| Summary: | 碩士 === 中山醫學大學 === 生物醫學科學學系碩士班 === 101 === The chest and abdominal radiography are the most commonly performed diagnostic X-ray examination from statistics. The lung and heart disease among the people of Taiwan one of the top ten causes of death, from the Bureau of Health Statistics. The chest X-ray examination is an early diagnostic tool for lung or heart disease. The abdominal X-rays can be observed in abdominal organ size, location, and provides much important diagnostic information.
This study investigates the chest and abdominal X-rays to assess the optimization of the image quality and radiation dose. First, we will collect clinical data, BMI was used to define different size (lean, normal, obese body), and the design of different radiation exposure parameters. Different thickness of acrylic was exposure by the automatic exposure control (AEC) system to simulate the human body from the current-time product. To analyze image quality, we used two image plates to evaluate the image quality score by commercial software. And, we evaluated the effective dose of different exposure condition by the simulation of Monte Carlo software (PCXMC) and the experiment of Rando phantom filled with thermoluminescent dosimeter (TLD). The figure of merit (FOM) for optimization is defined as the inverse of image quality figure (IQFinv) square per effective dose. We analyzed the FOM of the chest and abdomen X-ray images and doses in different exposure parameters with three different sizes. By the FOM comparison to find the optimization of exposure parameter in different body size patients for chest and abdomen radiography.
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