1. A system for phase-contrast x-ray imaging for imaging an object, comprising: an x-ray source generating x-rays, at least a portion of the x-rays interating with the object; a detector positioned to receive the x-rays generated by the x-ray source after at least a portion of the x-rays have interacted with the object and output an image signal indicative of the intensity of the x-rays received, the detector being movable between a first position and a second position; and an object-map generator receiving the image signal output by the detector when the detector is in the first position and the image signal output by the detector when the detector is in the second position, the object-map generator utilizing the first position image signal and the second position image signal to generate an attenuation-map and a phase-map for the object.