Lung CT was performed to examine the effects of radiation dose and image quality of pulmonary nodules in the free breathing state and the breath-holding state
Objective:Lung CT was performed to examine the effects of radiation dose and image quality of pulmonary nodules in the free breathing state and the breath-holding state.Methods:A total of 80 patients with pulmonary nodules who underwent lung CT scan in our hospital from July 2023 to December 2023 were selected as the study subjects,and they were divided into control group(40 cases of lung CT examination in breath-holding state)and observation group(40 cases of lung CT examination in free breathing state)according to the simple random grouping method.The effective radiation dose(ED),dose-length product(DLP),volumetric CT dose index(CTDI),objective evaluation of image quality and subjective score were observed and compared between the two groups.Results:There was no statistical difference in DLP and CTDI between the two groups(P>0.05),the ED in the observation group was lower than that in the control group,with a statistical difference(P<0.05),the SNR value and lung parenchymal CT value in the observation group were higher than those in the control group,with a statistical difference(P<0.05),the subjective score of lung images in the observation group was higher than that in the control group,with a statistical difference(P<0.05),and the incidence of severe artifacts in the observation group was 7.50%(3/40),which was lower than that in the control group(25.00%)(10/40),with statistical difference(χ2=4.501,P=0.034).Conclusion:Lung CT examination in patients with pulmonary nodules in the state of free breathing is better than that of lung CT examination in the breath-holding state in terms of image quality and effective radiation amount of scanning,so free breathing can be used to improve the efficiency of lung CT examination in patients with pulmonary nodules.
Image qualityRadiation dosePulmonary nodulesCT scan of the lungsBreath-holding stateFree breathing state