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Figure 2b: Fibroadenoma (arrows) imaged in its largest section by using (a) baseline power Doppler mode and (b) SHI mode after injection of 4.0 mL of Optison. Although the correct diagnosis (probably benign) was obtained with both modalities, note the improved display in SHI mode of small intratumoral vessels (indicating that only minimal bubble destruction is occurring) and the excellent suppression of tissue echoes.