摘要
为了探讨图像噪声对伽玛刀剂量学参数检测结果的影响,依据GBZ 168-2005《X、γ射线头部立体定向外科治疗放射卫生防护标准》中的检测方法对伽玛刀进行了剂量学参数检测,检测胶片用胶片剂量分析软件进行分析,得出图像降噪前后的分析结果,用SPSS 11.0对分析结果进行配对t检验。检验结果显示,伽玛刀验证胶片图像降噪处理前后照射野尺寸与标称值最大偏差的分析结果差异有统计学意义(t=7.600,P<0.01),不同尺寸准直器的照射野半影宽度的分析结果差异有统计学意义(t=5.334,P<0.01)。说明图像噪声对伽玛刀剂量学参数检测结果有影响,可能导致检测结果出现偏差。
In order to analyze the image noise effect on the results of Gamma knife dosimetry parameter test, we tested the dosimetry parameters of the Gamma knives according to GBZ 168-2005 Radiological protection standards of X （y）- ray stereotactie radiosurgery for head treatment. Dose analysis software was applied to examine the testing film before and after image denoising, and SPSS ll. 0 software was used for statistical analysis. The results showed that there was a significant difference in the results of the maximum deviation between radiation field size and its nominal value （t=7. 600, P〈0. 01） and the radiation field＇s penumbra region width of collimators also had significantly different sizes （t= 5. 334,P〈0. 01） before and after image denoising. This study indicated that the image noise could influence the results of testing Gamma knife dosimetry varameters, so as to cause deviation
出处
《生物医学工程学杂志》
CAS
CSCD
北大核心
2012年第6期1089-1093,共5页
Journal of Biomedical Engineering
关键词
伽玛刀
图像噪声
剂量学参数
Gamma knife Image noise Dosimetry parameters
