Mammography is usually referred to as Mammography, which is required for confirmed or suspected breast cancer, people over 40 years of age, and people at high risk of breast cancer. 1. Diagnosis or suspicion of breast cancer: Mammography is needed when a lump or calcified foci are found in the breast, or when there is a high suspicion of cancer. In addition, those who have already been diagnosed with breast cancer will also need to undergo this test to determine the extent of the cancer. 2. People over 40 years old: The incidence of breast cancer will increase with age, so people over 40 years old are recommended to have mammography examination every one and a half years to two years. 3. People with high risk of breast cancer: genetic predisposition is a high-risk factor for breast cancer. If there is a history of breast cancer in the first-degree relatives such as parents, siblings, etc., the chances of developing breast cancer will be significantly higher than that of the general population, and regular mammography examination is needed in such cases. Mammography is a commonly used clinical diagnostic tool for breast diseases. This method can not only diagnose inaccessible breast lumps, but also detect T0 stage breast cancer characterized by a few tiny calcifications at an early stage. If you need to have an examination, you can do it under the guidance of a professional doctor.