| 胸部低剂量计算机X线摄影的探讨 |
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| 引用本文： | 张金声,纪盛章,曹立荣,李建伟,李平. 胸部低剂量计算机X线摄影的探讨[J]. 实用放射学杂志, 2008, 24(12): 1691-1693 |
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| 作者姓名： | 张金声 纪盛章 曹立荣 李建伟 李平 |
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| 作者单位： | 天津市第四中心医院放射科,天津,300140 |
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| 摘 要： | 目的 探寻胸部低剂量计算机X线摄影方法.方法 共75例行胸部计算机摄影检查,kVp值均按常规设定.以降低mAs值的方法分组,常规mAs值为日常组,减低一档mAs值的作为减剂量组,曝光剂量再降低一档mAs值的作为低剂量组,每组25例,计算每组曝光量的平均值,观察曝光量降低情况.每张胸部CR片选取6个区进行密度测量和统计学两两比较的t检验,评价低剂量曝光的图像质量.结果 曝光量(E)为:日常组为1.8、减剂量组为1.4、低剂量组为0.9;低剂量组较日常组曝光量降低50%;经统计学比较,3组不同曝光量6个点图像密度无显著差异(t检验,P>0.05).结论 胸部低剂量计算机X线摄影在临床应用具有一定的价值.
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| 关 键 词： | 计算机X线摄影 胸部 低剂量X线检查 |
Investigation on the Chest Low-dose Computed Radiography |
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| ZHANG Jin-sheng,JI Sheng-zhang,Cao Li-rong,Li Jian-wei,Li Ping. Investigation on the Chest Low-dose Computed Radiography[J]. Journal of Practical Radiology, 2008, 24(12): 1691-1693 |
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| Authors: | ZHANG Jin-sheng JI Sheng-zhang Cao Li-rong Li Jian-wei Li Ping |
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| Affiliation: | ZHANG Jin-sheng,JI Sheng-zhang,Cao Li-rong,Li Jian-wei,Li Ping(Department of Radiology,Tianjin Fourth Central Hospital,Tianjin 300140,China) |
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| Abstract: | Objective To study the chest low-dose computed radiography technique.Methods 75 cases underwent chest computed radiography(CR),kVp was setup as conventional vlaue in all cases.75 cases were divided into three groups(25 cases in each group) according to different mAs.mAs was defined as routine-group(group A),low in one grade(group B) and two-grades(group C or low-dose group).The average expose value of each group was calculated.Then,6 areas were chosen out on CR film to measured the dense values and analysed... |
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| Keywords: | computed radiography chest low-dose radiography |
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