2026-11-092026-11-09https://scholars.csmu.edu.tw/handle/123456789/38387This project proposes to evaluate medical doses or exposures of patients who receive x-ray examinations with higher frequency, and CT examinations with highest dose. Those evaluations will involve x-ray and CT examinations of head, neck, chest, abdomen, pelvis and spine. The importance of this project bases on the previous publication by the UNSCEAR (United Nations Scientific Committee on the Effects of Atomic Radiation) Report 2000, which mentioned the largest man made source of ionizing radiation exposure to the world population was from diagnostic medical x-rays of 80-90 %. More attentions and considerations should be paid to the diagnostic medical x-rays in lowering patient dose levels with acceptable image quality. This proposal supposes to complete the below steps. Fist of all, we will hold twice national wide surveys on the first and third year of this study in order to evaluate the medical exposures and doses to patients. Next, to set up standard operation procedure of diagnostic radiographic quality assurance and to measure the reference dose, such as entrance surface dose and computed tomography dose index, in several representative hospitals are helpful of comparison of effective doses obtaining from several methods. After that, we will establish Taiwan voxel phantoms for Monte Carlo simulations and compare the simulated organ doses with the TLDs evaluation results in an anthropomorphic RANDO phantom. Then, Taiwan diagnostic reference levels will be determined by the experimental and the simulated methods. Finally, trends of x-ray examinations and computed tomography examinations at current stage and several years ago will be analyzed and compared. The achievements of this study includes creating database of medical exposures and doses for diagnostic radiation examinations in Taiwan, developing Taiwan voxel phantoms, and realizing the evolution of digital radiography and the mutislice CT in Taiwan.本計畫擬針對台灣醫學診斷設備中，檢查頻次最高的一般X光檢查，以及造成受檢者劑量最高的電腦斷層檢查，含頭部、頸部、胸腔、腹腔、骨盆腔檢查等，進行對受檢者造成輻射曝露劑量調查之研究。本計劃的重要性乃在於國際研究單位所公佈的資料中顯示，X 光診斷的病患劑量就佔了全部醫用輻射的80-90%，因此不容輕忽且應予重視。本計劃的研究內容包含下列步驟：首先，將透過第一、三年的全國性大規模問卷調查瞭解台灣醫學診斷設備對就診病人造成之輻射曝露；其次，建置標準化的放射診斷品質保證劑量量測方法，並到數十傢俱代表性的醫療院所進行實地量測參考劑量，並比對各種方法所評估出的有效劑量；再者，建置台灣3D體素假體的模型以蒙地卡羅方法模擬器官劑量，與類人型假體的實驗結果比較之；接下來，根據實驗結果與模擬結果建立標準化的劑量推定方法，並且推定台灣的診斷參考劑量水平；最後，研究台灣X光檢查與電腦斷層檢查趨勢，並與數年前本研究團隊所評估的結果相比較。本計劃的研究成果所包含的台灣醫學診斷設備對就診病人造成之輻射曝露之資料庫、台灣體素假體的模型、並且數位化攝影與多切片CT在台灣的演進趨勢，都將有助於全盤暸解台灣現況，並給合宜的建議。Project