摘要
Abstract
Objective The purpose of this paper is to explore the dual-source CT different imaging methods in the pulmonary artery angiography (CTA) of the influence of radiation dose and image quality. Methods A total of 100 patients who were preliminary suspected with pulmonary embolism in our hospital were included in this stuudy between September 2016 and August 2016. These patients were randomly divided into four groups according to number table method with 25 in each group (n=25). The low voltage Flash mode, executives voltage Flash mode, 80/sn 140 kV double energy scanning, and 100/sn140 kV double energy scanning were respectively used in the four groups. Besides, the image of the subjective image quality score, and measure the groups of patients with pulmonary CT value, SNR, CNR, CTDIvol, DLP and ED were obtained. Results There were no significant differences for image subjective ratings among the four groups (t=1.043, P＞1.043). The between groups of pulmonary artery trunk CT value, SNR, CNR were no statistically significant difference (P＞0.05). The CTDIvol, DLP, ED values were significantly statistical different between the four groups (P＜0.01), in which the group 1 accepted minimum radiation dose, and group 4 accepted the highest radiation dose. Conclusion Dual-source CT imaging can provid the powerful basis for diagnosis, lower tube voltage Flash and the lowest radiation dose, which is worth for further clinical use.关键词
CTA/Flash模式/双源CT/信噪比Key words
CTA/Flash mode/dual-source CT/signal to noise ratio分类
医药卫生
