1. A computer-implemented method for segmenting a three-dimensional medical image, the method comprising: receiving the three-dimensional medical image to be segmented; creating a first stack of two-dimensional images from a first plane of the three-dimensional medical image; segmenting, by a processor, the first stack of two-dimensional images using a first neural network model; and determining, by the processor, a label map for the three-dimensional medical image by aggregating segmentation results of the first stack of two-dimensional images, the label map associating anatomic structure with elements of the three-dimensional medical image.