Breast mr exam, which is short for breast MRI. This type of examination is free of any radiation and can be repeated without any damage to the body. Especially, specializing in breast MRI, it can fully analyze the internal tissues of the breast as well as the blood vessels, which is a good clinical guide for determining benign and malignant tumors of the breast. It is a good guide to detect early malignant tumors, and it is a kind of examination with high accuracy except for pathological examination. However, the examination cost is higher than ultrasound and mammogram. If breast lumps or abnormalities are found, ultrasound examination of breast can be done first, and further MRI examination of breast can be done according to the specific situation. Women can do a good self-examination by touching their breasts with their four fingers and go to the hospital in time if they find lumps or abnormalities.