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Representative images showing different tissue features. A-D) 2D ultrasound images of breast specimen. E-H) 2D photoacoustic images of breast specimen. I-L) Corresponding H&E images of breast specimen. Adipose tissue is circled by green ovals. Tumor mass is circled by red ovals. Micro-calcifications are circled by orange ovals. Breast cyst is circled by purple ovals. Fibrosis is circled by blue ovals. Scale bar: 3 mm.
