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. 2018 Feb;59(2):197–203. doi: 10.2967/jnumed.117.194654

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FIGURE 1. — Relative metabolite quantification in plasma after injection of either ¹⁸F-FES or ¹⁸F-4FMFES. (A and B) Representative autoradiography of reverse-phase TLC of multiple blood samplings through time after injection of either ¹⁸F-FES (A) or ¹⁸F-4FMFES (B). Band corresponding to intact tracer (red arrow) is compared with total radioactivity for each lane. (C) Tracer–to–total radioactivity ratio is expressed as percentage intact tracer. ¹⁸F-4FMFES (red curve) has significantly higher percentage intact tracer than ¹⁸F-FES (blue curve) at 20 min and afterward (n = 10; P < 0.001).