1. A method for determining temporal changes of a selected object comprising the steps of: a. generating a first set of slices of the selected object; b. generating a second set of slices of the selected object; c. correlating each slice of the first set of slices with a corresponding slice of the second set of slices; d. aligning each slice of the first set of slices with the corresponding slice of the second set of slices to maximize the overlap of each slice of the first set of slices with the corresponding slice of the second set of slices; e. determining a difference between each slice of the first set of slices and the corresponding slice of the second set of slices; and f. displaying the difference illustrating the temporal changes associated with the selected object.