首页|自由呼吸状态与屏气状态行肺部CT检查肺结节在辐射剂量与图像质量影响的对比

自由呼吸状态与屏气状态行肺部CT检查肺结节在辐射剂量与图像质量影响的对比

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目的:自由呼吸状态与屏气状态行肺部CT检查肺结节在辐射剂量与图像质量影响的对比.方法:选取 2022年 6 月至2023年 10 月在我院需行肺部CT扫描的肺结节患者 80 例作为研究对象,按照简单随机分组法分为对照组(屏气状态行肺部CT检查,40 例)和观察组(自由呼吸状态行肺部CT检查,40 例).观察并比较两组患者有效辐射剂量(ED)、剂量长度乘积(DLP)、容积CT剂量指数(CTDI)、图像质量客观评价及主观评分.结果:两组患者DLP、CTDI经比较,无统计学差异(P>0.05),观察组ED低于对照组,具有统计学差异(P<0.05);观察组的SNR值、肺实质CT值高于对照组,具有统计学差异(P<0.05);观察组肺部图像主观评分均高于对照组,具有统计学差异(P<0.05);观察组中重度伪影发生率 7.50%(3/40),低于对照组 30.00%(12/40),具有统计学差异(χ2=6.646,P=0.010).结论:肺结节患者在自由呼吸状态下行肺部CT检查在图像质量及扫描有效辐射量方面优于于屏气状态行肺部CT检查,因此,对肺结节患者行肺部CT检查时可采取自由呼吸提高检查效率.
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

吕枚桥、罗华林、黄静

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赣南医学院第一附属医院公共卫生科,江西 赣州 341000

赣南医学院第一附属医院医务科,江西 赣州 341000

赣南医学院第一附属医院医学影像科,江西 赣州 341000

图像质量 辐射剂量 肺结节 肺部CT检查 屏气状态 自由呼吸状态

2024

四川生理科学杂志
四川省生理科学会

四川生理科学杂志

影响因子:0.575
ISSN:1671-3885
年,卷(期):2024.46(10)