Dosimetry and physical treatment planning for iodine eye plaque therapy

Int J Radiat Oncol Biol Phys. 1991 May;20(5):1087-92. doi: 10.1016/0360-3016(91)90209-m.

Abstract

The dosimetry of eye plaques loaded with iodine-125 seeds (type 6702) was performed by means of computer calculations and measurements with thermoluminescent dosimeters (TLD). Measurements of the depth dose distribution (2-25.5 mm) along the transverse axis of a single seed were performed in water equivalent phantom material. The transverse axis attenuation and geometry factor F(r) was obtained by applying a least squares fit to the measured data. Based on the resulting radial dose function, a computer program was developed which calculates dose distributions within the eye for arbitrary loading and placement of the eye plaque. The computational results were verified by TLD measurements in an eye phantom.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Brachytherapy / instrumentation
  • Brachytherapy / methods*
  • Eye Neoplasms / radiotherapy*
  • Humans
  • Iodine Radioisotopes / therapeutic use*
  • Models, Structural
  • Radiotherapy Planning, Computer-Assisted*
  • Thermoluminescent Dosimetry

Substances

  • Iodine Radioisotopes