1. A method of identifying aorta exit points from imaging data, the method comprising: identifying an aorta object from imaging data; calculating a vesselness score for a plurality of voxels in a ring around the identified aorta object; applying a first threshold to the calculated vesselness score for the plurality of voxels; identifying a possible exit point based on the applied first threshold; if greater than one possible exit point is identified, identifying a closest possible exit point to the aorta object; and if greater than one closest possible exit point is identified, identifying an exit point by selecting the closest possible exit point having a maximum width.