A: Autoradiograph (emulsion) of rat lung section with aggregates of activity in a fibrotic zone after inhalation of MOX (7,1 % Pu). Counter staining haematoxylin-eosin. The delimited area was dissected using a microscope and fine needles. The tissue was weighed and analysed for Pu and Am following column separation and alpha spectrometry. B: Table showing measured Pu or Am activity in the dissected tissue and the different calculated isotopic fractions of MOX either at the time of inhalation (2004) or time of tissue analysis (2010).