Impact of low-dose scanning on the image quality of head and neck CT angiography
JIANG Mengyue
ZHU Yun
Abstract：Objective To investigate the effect of low-dose scanning on the image quality of head and neck computed tomography angiography(CTA).Methods Sixty patients who underwent head and neck CTA at the First Affiliated Hospital of Bengbu Medical University from February 2022 to January 2025 were selected as the research subjects.The patients were randomly divided into a study group and a control group,with 30 cases in each group.The study group underwent dual low-dose scanning(tube current:80 mA,contrast agent:40 mL).The control group underwent conventional-dose scanning(tube current:100 mA,contrast agent:50 mL).All scans were performed in the standard position using a standard scanning protocol,and a dual-barrel high-pressure injection system was used for contrast agent bolus injection.After scanning,the data of both groups need to undergo multimodal three-dimensional post-processing.Statistical analysis was performed to compare the differences in noise,radiation dose,and image quality of various parts between the two groups,so as to analyze the effect of low-dose scanning on the image quality of head and neck CTA.Results There were no statistically significant differences in the signal-to-noise ratio and contrast-to-noise ratio of various parts(aortic arch,left common carotid artery,right common carotid artery,left internal carotid artery,right internal carotid artery,left middle cerebral artery,right middle cerebral artery)between the two groups(P>0.05).The volume CT dose index,dose-length product,effective dose,and iodine load in the study group were all lower than those in the control group(P<0.05).There was no statistically significant difference in the image quality score between the two groups(P>0.05).Conclusion Compared with conventional-dose head and neck CTA scanning,low-dose head and neck CTA scanning shows no significant difference in image quality.And low-dose head and neck CTA scanning can reduce the patient's radiation dose.
Keywords：low-dose scanninghead and neck CT angiographyimage quality
Publication Date：2025-12-20
Online Publishing Date：2026-01-07(First online date of this platform, not the publication date of the document)
Pages：5( 1521-1525 )