Inclusion Criteria:  Stage I-III breast cancer diagnosis Between 3-6 months post-treatment with adjuvant anthracycline or taxane-based chemotherapy Postmenopausal (at least 12 months without menses; OR on ovarian suppression medication; OR status post oophorectomy) English speaking  Exclusion Criteria:  Women who have permanent ferromagnetic metal in the body, a pacemaker, or have severe claustrophobia Women who are pregnant or breastfeeding Diagnosis of alcohol or substance use disorders, or any psychoactive medication use within the past 4 months Current diagnosis of dementia, psychosis or major depressive disorders Concurrent other malignancy or metastatic malignancy of any kind Unable to give informed consent.