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The production of spherical monodisperse iron-oxide microparticles in the size range between 0.8 and 5μm is described. The particles can be ferrimagnetic (Fe 3 O 4 ) or non-magnetic (α-Fe 2 O 3 ). The particles were radiolabeled with 99m Tc or 111 In, and the leakage of the radiolabel within 24h was 0.1% in the human lung. The particles can be used to...
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