Solid phantom material for the dosimetry of iodine-125 seed ophthalmic plaques.
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.
Hermann
K P
KP
Institut für Medizinische Physik und Biophysik, Universität Göttingen, Germany.
Alberti
W
W
Tabor
P
P
Pothmann
B
B
Divoux
S
S
Harder
D
D
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
D007457:Iodine Radioisotopes