Comparison of Accuracy of Double Low-dose and Conventional Multi-slice Spiral CT in Colorectal Cancer Invasionand Mesenteric Vascular Distribution
Objective:To compare the accuracy of double low dose and conventional dose of MSCT in colon cancer invasion and mesenteric vascular distribution.Method:Sixty-nine colon cancer patients admitted to the hospital from June 2021 to June 2022 were divided into the conventional group(n=35,conventional-dose MSCT)and the double-low group(n=34,double-low-dose MSCT)according to the randomized numerical table method.The image quality evaluations[noise,CT value,computed signal-to-noise ratio(SNR)and contrast signal-to-noise ratio(CNR)and subjective evaluation scores of the physicians],radiation dose[dose-length product(DLP),volumetric CT dose index(CTDIvol),effective dose(ED)]and tumor invasion,mesenteric vascular distribution accuracy were compared between the group.Result:The noise and CT values of the double-low group were significantly higher than those of the conventional group(P<0.05).However,the comparison of SNR and CNR values were significantly lower than those of the conventional group(P<0.05).There was no significant difference in the subjective scores of the pictures of the two groups(P>0.05).the DLP,CTDIvol,and ED of the double-low group were significantly lower than those of the conventional group(P<0.05).there was no significant difference in the accuracy rate of detecting tumor invasion and mesenteric vascular distribution between the conventional group and the double-low group in rectal cancer.There is no significant difference in accuracy between conventional group and double-low group(P>0.05).Conclusion:Double-low-dose MSCT can significantly reduce radiation exposure,accurately display colon cancer tumor invasion and mesenteric vascular distribution,meet the requirements of diagnostic imaging,and be safer,so it has a better value of application.
Multilayer spiral electron computed tomographyColon cancerTumor invasionMesenteric vascular distribution
万方数据
维普
