predetermined object to be observed in an observation field, wherein: 1) contour lines corresponding to limits of the object and/or to lines of a higher optical density within said limits are marked on at least two radiographic images, 2) a calibrated generic model is created by adapting the size of a generic model corresponding to said object and the position of said generic model so that the respective projections of the generic model calibrated using two radioactive sources (5, 11) substantially correspond to the two radiographic images, 3) markers of the calibrated generic model whose projections on at least one of the images taken using the corresponding radiographic source are closest to the contour lines marked during step 1) are selected, 4) an envelope surface is defined, formed by rays emitted from each radiographic source and having contributed to generating said contour lines, 5) certain markers of the calibrated generic model corresponding to surfaces of said calibrated generic model that are tangential to said envelope surfaces are determined, 6) the geometric position of each marker determined in step 5) is determined by projecting said marker onto the corresponding envelope surface, 7) the three-dimensional shape of a model representing said object is calculated by deforming the calibrated generic model so that markers of the deformed generic model remain coincident with the previously determined spatial position of the markers and so that said calculated model conforms to a shape that is as close as possible to an isometry of the generic model. 1) contour lines corresponding to limits of the object and/or to lines of a higher optical density within said limits are marked on at least two radiographic images, 2) a calibrated generic model is created by adapting the size of a generic model corresponding to said object and the position of said generic model so that the respective projections of the generic model calibrated using two radioactive sources (5, 11) substantially correspond to the two radiographic images, 3) markers of the calibrated generic model whose projections on at least one of the images taken using the corresponding radiographic source are closest to the contour lines marked during step 1) are selected, 4) an envelope surface is defined, formed by rays emitted from each radiographic source and having contributed to generating said contour lines, 5) certain markers of the calibrated generic model corresponding to surfaces of said calibrated generic model that are tangential to said envelope surfaces are determined, 6) the geometric position of each marker determined in step 5) is determined by projecting said marker onto the corresponding envelope surface, 7) the three-dimensional shape of a model representing said object is calculated by deforming the calibrated generic model so that markers of the deformed generic model remain coincident with the previously determined spatial position of the markers and so that said calculated model conforms to a shape that is as close as possible to an isometry of the generic model.