[Polymer gel dosimetry--the dose response for X-ray irradiation].

Polymer gel dosimetry has been considered a promising technique for clinical use, but this potential has not yet been fully realized in Japan. One reason may be because the commercialized gel detector, BANG gel, is expensive and it is only produced abroad. A second reason is the difficulty of controlling dose sensitivity of the gel so that it is stable under ordinary clinical conditions.

[Comparison evaluation of polymer gel with a water phantom.].

We have investigated the properties of three polymergels: G gel, A gel, and C gel. These polymer gels changed only the chemical reagent for the gel. The water equivalence was determined by comparing the polymer gels macroscopic photon and electron interaction cross sections over the energy range from 10 KeV to 50 MeV and by Monte Carlo modeling of percentage depth doses.