An AB-MRI is performed on the same scanner as a full breast MRI. The AB-MRI is more affordable and faster lasting around 15 minutes, whereas the full breast MRI lasts between 30 and 45 minutes. A full breast MRI is typically for women with a high lifetime risk of breast cancer or women with a strong family history of breast cancer or a known genetic predisposition to breast cancer. AB-MRI is intended for women with dense breasts who are at average risk of breast cancer.