Figure 1: This figure shows images captured using a PTOCT system, demonstrating the utility of GNRs as exogenous contrast agents in a mouse ear in vivo. (a) The PTOCT signal (shown in green) generated by Matrigel injected into a mouse ear as a control, (b) is overlaid on an OCT image of the same tissue, with red and blue coloration representing Doppler signals. (c) The PTOCT signal generated by 400pM GNR in Matrigel after injection into a mouse ear (d) overlaid on an OCT image of the same. Reproduced with permission from Tucker-Schwartz et al. [22].