CT angiography of head-and-neck acquired with low tube voltage combined with low concentration contrast media using 64-de-tector CT
HUANG Yu-xin
ZHONG Zhu
ZHONG Xi-sheng
QIN Ce
HUANG Rui-xue
HUANG Hai-tao
HE Hui-hua
Abstract：Objective The purpose of this study is to evaluate the image quality and the clinical value of low tube voltage and low concentration contrst media CT angiography protocol in head and neck arteries .Methods Seventy patients with clinically suspected head and neck vascular disease underwent CTA procedure were divided into group A and B ,with 35 patients in each group .The head and neck CTA was performed using 100 kV with Iodixanol 270 in group A ,120 kV with Iohexol 350 in group B .The CM volume of 0 .9 ml/kg was injected at a flow rate of 5 ml/s .Bolus tracking of AA was used to evaluate the circulation time and trigger the scan .Image quality was assessed by using a three-point grading scale . The Iodine intake ,contrast-to-noise ratio (CNR) ,and the effective dose (ED) were compared between the two groups . Results Carotid atherosclerosis was found in 54 patients (29 in group A ,25 in group B) .All the head and neck artery branches were clearly displayed in all the cases .Enhancement homogeneity and CNR were good with both contrast agents , with no statistically significant difference between them ( P>0 .05) .The ED and iodine intake was lower in group A than group B (1 .18 ± 0 .08) mSV vs (1 .58 ± 0 .14) mSv ,P<0 .05;(15 .87 ± 4 .10) gI vs (19 .35 ± 5 .14) gI ,P<0 .05) ,with statistical difference .Conclusion Head-and-neck CTA with 100 kV and iodixanol 270 can provide same quality images as using 100 kV and Iohexol 350 ,and reduce the ED and iodine intake greatly .
Keywords：TomographyX-ray computedRadiation doselow iodine
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1692-1695 )