ESTRO Brachytherapy for Prostate Cancer 2018

I-125

Pd-103

Cs-131

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4.6mm long and 0.8mm diameter I-125 adsorbed on silver rod, encased in titanium Energy 27.4 & 31.4keV x-rays (electron capture) Also 35.5keV gamma photons Half-life of 59.4 days

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4.6mm long and 0.8mm diameter Pd plated graphite pellets 0.9mm x 0.6mm

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Short half-life (9.7 days) may provide radiobiological advantage for some prostate cancers  -ray emitter with highest peaks from 29 to 34 keV Clinical protocol developed in Texas Cancer Center by Prestidge et al.

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Titanium end cap Half-life 17 days Energy 20.8 KeV

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