Dosimetric comparison of seed-less and multi-seed 125 I eye plaque: a Monte Carlo study.

Monte Carlo-based dose distributions such as central axis depth dose, lateral off-axis dose profiles and 2-dimensional isodose distributions for three different plaque diameters 10, 14 and 20 mm are calculated and compared with the dose distributions of analogous seed-less plaques.

Seed-less plaque of 10 mm diameter produces comparable dose distribution with the corresponding multi-seed plaque design.

Seed-less plaques of 14 mm and 20 mm diameter deliver dose rates approximately twice as high as the corresponding multi-seed plaques.