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(A) The plots of photon flux obtained with different narrow filters. (B) PET, photoluminescence (PL) and CRET luminescence images derived with various narrow filters for the 64CuCl2 (a, 150 μCi), [64Cu]CIS/ZnS RQDs (b, 150 μCi, 25 μg) ,and CIS/ZnS nonradioactive QDs (c, 25 μg) aqueous solutions, respectively. The CRET luminescence images were acquired with acquisition time of 4 min. The PL images were obtained under blue excitation light with exposure time of 0.1 s.
