| Summary: | 碩士 === 元培醫事科技大學 === 醫學影像暨放射技術系碩士班 === 105 === The lungs are an important organ of the human body. The effective dose of vital organs in lung cancer radiotherapy has been a concern for radiation oncologists and medical physicists. The aim is that the dose received by other vital organs of the body when radiotherapy is performed in the lungs Is it too much. In this study, a light-sensitive luminous dosimeter (OSLD) was used to assess the intensity of lung cancer in order to control the radiation intensity of lung cancer. Treatment (Intensity Modulation Radiation Therapy, IMRT) vital organ dose, the use of Varian 6MV linear accelerator, the implementation of lung cancer intensity control of radiation therapy technology to Lun Road prosthesis as a treatment props, and in the body of the radiation in the important organs and organs placed in the light Excitation light dosimeter, the measurement of vital organs of the human body effective dose. The effective dose was measured using ICRP103 and the risk of secondary cancer induced by radiation before and after the revision was calculated using Dose and Dose Rate Effect Factor (DDREF).From the experimental results that, in the use of IMRT to do lung cancer treatment, each organ has a different assessment criteria and the maximum dose value. According to the value of this study found that the thyroid and bone surface in the standard have a higher effective dose, while the other effective dose of tissue and organs is maintained within the normal standard range. The thyroid fraction was estimated to have an effective dose of 143.6 mSv at 6MV and 142.8 mSv at 10MV, while the 6MV on the bone surface had 147.2 mSv and an effective dose of about 145 mSv at 10 MV. Where the effective dose of the bone surface is quite high, thus increasing the probability effect and the carcinogenic rate, leading to the risk of secondary carcinogenesis risk increased many, although the effective dose is still within the safe range, but does not rule out the second carcinogenic area.
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