New polymer gel for dose imaging in radiotherapy

VANOSSI, E. MARIANI, M. GAMBARINI, G. CARRARA, M. AND VALENTE, M.

Delft, Holanda

Congreso; 15th International Conference on solid state Dosimetry; 2007

In recent radiotherapy techniques, aimed at achieving high dose release in volumes conformal to the tumors and low dose in healthy tissue around, the high non-uniformity of the dose spatial distribution makes imperative to perform reliable 3-D dosimtry. We have nowadays treatment techniques with improved capability for tumour control while sparing normal tissue surrounding the tumour volume. In last years, a growing up interest was focused on gel dosimetry that is a very promising technique for accomplishing 3-D imaging of absorbed dose. The method is based on the analysis of a tissue-equivalent gel medium that acts by itself as continuous dosimeter. Such a dosimetric matrix is obtained by incorporating a chemical dosimeter into a tissue-equivalent gel.