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Serine protease-responsive multimodal imaging. a) TEM image of the synthesized polydopamine-coated gold nanostars (GNS@PDA). Scale bar: 100 μm. b) Activatable NIRF imaging occurred after Cy7-labeled GNS@PDA was cleaved by FAP. Additionally, c) CT, d) PA, and e) MR imaging studies provided high spatial resolution and tissue contrast for tumor delineation. Reproduced with permission.[64] Copyright 2019, American Chemical Society.
