Carboxyl of Poly(D,L-lactide-co-glycolide) Nanoparticles of Perfluorooctyl Bromide for Ultrasonic Imaging of Tumor

Figure 5

(a) Ultrasound images obtained in vitro in nonlinear mode at different concentration at 5, 9, and 13 MHz. C1: 1.25 mg/ml, C2: 2.5 mg/ml, C3: 5 mg/ml, C4: 10 mg/ml, C5: 20 mg/ml, and C6: 30 mg/ml. (b) Effect of nanoparticles concentration on echographic image brightness with different probe frequency at 5, 9, and 13 MHz. (c) Effect of mechanical index on echographic image brightness.

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