Comparison of Application Value of Revolution CT Combined with Different Weights of ASIR-V in Chest Pain Triad Imaging
Objective To investigate the application value of Revolution CT combined with multi-model iterative reconstruction technique with different weights(ASIR-V)in chest pain triad(TRO)imaging.Methods 90 patients with chest pain admitted to our hospital from August 2022 to March 2023 were selected for study.After admission,TRO-Revolution CT plain scan was performed.They were divided into filter back projection(FBP)group and ASIR-V group with 45 cases respectively according to random number table method.FBP group was reconstructed by FBP technology,and ASIR-V group was reconstructed by ASIR-V technology with different weights(10％,30％,50％,70％,90％).The radiation dose length product(DLP)and effective dose(ED)of the two groups were recorded.The mean CT values,noise values,signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of coronary arteries,ascending aorta,descending aorta and pulmonary trunk under different recombination methods and different weights were compared.Subjective image quality scores were performed by two experienced imaging doctors.Results The DLP and ED of ASIR-V group were lower than those of FBP group(P＜0.05).The noise value of ASIR-V was lower than that of FBP,while SNR,CNR and subjective image quality score of ASIR-V were higher than that of FBP(P＜0.05).The noise values of 50％,70％and 90％of ASIR-V weight were lower than those of 10％and 30％of ASIR-V weight(P＜0.05).SNR and CNR with ASIR-V weight of 50％,70％and 90％were higher than those with 10％and 30％SNR with ASIR-V weight(P＜0.05).The subjective scores of 50％and 70％of ASIR-V weight were higher than those of 10％,30％and 90％of ASIR-V weight(P＜0.05).Condlusion Revolution CT combined with ASIR-V technology can reduce the radiation dose.When the weight of ASIR-V is 50％and 70％,the vascular cavity and anatomical structure can be displayed well.The vascular cavity noise value is low,and the SNR and CNR are high,which can meet the diagnostic requirements.
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