1. A method of improving the consistency of coronary calcium scoring, the method comprising: imaging a phantom with an imaging device; measuring a spatial resolution from the image of the phantom; comparing the measured spatial resolution of the image of the phantom against a reference spatial resolution; choosing a filter algorithm that will alter the spatial resolution of the image of the phantom to substantially match the reference spatial resolution; and applying the filter algorithm to images thereafter acquired with the imaging device to create a filtered image that has a spatial resolution that substantially matches the reference spatial resolution.