1. A method for analyzing a sequence of images for an object, the method comprising: identifying a region of interest in the sequence of images, wherein the object is likely to move within the region of interest; dividing the region of interest in the sequence of images into sections; calculating signal-to-noise ratios for a section in the sections, wherein a signal-to-noise ratio for the section in the sections in an image in the sequence of images is calculated using the section in the image, a prior section in a prior image to the image in the sequence of images, and a subsequent section in a subsequent image to the image in the sequence of images and wherein the signal-to-noise ratios are for potential velocities of the object in the section; and selecting a velocity from the potential velocities for the object in the section using a potential velocity in the potential velocities having a highest signal-to-noise ratio in the signal-to-noise ratios.