Objective To explore the value of dual localization image combined with fast assisted scanning technology(FAST)to reduce the radiation dose of chest CT.Methods 160 cases of outpatients who underwent chest CT examination from December 2020 to May 2021 were selected and divided into observation group and control group using random number table method,with 80 cases in each group.FAST technology was used in both groups,with single localization image in the control group and the double localization image in the observation group.The quality of CT images,signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR),volumetric CT dose index(CTDIvol),dose-length product(DLP),effective dose(ED),and body-specific dose estimation(SSDE)were compared between the two groups.Results The differences in image quality scores,SNR and CNR values between the observation and control groups were not statistically significant(P>0.05).Comparison of CTDIvol,DLP,ED and SSDE between the two groups showed statistically significant differences(P<0.001).Conclusion The use of dual-localization image combined with FAST technology can significantly reduce the radiation dose to patients compared with conventional single-localization image chest CT examination,while the image quality can meet the clinical diagnostic requirements.
万方数据
维普
