Effect Analysis of Adaptive Statistical Iterative Reconstruction (ASIR) on CT Image Quality of Low Dose CT Examination of Urinary Calculus
Objective To analyze the effect of ASIR on CT image quality of low-dose CT examination of urinary calculus,and provide reference for more accurate diagnosis of urinary calculus in future.Methods The paper chose 180 patients with urinary calculus with twice examination in our hospital from June 2021 to June 2023.Based on low dose CT scans,1.25mm thin-layer reconstruction was carried out with 80％ grade ASIR,and the examination results were used as observation group.Based on routine dose CT scans,1.25mm thin-layer reconstruction was carried out with filtering backprojection (FBP),and the examination results were used as the control group.CT image quality was compared between two groups.Results 254 stones were detected in the observation group,surgery confirmed the diagnostic sensitivity was 98.07％.259 stones were detected in the control group,surgery confirmed the diagnostic sensitivity was 100.00％.There was no statistically significant difference in diagnostic sensitivity between two groups (P>0.05).There was no statistically significant difference in location of stones between two groups (P>0.05).Surgery confirmed stone diameter was 1.0～40 mm in the observation group,that was 1.0～41mm in the control group.There was no statistically significant difference in stone diameter between two groups (P>0.05).There was no statistically significant difference in CT image quality scores and diagnostic reliability scores between two groups (P>0.05).Conclusion ASIR can improve quality of low-dose CT images and enhance accuracy of examinations,which is a kind of excellent cutting-edge technology.
万方数据
维普
