COMPOSITION AND METHOD OF MAKING THE NOVEL 3D POLYMER GEL FOR USE IN RADIATION TREATMENT PLANNING
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United States of America Patent
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Feb 19, 2015
app pub date -
Aug 13, 2013
filing date -
Aug 13, 2013
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Polymer gel dosimeters based on radiation-induced polymerization of N-(Isobutoxymethyl) acrylamide (NIBMA) polymer gels in normal atmospheric condition (NIBMAGAT) have been synthesized and studied as a new composition of polymer gel dosimeters for radiotherapy treatment planning. The dosimeters were irradiated with at absorbed doses up to 30 Gy and no change in dose response was observed even after using repeatedly for eight times. The novel composition shows no change in the relaxation rate or absorbance of the gel dosimeters up to 144 hours. Dose response of NIBMAGAT gel dosimeters increases with increase of monomer concentration. The relaxation rate of NIBMAGAT gel increases with increase of THPC concentration from 2.5 to 5 mM, but the dose response is not affected with increase of THPC concentration from 5 to 20 mM. The results show that the dose sensitivity increases significantly with increase of glycerol concentration up to ≈30% within gel dosimeters.
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