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Ultrasound and photoacoustic behavior of FGO. (A) Ultrasound imaging of FGO, (B) Agar and (C) perfluorocarbon microbubbles (PFCMB) in a 40MHz linear array transducer. (D and E) Photoacoustic FGO gelatin phantom under a 21MHz ultrasound equipment coupled with a VisualSonics Vevo LAZR system at 720nm. (F) Photoacoustic normalized signal spectrum of FGO (blue) and GO (black).
