Fig. 2From: Slow lung clearance and limited translocation of four sizes of inhaled iridium nanoparticlesAverage whole-body iridium-192 content for 10 nm, 15 nm, 35 nm, and 75 nm aerosols: (a) normalised to whole body content at 0 h and (b) normalised to whole body content at 8 d, with theoretical plots for retention half-times of 100 days (dotted line) and 500 days (dashed line)Back to article page