What dose would you use for a plaque brachytherapy for a melanoma involving the iris?

The following isotopes have been used for radioactive plaque therapy to treat choroidal melanomas: ¹²⁵I, ¹⁰³Pd, and ¹³¹Cs as low-energy seeds, and ¹⁰⁶Ru as β emitter. The dose used for uveal melanomas is between 80-90Gy with most studies reporting doses ~85 Shields et al., PMID 10980767. In this lar...