Supplemental figure 1. High resolution VSVs for electron emissions (top) and photon (bottom) emissions of I-131, Lu-177 and Y-90 in soft tissue, with error bars. Voxel sizes: 0.5 mm for electrons and 1.0 mm for photons. Supplemental figure 2. Comparison of the high-resolution VSVs (top) and relative deviations1 (bottom) obtained for Lu-177 by interpolation (red) and fit (green) (details in section III.1 of the paper) to the values obtained by dedicated Monte Carlo calculations for electrons – VS=0.5mm- (left) and photons – VS=1.0mm- (right). 1 The relative deviations were calculated as the difference between the value calculated with the analytic method presented in this work and the direct MC simulation divided by the VSV corresponding to the source voxel (electrons + photons contributions) Supplemental figure 3. VSVs and relative deviations obtained by the resampling method, for electrons (left) and photons (right) from Lu-177, as compared with those obtained by Monte Carlo simulation. Integer voxel ratio, voxel size=3.0 mm. Supplemental figure 4. VSVs and relative differences obtained with the final chosen method (see section III.3 of the paper for the details), for electrons (left) and photons (right) from Lu-177, as compared with those obtained by Monte Carlo simulation. Not integer voxel ratio, voxel size=4.8 mm.