摘要
60例头颈部CTA受检者随机等分为双低组和对照组。双低组采用100 kV的管电压、浓度为270 mgI/mL的对比剂50 mL联合应用快速迭代重建算法,对照组采用120 kV的管电压、浓度为370mgI/mL的对比剂50 mL。比较两组头颈部血管内CT值、噪声(SD)、CNR、SNR、图像质量评分、CTDIvol、DLP,评价其图像质量及辐射剂量。结果显示,双低组颈部血管CT值略低于对照组,颅内血管CT值略高于对照组;两组图像质量均满足临床诊断需要;双低组联合快速迭代重建技术(iDose),噪声(SD)较对照组减低,SNR、CNR较对照组增高;双低组辐射剂量较对照组明显降低,CTDIvol、DLP分别降低约51%、56%。因此,低管电压、低对比剂剂量及浓度联合应用快速迭代重建技术(iDose)进行头颈部CTA检查是可行的,图像质量能完全满足临床诊断需要,而且辐射剂量明显降低。
To explore the feasibility of low tube voltage, small dose and low concentration of contrast media combined iDose in head and neck CTA, 60 cases undergone head and neck CTA were randomly and divided into experimental group and control group. 100 kV tube voltage and 50mL contrast agent with 270 concentration combined with rapid iterative reconstruction algorithm were used in the experimental group, equally mgI/mL while 120 kV tube voltage and 50mL contrast agent with 370 mgI/mL concentration were used in the control group. The CT value, noise （ SD ） , CNR, SNR, image quality score, CTDIvol and DLP of the two groups were compared, and the image quality and radiation dose were evaluated. The results showed that the CT value of the cervical vessels in the experimental group was slightly lower than that of the control group, and the CT value of the intracranial vessels was slightly higher than that of the control group. The image quality of the two groups met the clinical diagnostic needs. The noise （ SD ） of the experimental group combined with iDose technique was lower than that of the control group, while the SNR and CNR were higher than those of the control group. The radiation dose of 理 the experimental group was significantly lower than that of the control group, and the CTDIvol and DLP decreased by about 51% and 56%, respectively. Therefore, low tube voltage, small contrast media dose and low concentration combined with rapid iterative reconstruction （ iDose ） for head and neck CTA examination is feasible. The image quality can fully meet the clinical diagnostic needs, and the radiation dose is significantly reduced.
作者
郭文强
GUO Wen-qiang(Medical School,Shanxi Datong University,Datong 037009,China)
出处
《辽东学院学报（自然科学版）》
CAS
2018年第4期253-258,共6页
Journal of Eastern Liaoning University:Natural Science Edition
基金
山西大同大学2013年校级科研项目(2013K7)
