1. A method for automatically registering an anatomical image with a physiological image, said method comprising: acquiring an anatomical image of a heart using a first imaging modality; acquiring a physiological image of the heart using a different second imaging modality apparatus; identifying, by a module, a myocardium of a left ventricle using the physiological image; defining, by a module, an outer surface of the left ventricle using a perfusion image; automatically scoring, by a module, a plurality of pixels in the anatomical image that are within a predetermined distance of the outer surface of the left ventricle myocardium identified in the physiological image; and registering, by a module, the anatomical image with the physiological image based on the score.