Fig. 4
Non-invasive monitoring treatment and efficacy assessment through PET imaging. A Left ventricle is divided into 17 segments according to the AHA 17-segment model. B PET imaging of 68Ga-loaded GNR@SN/Gel hydrogel with PBS in vitro. C Region of hydrogel injection into myocardium visualized by 68GaCl3 PET. D Representative 17-segment polar map via 18F-FDG PET imaging of myocardial viability in each group after 1 day and 4 weeks. E Quantification of non-viable myocardium area as a percentage of total left ventricular area; F Comparison of non-viable myocardium between groups. *P < 0.05 and **P < 0.01, ***P < 0.001, ****P < 0.0001, ns > 0.05