Clinical value of iterative model reconstruction combined with low-tube-voltage imaging in evaluating mesenteric artery

MENG Yuanyi; QIN Mingan; YU Xiaoping; XIA Zhenyuan; MO Xinxin; LU Bingfeng

doi:10.3969/j.issn.1674-3806.2024.11.15

Abstract：Objective To explore the clinical value of iterative model reconstruction(IMR) combined with low-tube-voltage imaging in evaluating mesenteric artery.Methods Sixty patients undergoing total abdominal computed tomography( CT) arterial imaging( CTA) examination in the Second Affiliated Hospital of Guangxi Medical University from January 2020 to December 2022 were recruited and divided into control group(n=30) and trial group(n=30) by lottery method.The imaging of the control group was reconstructed by using 120 kV tube voltage combined with iDose4 .The imaging of the trial group was reconstructed by using 100 kV tube voltage combined with IMR.The CT value,noise value(standard deviation,SD),signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR) of the examined images,and subjective scores of the image quality and the evaluation indicators for radiation dose[volume CT dose index(CTDIVOL),dose-length product( DLP) and effective radiation dose( ED)]were compared between the two groups.The subjective scores of the image quality were performed independently by two physicians.Intraclass correlation coeficient(ICC) consistency test was used to evaluate the consistency of the results.Results The noise value(SD) of the superior mesenteric artery and the noise value( SD) of the inferior mesenteric artery in the trial group were lower than those in the control group,and the CT value,SNR and CNR in the trial group were higher than those in the control group,and the differences were statistically significant(P＜0.05).The results of ICC consistency test showed that the image quality scores performed independently by the two physicians in the same group were well consistent(P＜0.05).The ultimate subjective scores of image quality in the trial group were significantly higher than those in the control group(P＜0.05).The levels of CTDIVOL,DLP and ED in the trial group were lower than those in the control group,and the differences were statistically significant(P＜0.05).Conclusion IMR combined with low-tube-voltage imaging can improve the image quality of mesenteric artery and reduce ED in the patients,which is worthy of clinical application.