An imaging system employs method of labeling orthogonal images. The method comprises: identifying a primary image taken in a first plane; identifying a plurality of secondary images taken in planes orthogonal to the first plane; associating a label to a point in the primary image; calculating a distance from the point to a line of intersection between the primary image and each secondary image in the plurality of images; and associating the label to a secondary image in the plurality of secondary images having a line of intersection with the primary image closest to the point.