1. A method, comprising: accessing reference image data; accessing first dynamic image data; determining first pixel-shift vector data as a function of the reference image data and the first dynamic image data; accessing second dynamic image data; determining second pixel-shift vector data as a function of the reference image data and the second dynamic image data; determining third pixel-shift vector data as a function of the first pixel-shift vector data and the second pixel-shift vector data; adjusting the reference image data as a function of the third pixel-shift vector data; accessing third dynamic image data; subtracting the adjusted reference image data from the third dynamic image data; and generating resultant image data as a function of the subtracting step.