1. A method of producing an image of a scanned object corrected for artefacts introduced by unwanted motion of said object during the scan comprising the steps of taking a k-space image data set comprising a number of data points derived from the object scan, forming an first data set from some of the k-space image data points, adding at least one additional data point to the first data set to form a second data set, comparing a first image generated from the first data set to a second image generated from the second data set to determine if there has been any object motion, and correcting the second image to compensate for the object motion.