The main difference between mammography and ultrasound is that the detection means are different and the detection instruments are different, as follows: 1. Mammography: is an X-ray examination, through radioactive irradiation, the patient’s internal breast lesions can be found, and if there are nodules inside the breast, the general benignity and malignancy of the nodules can be understood. 2, breast ultrasound: ultrasound to understand the internal lesions of the breast, you can determine the classification of the nodules, but also to understand the specific circumstances of the patient’s breast hyperplasia, and so on. Generally speaking, breast ultrasound is more common and can be used as a screening test for breast nodules. If the nodule is suspected to be malignant during the ultrasound, it can be combined with a mammogram to make a joint determination.