1. A method for imaging an organ with a medical imaging system comprising a radiation source, a detector facing the radiation source, an organ support and a compression paddle, wherein the compression paddle is smaller than the detector, the method comprising: offsetting the compression paddle to a position towards a side edge of the detector; moving the radiation source along a trajectory, wherein the trajectory is above the compression paddle and dependent upon the position of the compression paddle; and acquiring images of the organ at several positions along the trajectory.