目的:探讨肺部低剂量螺旋CT的最佳放射剂量。方法:选取2016年1月-2016年5月于我院进行健康体格检查的人群共80名,将80名研究对象按照检查编号,随机分为两组,观察组和对照组各40例,对照组人群在肺部低剂量螺旋CT检查时给予常规的80m As...目的:探讨肺部低剂量螺旋CT的最佳放射剂量。方法:选取2016年1月-2016年5月于我院进行健康体格检查的人群共80名,将80名研究对象按照检查编号,随机分为两组,观察组和对照组各40例,对照组人群在肺部低剂量螺旋CT检查时给予常规的80m As的放射剂量;观察组人群在肺部低剂量螺旋CT检查时给予20 m As的较低放射剂量,两组人群在接受检查后,比较两组人群的肺部检查扫描的效果。结果:观察组40例人群在接受20 m As的较低放射剂量的肺部低剂量螺旋CT检查后,检查总有效率为92.5%,检查放射总损害率为2.5%;对照组人群检查总有效率为72.5%,检查放射总损害率为10%;观察组人群检查总有效率要明显高于对照组人群,检查放射总损害率明显低于对照组人群,组间检查治疗效果比较具有明显差异,P<0.05。结论:临床上在进行肺部低剂量螺旋CT检查时最佳放射剂量为20 m As,应用此剂量可以取得较高的检查总有效率,产生程度最低的机体放射损害,值得在临床上大力推广。展开更多
The dose distribution in the lung is inhomogeneous. The dose to the hasal cell layer of trachea and main bronchi is much higher than the dose to total lung both for rabbits at different ages and for different animals....The dose distribution in the lung is inhomogeneous. The dose to the hasal cell layer of trachea and main bronchi is much higher than the dose to total lung both for rabbits at different ages and for different animals. A maximum value of the dose to lung tissue for rabbits at ages of 20-40d is observed. The dose decreases with increasing body weight. The relationship between the dose and body weight can be described by a power function. The dose to total lung increases exponentially with the minute breathing volume per unit of lung weight.展开更多
文摘目的:探讨肺部低剂量螺旋CT的最佳放射剂量。方法:选取2016年1月-2016年5月于我院进行健康体格检查的人群共80名,将80名研究对象按照检查编号,随机分为两组,观察组和对照组各40例,对照组人群在肺部低剂量螺旋CT检查时给予常规的80m As的放射剂量;观察组人群在肺部低剂量螺旋CT检查时给予20 m As的较低放射剂量,两组人群在接受检查后,比较两组人群的肺部检查扫描的效果。结果:观察组40例人群在接受20 m As的较低放射剂量的肺部低剂量螺旋CT检查后,检查总有效率为92.5%,检查放射总损害率为2.5%;对照组人群检查总有效率为72.5%,检查放射总损害率为10%;观察组人群检查总有效率要明显高于对照组人群,检查放射总损害率明显低于对照组人群,组间检查治疗效果比较具有明显差异,P<0.05。结论:临床上在进行肺部低剂量螺旋CT检查时最佳放射剂量为20 m As,应用此剂量可以取得较高的检查总有效率,产生程度最低的机体放射损害,值得在临床上大力推广。
文摘The dose distribution in the lung is inhomogeneous. The dose to the hasal cell layer of trachea and main bronchi is much higher than the dose to total lung both for rabbits at different ages and for different animals. A maximum value of the dose to lung tissue for rabbits at ages of 20-40d is observed. The dose decreases with increasing body weight. The relationship between the dose and body weight can be described by a power function. The dose to total lung increases exponentially with the minute breathing volume per unit of lung weight.
