儿童胸部DR摄影参数优化的研究

发布时间：2018-05-26 12:07

本文选题：数字化X线摄影 + 儿童胸部　；参考：《新疆医科大学》2012年硕士论文

【摘要】：目的：比较四组儿童胸部数字化成像（DR）摄影的辐射剂量和图像质量，优化儿童管电压可行性。方法：该前瞻性研究被新疆大学医学伦理审查委员会批准，由儿童本人或监护人或家长签订知情同意书。把0至14岁4500例儿童被随机分成低千伏(A)、中等千伏(B)、次高千伏组(C)及固定高千伏组（对照）进行数字化成像（DR）摄影。纳入研究4433例儿童胸部正位图像；排除67例儿童胸部正位图像，辐射剂量测量用剂量面积乘积（DAP）。五位放射科诊断医生独立盲法在工作站上用可视化分级分析评分（VGAS）评价图像质量。DAP和VGAS均值使用单因素方差分析进行统计学处理。结果：C组的DAP均值与低千伏组和中等千伏值的DAP均值比较有统计学差异(P＜0.05)；C组的DAP均值低于对照组的DAP均值(P＜0.05)，C组的辐射剂量比对照组辐射剂量低了18.75%；B值的DAP均值与对照组的DAP均值比较没有统计学差异(P=0.976)；A组的DAP均值大于B值的DAP均值（P=0.000）。对照组的VGAS均值与A组、B组和C组的VGAS均值比较统计学有显着差异（P=0.000、P=0.000和P=0.000）；B组与A组的VGAS均值比较没统计学没有差异(P=0.334)；C组的图像质量略差于B组和A组的图像质量，他们之间的VGAS均值有统计学差异(P=0.008、P=0.049)。结论：C组的管电压得到的辐射剂量和图像质量是我们可以接受的结果,并且我们建议应用VGAS评价图像质量。
[Abstract]:Aim: to compare the radiation dose and image quality of four groups of children with digital chest imaging (DRR), and to optimize the feasibility of tube voltage. Methods: the prospective study was approved by the Medical Ethics Review Committee of Xinjiang University and informed consent was signed by the child, guardian or parent. 4500 children aged 0 to 14 years were randomly divided into three groups: low KV, medium KV, subhigh KV group and fixed KV group (control group). The chest orthographic images of 4433 children and 67 children were excluded, and the dose area product was used to measure the radiation dose. An independent blind method for five radiologists was used to evaluate the image quality by visual grading analysis (VGASA) on a workstation. The mean value of VGAS was evaluated by univariate ANOVA (ANOVA). Results the mean value of DAP in group C was significantly lower than that in group C (P < 0.05) and the mean value of DAP in group C was lower than that in group C (P < 0.05). The mean value of DAP of radiation dose in group C was 18.75g / L lower than that in group C (P < 0.05). There was no statistical difference in the mean value of DAP in the control group. The DAP mean of group A was greater than that of group B (P < 0. 000). There were significant differences between the VGAS mean of the control group and the VGAS mean of group A and group C. There was no significant difference in the mean value of VGAS between group B and group A. There was no statistical difference in the mean value of VGAS between group B and group A the image quality of group C was slightly worse than that of group B and group A. There was a statistically significant difference in the VGAS mean between them, P0. 008 and 0. 049. Conclusion the radiation dose and image quality obtained from the tube voltage of group C are acceptable to us, and we suggest that VGAS be used to evaluate the image quality.
【学位授予单位】：新疆医科大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R816.92

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