A handheld microwave device can map the water content of breast tissue at 1mm resolution to find hidden cancer cells during surgery.
April 24, 2026
Original Paper
A microwave super-resolution imaging approach towards breast cancer margin mapping
arXiv · 2604.21636
The Takeaway
Surgeons currently have to wait days for pathology reports to know if they successfully removed all of a patient's tumor. This new microwave imaging system provides a map of tissue hydration instantly while the patient is still on the table. Cancer cells contain more water than healthy fat, and this device identifies that difference with high precision. It allows doctors to see exactly where the tumor ends and healthy tissue begins in real time. This technology could end the stressful need for second surgeries caused by missed malignant cells.
From the abstract
Accurate characterisation of margins in excised breast cancer tumours is critical to the success of surgical interventions, yet margin status is typically confirmed post-operatively using histopathology. Here we present a new approach to intraoperative margin assessment based on microwave single pixel imaging, demonstrating tissue phantom hydration mapping across large areas (~10 cm x 10 cm) at ~1 mm resolution. By leveraging the photo-induced change in microwave transparency of a silicon modula