【摘要】 目的 探究四维降噪与运动矫正技术对下肢4D-CTA图像质量的影响。方法 收集在西门子双源CT进行下肢动脉4D-CTA扫描的患者31例，扫描范围涵盖膝下三支动脉。将图像输入Syngo Via VB40软件，获得四维降噪和运动矫正处理前和处理后的4D-CTA最大密度投影图和动态电影图。对处理前后的图像进行Likert视觉评分(1-4分，1分为最差，4分为最佳)，并进行组间比较。结果 处理前动态电影图像Likert视觉评分3分占54.8%(17/31),4分占16.1%(5/31)，处理后3分占25.8%(8/31),4分占64.5%(20/31),四维降噪和运动矫正处理提高了下肢动脉4D-CTA图像的Likert评分，且差异具有统计学意义(P<0.01)。结论 四维降噪与运动矫正可以提高下肢动脉4D-CTA的图像质量，对膝下三支动脉的动态成像具有优化作用。更多还原

【Abstract】 Objective To investigate the impact of four-dimensional noise reduction and motion correction techniques on the image quality of lower extremity 4D-CTA.Methods A total of 31 patients undergoing lower extremity arterial 4D-CTA scans with a Siemens dual-source CT were enrolled.The scan range covered the three arteries below the knee.The images were processed using the Syngo Via VB40software to obtain the maximum density projection images and dynamic movie images before and after the application of four-dimensional noise reduction and motion correction.The image quality was evaluated using Likert visual scores(1-4,with 1 being the worst and 4 being the best) for both pre-and post-processed images,and comparisons between the groups were conducted.Results Before processing,the Likert visual scores for dynamic movie images were 3 in 54.8%(17/31) of cases and 4in 16.1%(5/31) of cases.After processing,the scores were 3 in 25.8%(8/31) and 4 in 64.5%(20/31)of cases.The application of four-dimensional noise reduction and motion correction significantly improved the Likert scores of the lower extremity arterial 4D-CTA images,with the difference being statistically significant(P<0.01).Conclusion Four-dimensional noise reduction and motion correction techniques significantly enhance the image quality of lower extremity arterial 4D-CTA,particularly improving the dynamic imaging of the three a rteries below the knee.更多还原