There are relevant researches on breast MRI and mammography, the two methods of diagnosis and comparison of early breast cancer, and it is found that the diagnosis rate of MRI is slightly higher than that of mammography. MRI is to use the principle of magnetic resonance to scan and analyze the breast condition, multi-level and three-dimensional, which can accurately observe the size, shape, course and scope of the patient’s lump with or without metastasis, with high resolution. Molybdenum target is a kind of plane map, simple, repeatable, can analyze the calcification of the mass, but for the mass of dense or small volume, easy to miss the diagnosis and misdiagnosis phenomenon, for young women to carry on the molybdenum target examination effect is poor. However, the cost of MRI is high and the examination takes a long time, which is not tolerated by patients who cannot hold the same position for a long time.