Eye Physics Model 1821
18 mm diameter.
Base coverage at 6 mm Rx height: 12 mm diameter tumor + 2mm margin.
2 mm thick.
18K gold alloy.
21 seed positions.
Seeds become progressively shallower with distance from the center of the plaque to improve dose homogeneity at the edges of the plaque.
For 22 to 26 mm diameter eyes.
Sterilization surface area in sq. cm:
Plaque ≈ 9.0
Template ≈ 3.5
Model 1821-24 for 24 mm diameter spherical eye sample dosimetry