1. A system for imaging a body to guide a medical operation, the system comprising: a transducer to scan an anatomy; a signal processing unit coupled to the transducer to generate a plurality of first images of the anatomy, each of the first images corresponding to a particular position and orientation of the transducer relative to the anatomy; means for combining the plurality of first images of the anatomy into a recorded image of the anatomy, the recorded image having a field of view of the anatomy larger than each of the plurality of first images; means for obtaining a real time image of the anatomy during the medical operation, the real time image having a field of view of the anatomy smaller than the recorded image, the real time image containing an image of a medical device used in the medical operation in a portion of the anatomy; and means for aligning the real time image with the recorded image through correlation of imaging data from the real time image and the recorded image to determine a spatial relation between the real time image and the recorded image.