Breast nodules requiring MRI are for high-risk groups, suspicious lesions that cannot be diagnosed by mammography, suspected lymph node metastasis, the need to accurately determine the number of malignant nodules and to determine whether breast-conserving surgery can be performed. 1. Breast nodules with atypical hyperplasia on pathological biopsy, mutation of tumor suppressor gene (BRCA), history of breast cancer or family history of breast cancer are high-risk groups, and need to undergo nuclear magnetic screening. 2. Mammogram reveals suspicious lesions with unclear boundaries between the nodule and the surrounding connective tissue or suspected to be malignant. 3. Lump in axilla or enlarged lymph nodes in axilla or neck area, suspected of lymph node metastasis, but no lesion can be found in X-ray and ultrasound. Meanwhile, MRI is also needed to accurately determine the number of malignant nodules and to determine whether breast-conserving surgery is possible. It is recommended that patients who find breast nodules should go to the hospital in time for a detailed examination and communicate with the doctor in time when they find problems, and they should be treated in a standardized way under the doctor’s guidance.