This is a feasibility study to evaluate dual-energy (DE) contrast-enhanced (CE) digital mammography to detect breast cancer in patients with increased breast density (BI-RADS category c or d). Eligible patients will be invited to have full-field digital mammography and dual-energy (DE) contrast-enhanced (CE) digital mammography to compare accuracy of the imaging methods for the detection of breast cancer.

This is a feasibility study to evaluate dual-energy (DE) contrast-enhanced (CE) digital mammography to detect breast cancer in patients with increased breast density (Breast Imaging-Reporting And Data System category c or d). Eligible patients will be invited to have full-field digital mammography and dual-energy (DE) contrast-enhanced (CE) digital mammography to compare accuracy of the imaging methods for the detection of breast cancer

Inclusion Criteria:

1. Signed informed consent
2. At least 19 years old
3. Glomerular filtration rate> 60
4. Heterogeneously or extremely dense breasts (BI-RADS category c or d).

Exclusion Criteria:

1. History of iodinated contrast allergy
2. Pregnant or lactating as determined by routine standard practice
3. Personal history of breast cancer
4. History of prior breast excisional biopsy (Patients with a history of core needle biopsy will not be excluded)
5. History of prior breast reduction mammoplasty surgery
6. History of prior breast augmentation surgery
7. Mental condition rendering the subject unable to understand the nature, scope, and possible consequences of the study.

114 patients completed both mammograms

Adverse events will be recorded on the CRFs up to 30 days after administration of the last dose of study treatment.