Eye Physics Model 1925

This plaque was semi-manually prototyped using a combination of a wax perimeter and slot wells machined from brass in 1997. It predates 3D printing by about 15 years. This is the that plaque proved the feasibility of comformal brachytherapy in the eye using indivdual seed collimation.

EP1925

  • 19x19mm rectangular.
  • 1.7 mm thick.
  • 18K gold alloy.
  • 25 seed positions.
  • Seeds slots are uniformly 1.35 mm deep.
  • For 22 to 26 mm diameter eyes.
  • Sterilization surface area in sq. cm:
    • Plaque ≈ 11.7
    • Template ≈ 4.4