1. A method for planning an examination of an examination object by a tomosynthesis machine, the method comprising the following steps: a) capturing raw data of the examination object, the raw data having been acquired from a plurality of defined acquisition angles; b) reconstructing an auxiliary data set from the raw data; c) calculating depth data from the auxiliary data set and calculating a number of projections from a perspective of a respectively defined projection center on a basis of the auxiliary data set or on a basis of the raw data, wherein each of the projections contains a number of image points and each of the image points is linked to the depth data associated therewith, and wherein perspectives of the projections are tilted relative to one another at least on a section of a circular path; d) displaying the projections; e) enabling at least one projection to be chosen; f) marking a position of an examination region of the examination object in the at least one projection thus chosen; and g) calculating a real three-dimensional position of the examination region using the marked position and the depth data thereof.