基于图像重建的CT三维重建提升腹部增强扫描图像质量的价值

The Value of CT Three-dimensional Imaging Based on Image Reconstruction to Improve the Image Quality of Abdominal Enhanced Scan

目的:探讨基于图像重建的电子计算机断层扫描仪器(Computed Tomography,CT)三维成像提升腹部增强扫描图像质量的价值。方法:2019年11月到2020年10月选择在本院进行腹部CT增强扫描的患者76例作为研究对象,采用电脑随机数字法将研究对象分为对照组和重建组各38例,对照组给予常规扫描成像,重建组给予基于自适应统计迭代重建(adaptive statistical iterative reconstruction,ASIR)的CT三维成像,记录两组成像质量与噪声情况。结果:两名医师对重建组的图像主观质量评分都高于对照组(P<0.05)。重建组的图像相对细腻柔和,能清晰显示图像细小血管断面,末梢血管显示良好,血管壁光滑柔和。重建组的动脉期、门静脉期、平衡期的肝脏CT值高于对照组(P<0.05),动脉期、门静脉期、平衡期的肝脏、胰腺对比噪声比(contrast to noise ratio,CNR)值低于对照组(P<0.05)。重建组的容积剂量指数(volume CT dose index,CTDIvol)和剂量长度乘积(Dose-Length product,DLP)、有效剂量(effective dose,ED)值都低于对照组(P<0.05)。结论:基于图像重建的CT三维成像能提升腹部增强扫描主客观图像质量,降低图像噪声,更利于腹部疾病的显示,从而提高正确诊断率。

Objective:To explore the value of Computed Tomography(CT) three-dimensional imaging based on image reconstruction to improve the image quality of abdominal enhanced scan.Methods:From November 2019 to October 2020,76 cases of patients who underwent enhanced abdominal CT scans in our hospital were selected as the research objects.All the cases were divided into the control group and reconstruction group with 38 cases in each group.And the control group were given routine scanning imaging,the reconstruction group were given CT three-dimensional imaging based on adaptive statistical iterative reconstruction(ASIR),and the imaging quality and noise of the two groups were recorded.Results:The subjective quality scores of the two doctors in the reconstruction group were higher than those in the control group(P<0.05).The images of the reconstruction group were relatively delicate and soft,and could clearly show the sections of small blood vessels,the peripheral blood vessels were well displayed,and the blood vessel walls were smooth and soft.The CT values of the liver and pancreas in the arterial,portal and balance phase of the reconstruction group were higher than those of the control group(P<0.05),and the contrast to noise ratio(CNR) values of the liver and pancreas in the arterial,portal and balance phases were lower than those of the control group(P<0.05).The volume CT dose index(CTDIvol),Dose-Length product(DLP)and effective dose(ED) values of the reconstruction group were lower than those of the control group(P<0.05).Conclusion:CT three-dimensional imaging based on image reconstruction can improve the subjective and objective image quality of abdominal enhanced scanning,reduce image noise,and is more conducive to the display of abdominal diseases,thereby increase the correct diagnosis rate.