1. A computer-implemented method for automatically determining an alignment vector for a region within an image, the method comprising: defining multiple regions within an image; selecting, from among the multiple regions, a first region within the image; identifying, from among the multiple regions, a second region within the image that is related to the first region within the image; accessing an alignment vector determined for the second region within the image, the alignment vector determined for the second region within the image being descriptive of a transformation that aligns the second region within the image with a second region within a reference image that corresponds to the second region within the image; identifying a first region within the reference image that corresponds to the first region within the image; comparing the first region within the image to the first region within the reference image; based on the comparison, determining a registration metric for the first region within the image; and automatically determining an alignment vector for the first region within the image based on the accessed alignment vector determined for the second region within the image and the determined registration metric for the first region within the image, the alignment vector determined for the first region within the image being descriptive of a transformation that aligns the first region within the image with the first region within the reference image that corresponds to the first region within the image.