中国医学装备2024，Vol.21Issue(1)：59-62,4.DOI:10.3969/j.issn.1672-8270.2024.01.012
前置呼吸模式在320排CT肺动脉双低成像的研究
Study on the clinical application of pre-breathing mode in double-low imaging of 320-slices CT for pulmonary artery
摘要
Abstract
Objective:To explore the clinical application value of pre-breathing mode in double-low imaging of 320-slices computed tomography(CT)for pulmonary artery.Methods:A total of 100 patients who underwent CT pulmonary angiography(CTPA)for suspected pulmonary embolism(PE)in Liuzhou People's Hospital from July 2021 to September 2022 were prospectively selected as the research subjects and they were randomly divided into observation group and control group,with 50 cases in each group.The patients of the control group adopted conventional breathing mode(the breathing password was activated after reaching the threshold,and the scan was triggered after 6 s),while the patients of the observation group adopted the pre-breathing mode(the breathing password was activated after 1 or 2 seconds,and the scan was triggered after reaching the threshold).Both two groups adopted double low-technique scan of 320 slices CT.The differences in delay time,radiation dose,the points of subjective and objective image quality,and other indicators were compared between the two groups.Results:The volume CT dose index(CTDIvol),dose length product(DLP),effective dose(ED)and delay time of the observation group were significantly lower than those of the control group(t=76.230,30.225,12.282,7.088,P<0.05),respectively.The comparison of the subjective points of image qualities between the two groups indicated that there were 25 cases with 5 points,23 cases with 4 points and 2 cases with 3 points in the observation group,and there were 21 cases with 5 points,26 cases with 4 points and 3 cases with 3 points in the control group.There was no significant difference in the averagely subjective points of image qualities between two groups(P>0.05).The signal-to-noise ratio(SNR)and signal to noise ratio(CNR)of the observation group were significantly lower than those of the control group,and the noise level(SD)of the observation group was significantly higher than that of the control group(t=25.441,23.886、11.426,P<0.05),respectively.The CT values of the artery trunk of right pulmonary,artery branch of right pulmonary,artery trunk of left pulmonary and artery branch of left pulmonary in the observation group were significantly higher than those in the control group(t=2.256,2.225,2.042,2.277,P<0.05),respectively.Conclusion:The pre-breathing mode can effectively improve CTPA image quality,and reduce radiation dose and the dosage of contrast agent,which clinical application effect is significant.It is worth learning.关键词
前置呼吸模式/CT肺动脉双低成像/肺动脉栓塞(PE)/CT肺动脉造影(CTPA)Key words
Pre-breathing mode/Double-low imaging of CT for pulmonary artery/Pulmonary embolism(PE)/Computed tomography pulmonary angiography(CTPA)分类
医药卫生引用本文复制引用
李孝飞,覃庆婷,廖玉荣,杨利专,杨鹏,林炜南,冼昌源,曾晨茜,曹治婷..前置呼吸模式在320排CT肺动脉双低成像的研究[J].中国医学装备,2024,21(1):59-62,4.基金项目
广西壮族自治区卫生健康委员会自筹经费科研课题(Z20210006) A Self-funded Research Project of Health Commission of Guangxi Zhuang Autonomous Region(Z20210006) （Z20210006）
