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. Author manuscript; available in PMC: 2021 Jan 18.
Published in final edited form as: Med Phys. 1989 Jan-Feb;16(1):66–74. doi: 10.1118/1.596404

Fig. 7.

Fig. 7

Relative efficacy of radionuclides distributed exponentially in a small tumor of 0.05-cm radius. Radial dependence of dose rates is shown for 1 MBq of 32P, 67Cu, 90Y, 111Ag, 131I, 188Re, or 193mPt. The highest dose rate to about 90% of the tumor volume is delivered by 193mPt.