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Amount of glass microspheres injected in pig livers as a function of time from microsphere calibration (4, 8, 12 or 16 days), resulting in spheres of different specific activity and concentrations. Reprinted from European journal of nuclear medicine and molecular imaging with permission of Springer Nature (Eur. J. Nucl. Med. Mol. Imaging 2020, 47, 816–827).
