1. A method for tomographic reconstruction of a 3D image object corresponding to a data set, the method comprising: reconstructing, by a processor, a first tomographic reconstructed object from the data set, the data set being for an imaged volume; determining, by the processor, a pixon map based on the first tomographic reconstructed object and the data set; based on the pixon map, 3D pixon smoothing, by the processor, the first tomographic reconstructed object thereby creating a first smoothed object; and outputting the first smoothed object as the 3D image object.