title: Solid phantom material for the dosimetry of iodine-125 seed ophthalmic plaques.
abstract: OBJECTIVE
  A tissue-equivalent solid phantom material, RE-1, closely simulating the radiological attenuation and scattering properties of the human eye for the iodine-125 photon spectrum and their Compton-scattered secondary photons, was fabricated on a polyethylene base with CaCO3 and MgO as inorganic additives.
  
  
  METHODS
  A 24 mm diameter spherical phantom was made from 1.1 mm thick sheets of RE-1, and holes were drilled in which 1 mm3 TLD cubes were placed.
  
  
  RESULTS
  The radial dose function g(r), which determines the dose profile on the transverse axis, was measured in a quasi-infinite phantom of RE-1.
  
  
  CONCLUSIONS
  The values obtained deviate only slightly from those for a quasi-infinite phantom made from water-equivalent material.
authors.affiliation: Institut für Medizinische Physik und Biophysik, Universität Göttingen, Germany.
authors.forename: K P
authors.initials: KP
authors.lastname: Hermann
authors.forename: W
authors.initials: W
authors.lastname: Alberti
authors.forename: P
authors.initials: P
authors.lastname: Tabor
authors.forename: B
authors.initials: B
authors.lastname: Pothmann
authors.forename: S
authors.initials: S
authors.lastname: Divoux
authors.forename: D
authors.initials: D
authors.lastname: Harder
mesh_terms: D001918:Brachytherapy / Q000295:instrumentation / Q000379:methods*; D005134:Eye Neoplasms / Q000532:radiotherapy*; D006801:Humans; D007457:Iodine Radioisotopes / Q000627:therapeutic use*; D008961:Models, Structural; D011879:Radiotherapy Dosage
chemical_list: D007457:Iodine Radioisotopes