The clinical application of helical CT scanning combined with the technology of iDose 4 in the pulmonary nodules / 实用放射学杂志

ABSTRACT

Objective To investigate the value on clinical application of helical CT scanning combined with the technology of iDose4 in the pulmonary nodules.Methods 90 cases with pulmonary nodules underwent CT examination including the regular dose and low dose.The regular dose was performed with following parameters:tube voltage 120 kV,effective tube current of 150 mAs.The low dose was performed with following parameters:tube voltage 120 kV,effective tube current of 30 mAs.The other scanning requirements were as same as the regular dose.The volume CT dose index(CTDIvol)and dose-length product(DLP)were recorded.The all images were reconstructed by the technology of iDose4 of Level 1-7.Two radiologists blinded to the scan conditions independently reviewed all data sets for image quality.The number and the morphological features including the location,size,margin,lobulation sign were recorded.The clinical application effect were assessed.Results 108 pulmonary nodules were revealed in 90 cases with the regular dose.101 pulmonary nodules were revealed in 90 cases with the low dose.No statistical significance differences were seen between the regular dose and the low dose(P>0.05).No statistical significance differences were seen in the morphological features between the regular dose and the low dose(P>0.05).The radiation dose of the low dose reduced 75.8% with the regular dose,the difference was statistically(P<0.003).Conclusion There is no obvious differences between the regular dose and the low dose of helical CT scanning combined with the technology of iDose4 in the pulmonary nodules.The low dose of helical CT scanning combined with the technology of iDose4 can reduce the radiation dose.