Fig. 7.

a Structure of conventional type-II QDs and TEM. b Images of the surgical field in a pig injected intradermally at the right groin with 400 pmol of NIR QDs. Reproduced with permission from [118]. Copyright 2004, Nature publishing group. c Structure of PEG-Lip-ICG and ICG was well dispersed, the UV–vis absorption spectra and OP fluorescence spectra are shown in the later pictures. d NIRF images from animals before and after intradermal injection of ICG and PEG-Lip-ICG in the left rear paw with series of time. e Representative images of Chy mouse (left), a model of lymphatic dysfunction and Wild-type littermate mice (right) after intradermal injection of PEG-Lip-ICG. Reprinted with permission [123]. Copyright 2010, American association cancer research