Explore the Application with Automatic Exposure Control Technology in Simulating Different Abdomen Phantom

• Main Authors: HUANG, BO-YEN, 黃柏諺
• Other Authors: CHEN, CHIA-HUI
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/9gw3eq

碩士 === 中臺科技大學 === 醫學影像暨放射科學系暨研究所 === 106 === This study investigated the relationship between the exposure of thickness and tube voltage. To evaluate the radiation dose appropriation for the automatic exposure control (AEC) in abdominal radiography of obese patients. The values of the exposure factors generated with various thicknesses of water phantom at 81 kVp, 85 kVp, 90 kVp, 96 kVp, and 102 kVp tube voltage were obtained by using the Phlips diagnost TH X-ray machine, the Hologic DPA/QDR-1 Anthropomorphic Spine Phantom and the self-made water phantom. Exposure dose of different phantom thicknesses under different tube voltage conditions were calculated based on the exposure factor values obtained in the above experiments. The lumbar vertebral phantom was placed in the water phantom, AEC radiography was performed on each grouping condition and the images were stored as a control group. According to the image conditions of the control group, a lower exposure factor level was used to exposure and then save the image as an experimental group. Randomly display lumbar images with the experimental group and the control group on a dual screen in the workstation the images could be distinguished that determine distinguished by 2 radiographers. Perform Cohen's kappa consistency analysis after recording the data. The result showed that AEC is suitable for thickness of 36 cm or more obese patients with a tube voltage of 102 kVp during abdomen radiography examination.