Different tracers were used: hexamethylpropyleneamine oxime (brain), dimercaptosuccinic acid (kidney), colloids (liver and spleen), and macroaggregated albumin (lung).
Vincent Keereman, Yves Fierens, Christian Vanhove, Tony Lahoutte, Stefaan Vandenberghe 2012, 'Magnetic Resonace–Based Attenuation Correction for Micro–Single-Photon Emission ComputedTomography', Molecular Imaginghttps://doi.org/10.2310/7290.2011.00036. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)