1. A method for imaging, the method comprising: obtaining image information including image timing information; obtaining motion information corresponding to an external movement by a patient being imaged, the motion information including motion timing information, wherein obtaining the motion information comprises detecting motion of the patient with a sensing device that does not engage the patient; generating an associated image by associating the motion information with the image information using the image timing information and the motion timing information; and forming an image representative of a portion of the patient using the associated image and motion information; wherein obtaining motion information comprises estimating a breathing motion based upon a sensed heart rhythm, the method further comprising: dividing the image information into a plurality of groups, each group representing a portion of a breathing cycle; processing the plurality of groups separately to form separate group image information; and forming a combined image using the separate group image information.