Estimation of Organ Dose in the Rat Exposed to X-rays for Radiobiological Study by TLD Implantation Method

概要

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The ratio of organ dose to surface dose in a rat exposed to conventional therapeutic X-rays was measured by TLD implantation method. Pieces of TLD-100 (LiF) in ribbon (The Harshaw Chemical Company) were implanted surgically into the organs of a rat carcass such as the liver, spleen, testis and femur. After the whole body irradiation with therapeutic X-rays, the ratio of thermoluminescence intensities was determined between the implanted TLD and the one fixed on the rat surface facing the X-ray source. The problems affecting the accuracy in the results were examined, which were the contamination of TLD surface with body fluid, the direction dependence of thermoluminescence response and the variation in the effective energy within a rat body. It was found that the dose attenuation due to absorption by the rat tissue itself should not be neglected in the energy range lower than about 80 keV in effective energy.
日本放射線影響学会の論文