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FIGURE 3. MIRD schema is illustrated. Terms in absorbed dose equation that are independent of radionuclide biodistribution have been compiled and tabulated as S values. S values are tabulated for individual radionuclides according to source-target region pairs. When source-target regions are individual organs or subregions of organs, fixed geometry models are required to establish geometry, relative orientation, composition, and mass of different source-target organs or organ subregions.
