Study on radiation dose based on chrominance / 第二军医大学学报

ABSTRACT

Objective: To set up a new measurement method for radiation absorbed dose by using chrominance technology. Methods: The changes of trichromatic values were measured using color analysis technique after different concentrations of alphaurine A aqueous solutions (500 mg/L, 250 mg/L, and 150 mg/L) were irradiated with 1.5-13.5 kGy doses of γ-rays at room temperature. Immediately after irradiation, the trichromatic color testing device was used to determine the trichromatic color changes of the samples for further statistical processing, analysis, and mapping. Repeated measurements were obtained with the test samples. The samples was stored at room temperature of summer for two weeks and the above protocol was repeated. Paired t-test was used for statistical analysis. Results: The trichromatic red-green-blue color underwent evident changes with the changes of reagent concentrations and absorbed doses. There was a gradual increment of absorption value (80-360) of the red color with the increment of absorbed dose in 500 mg/L group; meanwhile, there was a decrement of absorption value (580-250) of blue color with the increment of absorbed dose, which showed that the changing trend of the red color and blue color was on contrary. Compared with the red and blue, the absorption value of green color underwent a slighter change(270-320) with the increment of absorbed doses. Despite a similar color change trend in all the experimental groups, the solution concentration and the radiation dose were the main factor for ideal trichromatic data. The change of color in the solution of lower concentration was greater within a smaller range of absorption dose. Temperature had little influence on the measuring results after the irradiated samples were kept for two weeks at the room temperature in the summer (P>0.05). Conclusion: Ionizing radiation-induced color change combined with chrominance technique may provide a new convenient method for studying radiation absorbed dose.