Evaluation of radiation dose distribution on Fluoroscopy

• Main Authors: XIAO,YU-JIE, 蕭郁潔
• Other Authors: LIN,CHENG-HSUN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/25m3x7

碩士 === 中臺科技大學 === 醫學影像暨放射科學系暨研究所 === 107 === The Atomic Enengy Council (AEC) conducted a programme to maitain the quality image under fluoroscopy since 2018. The medical staffs including radiologist, radiographer, assisted nurse are invesitable exposed to the radiation. The dose distribution depends on the location in the room, different kind of modalities, and the dose protocols. 　　78 TLD-100H (Harshaw, USA) were allocated in the matrix of space of 300×180 cm². Seven cotton threads were fixed on a pole with both ends, 11 TLDs were set at a distance of 30cm equally. Thus, 77 TLDS were allocated at one level. Five levels were set at 85cm, 95cm, 125cm, 155cm, and 180cm from floor to measure the radiation in a room undergoing fluoroscopy. Three models wore apron and simulated the standard position in a room to simulate regular examinations. Each level were exposed three time for justifications. Fluoroscopic time were set respectively at 10sec, 20sec, 30sec, 60sec, 90sec, 120sec, and 150sec. 　　The average dose from first level to the fifth one respectively of 1.46±0.45mGy、1.54±0.69 mGy、2.12±0.82 mGy、1.42±0.56 mGy、1.36±0.38 mGy。According to the result, the average dose at 125cm reaches highest dose but still lower than the allowance of the regulation in Taiwan. Aside from this findings, one result was suggested that medical staffs would also be a source of scatter radiation during fluoroscopy, a 30 cm between two staffs was suggested accordingly.