<qa>  What is the rate of recall of patients for further work-up?We anticipate that with stereo mammography the mammographers will detect subtle lesions in the stereo images that are missed in the non-stereo images. We also expect that there will be fewer false positive detections with the stereo images compared to the standard images. Finally, we also expect that the mammographers will be more confident in their judgments of what they see in the stereo images, resulting in a reduced rate of recall of patients for further work-up. 