CT理论与应用研究Issue(3)：493-499,7.
多层螺旋 CT 胸部扫描参数的优化研究
Multislice Spiral CT Scanning on Chest of Optimization of Therapeutic
方文春 1赖丽梅 1吴治国 1吴斌 1宋俐乐 1罗晓东1
作者信息
- 1. 深圳市保健办专家门诊部放射科，广东 深圳 518020
- 折叠
摘要
Abstract
Objective: To compare the radiation dose between two different collimations on chest low-dose screen and normal using a 16-slice spiral CT, in order to provide guideline for lung low-dose screen. Methods: 100 physical examination objectors use 1.5 mm × 16 (24 mm) collimation in lung low-dose screen of anomalous. Then use 0.75 mm × 16 (12 mm) collimation to screen. They use KVP, Effective mAs, time of ration and image of thick were the same. 120 kV, 20 mAs, 0.5 s/rotation, 5 mm. To different overlap 50% reconstruct 2 mm and 1mm thick images for 3D-process. To compare image quality. Results: Four screen technique to display the focus and normal organization of the Lung were not difference. Image quality were excellent, use the wide collimation screen time and X-ray radiation protection too decrease. Conclusion: Radiation dose of 1.5 mm collimation. In lung low-dose screen is less of 0.75 mm collimation, and scan time is low. The radiation dose (CTDIvol) only for the narrow (0.75mm) detector and the conventional dose scanning for 20%, but can provide similar diagnostic information. So a collimation of 1.5mm is recommended in lung low-dose screen using a 16-slice spiral CT.关键词
多层螺旋 CT/探测器宽度/肺部低剂量/影像质量/辐射剂量Key words
milti-slice spiral CT/collimation width/lung low-dose/image quality/radiation protection分类
医药卫生引用本文复制引用
方文春,赖丽梅,吴治国,吴斌,宋俐乐,罗晓东..多层螺旋 CT 胸部扫描参数的优化研究[J].CT理论与应用研究,2013,(3):493-499,7.
