Figure 6.

US image and hemoglobin concentration maps of suspicious 6-mm lesion located at 7 o’clock position in right breast of same patient as Figure 5. (a) US image demonstrates lesion (arrow). No blood vessels or blood flow were seen at color Doppler US. Biopsy result revealed benign nonproliferative fibroadipose breast tissue. (b) Total hemoglobin concentration map computed from absorption maps (not shown) obtained at 780 nm and 830 nm. No resolvable lesion was found in hemoglobin map, and maximum total hemoglobin concentration was only 24.2 μmol/L. Vertical scale represents total hemoglobin concentration in micromoles and ranges from 0 to 150 μmol/L.