Objective To explore the feasibility of low-dose CT technology to realize mixed reality imaging of thoracoab-dominal aorta.Methods Sixty-seven patients with mixed reality imaging of thoracoabdominal aorta were prospectively col-lected and randomly divided into two groups:group A(conventional dose mixed reality group of thoracoabdominal aorta,n=32)and group B(low dose mixed reality group of thoracoabdominal aorta,n=35).Group A uses 120 kVp and Group B uses 80 kVp.The CT data generated by the two groups were imported into the three-dimensional(3D)modeling software for 3D modeling,and the mixed reality results were released.The demographic characteristics of the two groups of patients were compared by independent sample t test.The subjective evaluation of mixed reality quality adopts Mann-Whitney U test,and the evaluator uses Kappa analysis to compare the consistency.Results There was no significant difference in age,height,weight,sex and body mass index(BMI)between the two groups(all P＞0.05).Compared with group A,the mixed reality radiation dose of thoracoabdominal aorta generated by group B is reduced by about 59％.There was no signifi-cant difference in the mixed reality quality of thoracoabdominal aorta generated by the two protocols(P＞0.05).The sub-jective consistency of the evaluators were good,with Kappa values ranging from 0.631 to 0.829.Conclusion Low-dose CT technology can be effectively applied to the thoracoabdominal aorta mixed reality,ensuring the quality of the thoracoab-dominal aorta mixed reality,while significantly reducing the radiation dose received by patients,and providing guarantee for the wide promotion of the thoracoabdominal aorta mixed reality technology.
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