Inclusion Criteria:

1. Provide written informed consent through a signed and dated consent form.
2. Demonstrate commitment to complete all study requirements and maintain availability for the full study duration.
3. Be female, aged 18 to 94 years (inclusive).
4. Have a recent BI-RADS® 4 or 5 classification confirmed through breast imaging and medical records.

Exclusion Criteria:

1. Active skin lesions (open wounds or unhealed sores) on either breast.
2. Implanted medical devices (pacemakers, defibrillators) or MRI incompatible materials that cannot be temporarily removed.
3. Current pregnancy or breastfeeding status (self-reported).Documented hypersensitivity to silicone or gadolinium-based contrast agents.
4. Previous bilateral mastectomy.
5. Physical inability to maintain a supine position for 30 minutes.
6. Breast anatomy incompatible with ATUSA device specifications.
7. Recent (within 12 months) breast surgery or cancer treatment.
8. Negative findings on diagnostic ultrasound examination within 30 days of Screening, but prior to initiating study required procedures.
9. Any medical or psychological condition that, in the Principal Investigator's judgment, could affect study participation or data integrity.