Table 2.

Summary of fitting parameters (p, µ, and σ) obtained from one- or two-peak Gaussian fits to histograms in Figure S3 and S4 in Supporting Information corresponding to small-sized (FS=0–100) microbubbles, where p, µ, and σ represent population fraction of each peak (i.e. p1 + p2 + p3 = 1), mean fluorescence intensity (FI), and standard deviation respectively.

DiC18-B Concentration [nM]	µ1 ± σ1	p1	µ2 ± σ2	p2	µ3 ± σ3	p3
0 (2 h)	0	0.518	390±130	0.482	/	/
2 (2 h)	0	0.514	390±132	0.482	593±32	0.004
20 (2 h)	0	0.671	435±79	0.321	581±71	0.008
40 (2 h)	0	0.466	420±150	0.525	609±60	0.009
200 (2 h)	0	0.654	419±111	0.316	569±84	0.030
0 (20 min)	0	0.350	345±144	0.650	/	/
200 (20 min)	0	0.526	433±142	0.386	643±133	0.088