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Gold nanorods tailored as tracers for sentinel lymph node biopsy imaged by photothermal optical coherence tomography

Gold nanorods (GNRs) have been demonstrated as a scattering imaging agent or therapeutic agent. Because of their narrow window, biocompatibility, and uniform small size for blood circulation, GNRs are well suited to serve as imaging contrast agents. Especially, strong phothothermal (PT) effect is attractive for diagnostic (e.g. sentinel lymph node biopsy) or therapeutic (e.g. PT therapy) purposes. In this paper, we demonstrate GNRs as multipurpose agents with PT-optical coherence tomography (OCT) for imaging sentinel lymph node. The results show that GNRs are promising for imaging contrast enhancement for visualizing the detailed functions of SLN.