摘要
目的:探讨Revolution CT在头颈、主动脉及双下肢CTA一站式联合成像中的临床应用价值。方法:回顾性分析应用Revolution CT行CTA检查的47例患者,其中A组14例行头颈、主动脉及双下肢CTA多部位一站式扫描。B组18例行头颈CTA单部位常规扫描。C组15例行双下肢CTA单部位常规扫描,计算各组的辐射剂量。在A组与B组头颈部图像上测量颈总动脉、颈内动脉C1段和C4段、大脑中动脉M1段及基底动脉9个部位的CT值,计算头颈部CTA图像的对比噪声比(CNR);在A组与C组双下肢CTA图像上测量腹主动脉末端、髂总动脉、髂外动脉、股总动脉、股浅动脉、腘动脉和胫腓干13各部位的CT值并计算双下肢CTA图像的对比噪声比(CNR),并对头颈部及双下肢动脉CTA图像质量进行主观评价。采用Shapiro-WilkNormal分布检验和独立样本t检验比较各组图像的主观评分及辐射剂量。结果:A组与B组头颈部9个部位的CT值差异无统计学意义(P>0.05),且两组之间的CNR和图像质量比较无差异。A组和C组双下肢13个部位的CT值差异无统计学意义(P>0.05),且两组之间的CNR和图像质量比较无差异。A组辐射剂量CTDIvol(8.33±5.05)mGy,DLP(1403.41±877.56)mGy·cm;B组CTDIvol(10.81±4.75)mGy,DLP(422.78±194.69)mGy·cm;C组CTDIvol(8.38±4.74)mGy,DLP(872.22±538.04)mGy·cm。A、B、C 3组的CTDIvol差异无统计学意义,A组的DLP高于B、C两组,A组与B组的DLP差异有统计学意义(P<0.05),A组与C组DLP差异无统计学意义(P=0.11)。结论:使用Revolution CT在头颈、主动脉及双下肢CTA一站式成像保证图像质量的同时,和常规部位检查相比,能减少对比剂用量和辐射剂量,简化临床工作流程。
Objective:To evaluate the utility of revolution CT angiography for one-stop CT angiography(CTA)of craniocervical,aorta and lower extremity arteries.Methods:Totally 47 patients who underwent revolution CTA at Shenzhen Hospital were retrospectively divided into three groups,14 cases in group A,combined scanning of craniocervical,aorta and lower extremity arteries,18 cases in group B,single-site scanning of craniocervical artery,15 cases in group C,single-site scanning of lower extremity arteries.The radiation dose was calculated for each group.The CT values in uounsfield units(HU)of the common carotid artery,C1 segment and C4 segment of the internal carotid artery,M1 segment of the middle cerebral artery and the basilar artery were measured on the CTA images of craniocervical artery in patients in group A and group B.The CT values of the distal aorta,common iliac artery,external iliac artery,common femoral artery,superficial femoral artery,popliteal artery and artery of the calf were also measured on the CTA images of the lower extremity artery in group A and group C.The contrast-to-noise ratio(CNR)was calculated and compared among the groups.Subjective scores of the image quality and radiation doses were performed based on axial and 3D reconstruction images by Shapiro-Wilk Normal distribution test and independent t test.Results:There was no statistical difference in CT values,CNR and image quality of craniocervical artery CTA between group A and group B(P>0.05),and of lower extremity artery CTA images between group A and group C(P>0.05).The mean radiation dose was(8.33±5.05)mGy of CTDlvol and(1403.41±877.56)mGy·cm of DLP in group A;(10.81±4.75)mGy of CTDlvol and(422.78±194.69)mGy·cm of DLP in group B;(8.38±4.74)mGy of CTDlvol and(872.22±538.04)mGy·cm of DLP in group C,respectively.There was no significant difference in CTDlvol among the three groups.The DLP of group A was higher than that of group B and C.DLP was significant difference between group A and group B(P<0.05),whereas there was no significant d
作者
邓灵波
朱熠
袁知东
成官迅
DENG Ling-bo;ZHU Yi;YUAN Zhi-dong(Radiology Department of Beijing University Shenzhen Hospital,Guangdong Shenzhen 518036,China)
出处
《放射学实践》
北大核心
2020年第6期796-800,共5页
Radiologic Practice
关键词
头颈
动脉
主动脉
下肢
计算机体层摄影血管造影术
Head and neck
Arteries
Aorta
Lower extremity
Computed tomography angiography
