中国医疗设备2017，Vol.32Issue(5)：11-14,4.DOI:10.3969/j.issn.1674-1633.2017.05.003
低辐射剂量和低对比剂用量在门静脉血管成像技术的应用
Applications of Low Radiation Dose and Low Contrast Agent in Portal Vein Vascular Imaging
李剑 1石磊 1刘豹 1王栋 1杨红兵 1刘从伟 1吴志斌 1石明国1
作者信息
- 1. 第四军医大学西京医院 放射科,陕西西安 710032
- 折叠
摘要
Abstract
Objective To obtain optimal images for portal vein blood vessels under low radiation dose and low contrast agent condition, the present study performed image capturing via application of dual-energyportal venous phase scan mode, as well as reconstructing images via fusion coefficient reconstruction model. Methods Sixty patients that were going to undergo portal vein angiography were randomly divided into A, B groups, and each group contained 30 cases. Group A was conducted dual-energy scanning with the dosage of contrast agent of 1 mL/kg. Group B was conducted normal scanning with the traditional single energy of 120 kV, the contrast agent dosage of 1.2 mL/kg. The CT value of the portal vein and the noise of the images were measured, the value of the SNR and CNR were calculated. In addition, the quality of the images was evaluated by two radiologists under a model of five points. Finally, SPSS 17.0 software were utilized to conducting statistical analysis on the data of the images. Results The CT value of the portal vein Group A and group B were separately more than 175 HU and 124 HU. There was a statistical difference between these two groups. Compared with group B, the image quality of group A was obviously improved, and the image scores were significantly higher than that of group B. The image score of group A was (4.4±0.5), and the image score of group B was (3.8±0.38). It was statistically significant between these two groups (P<0.05). The radiation dose of group A was lower than that of group B, with a decrease of 35%. Conclusion High quality of portal vein blood vessel image could be obtained by using double energy scanning and fusion coefficient reconstruction model to reconstructed images. Meanwhile, the radiation dose was lower and the contrast agent dosage was decreased nearly by 35%. However, compared with the traditional single energy scanning, the portal vein blood vessels average CT value of the dual-energy scanning was increased by more than 60 HU. Therefore, it is worthy of clinical expansion.关键词
双能量扫描/低辐射剂量/低对比剂/门静脉/能谱CTKey words
dual-energy scanning/low radiation dose/low contrast agent/portal vein/energy spectrum CT分类
医药卫生引用本文复制引用
李剑,石磊,刘豹,王栋,杨红兵,刘从伟,吴志斌,石明国..低辐射剂量和低对比剂用量在门静脉血管成像技术的应用[J].中国医疗设备,2017,32(5):11-14,4.
