3-D mammograms, cameras may improve breast exams

These undated three-picture combo handout photos provided by the Mayo Clinic show the work of researchers trying to improve breast cancer screening in women with dense breasts, which mammograms don't penetrate well. The left image is a 50-year-old\'s digital mammogram, showing no problems. The right image is that same woman's MRI, showing what turned out to be an early cancer. In the middle, Mayo Clinic researchers found the same spot with experimental "molecular breast imaging" that they hope will prove to be a cheaper, easier test than MRI. (AP Photo/Mayo Clinic)