A method and apparatus for imaging including reconstruction of an image of
an object from a set of projections acquired for different positions of
an acquisition apparatus around the object to be imaged and in which a
projection source is situated at a finite distance relative to the
acquisition apparatus. The method includes undertaking a set of
rectifications of projections acquired for different positions of the
acquisition apparatus, rectifications comprising transforming the data of
the projection acquired projection into projection data on a virtual
rectification support placed in a preset orientation in concordance with
a set of reconstruction calculation points distributed over the image to
be reconstructed.