1. A method of obtaining and displaying x-ray images of a patient's breast comprising: obtaining x-ray tomosynthesis image data Tp representative of projection images Tp taken at different angles of an origin of imaging x-rays relative to a patient's breast; computer-processing at least a subset of the Tp data into reconstructed tomosynthesis image data Tr representative of reconstructed tomosyntesis images Tr of slices of the breasts that have respective selected orientations and thicknesses; identifying an anatomical feature in one of said images that meets selected criteria of size, location and other properties; and computer-processing said reconstructed tomosynthesis image data Tr to select a tomosynthesis image Tr in which said anatomical feature is seen well; and displaying on a computer display the selected tomosynthesis image Tr in which said anatomical feature is seen well.