With the development of technology and the improvement of people’s living standard, people’s concern for their health is also increasing. Breast diseases are common and frequent diseases among women, and more than half of them are breast tumors. Common imaging methods of breast examination include mammography, mammography, breast ultrasound, CT and MRI. In front of many imaging methods, how to choose the right one for yourself? Mammography Mammography can make early diagnosis of breast cancer and has become the imaging test of choice for breast disease diagnosis. It is mainly used as a screening tool for women over 50 years old. The disadvantages are: ionizing radiation, low resolution of dense breast (mostly in middle-aged and young people), etc. Breast ultrasound has no blind spots and has good resolution of soft tissues, and can detect small lesions of several millimeters. Mammography is non-radioactive and is the preferred screening method for breast lesions in adolescents or women during pregnancy and lactation. The disadvantage is that its diagnostic accuracy depends largely on the equipment used and the personal experience of the examining physician. Breast CT CT is generally used as a supplement to mammography and ultrasonography. It is better than mammography in detecting lesions in the dense breast, abnormal changes in the chest wall, and detecting lesions in the tail of the breast and enlarged lymph nodes in the axilla and inner breast. The disadvantages are: the dose of CT is higher than that of mammography, the cost of examination is higher, and the accuracy of cystic lesions is not as good as that of ultrasound. Breast MRI is an important complementary test to mammography and ultrasound. The advantages of breast MRI are: 1. It is more sensitive to the dense breast and local recurrence of postoperative breast cancer, which is more difficult to evaluate by X-ray plain film. 2. The tomogram can be imaged in any three dimensions, which can make the localization of lesions more accurate. The detection of multicentric and multifocal lesions and the degree of invasion of peri-mammary tissues are better than other examination methods. The disadvantages of MRI are: 1. Insensitivity to microcalcifications. 2. 2. MRI is relatively complex, takes a long time to examine, and is sometimes affected by respiratory motion artifacts. 3. There is some overlap in the MRI performance of benign and malignant lesions, so it cannot replace breast biopsy for lesions with atypical MRI performance.