Fig. 2
From: Quasi-dendritic sulfonate-based organic small molecule for high-quality NIR-II bone-targeted imaging
a Calcium-binding NIR-II fluorescence image (NIR-II FI) of TTQF-SO3. Imaging parameters: 1300 filter, exposure 500 ms. b Corresponding quantitative NIR-II fluorescent signals of TTQF-SO3. c NIR-II FI of different cells (3T3, 143B, and J774A.1) treated with TTQF NPs and TTQF-SO3 at different time points. Imaging parameters: 1300 filter, exposure 3000 ms. d Corresponding quantitative NIR-II fluorescent signals of TTQF NPs and TTQF-SO3 bound cells. e NIR-II FI of TTQF-SO3 in mice after intravenous injection. Imaging parameters: 1300 filter, exposure 3000 ms. f NIR-II FI of lymphatic vessels after footpad injection of TTQF-SO3 at 60 min. g Cross-sectional signal profile of lymphatic vessels in the selected region. Error bars, mean ± SD (n = 3). *p < 0.05, **p < 0.01, ***p < 0.001