ALB and neoplasm: Therefore, 68Ga‐labelled bovine serum albumin (68Ga‐BSA) was employed as the CR source to activate dextran‐modified TiO2 nanoparticles for inhibiting the tumor growth (Figure11a), which could emit UV light to produce electron (e−) and hole (h+) from energy band of TiO2 and generate ROS subsequently.178 By PET imaging, it has been found that intratumoral injection of 68Ga‐BSA and 18F‐FDG showed the similar tumor uptake of 68Ga‐BSA and 18F‐FDG (Figure 11b,c).