摘要
目的:通过理论、临床实践和实验室检测3种方法介绍非晶硒平板探测器伪影的产生,分析伪影产生的原因,探讨解决产生伪影的方法,延长非晶硒平板探测器的使用寿命。方法:通过实际工作和实验室检测伪影,针对同一幅图像分析其伪影产生的原因。结果:非晶硒平板探测器伪影产生的原因是点状脱膜所致,选择1000个胸部平片做临床试验,在原有的照相条件下增加照相剂量,可使散在小面积高密度伪影有所减少。结论:为了提高医学影像诊断的正确率,减少被检者的辐射剂量需更换新的平板探测器。
Objective： The ghost effect of amorphous selenium fiat panel detector （a-Se FPD） was studied by theory, clinical practice, and experiments. In order to increase the life of a-Se FPD, the causes of ghost effect as well as corresponding solutions were discussed. Methods： Ghost effects were detected through experiment and clinical practice, and the causes of ghost in a same image were analyzed. Results： The ghost effect in a-Se FPD is caused by point desquamation of selenium film. According to an analysis of a thousand chest images in clinic, an increasing of x-ray doses can reduce the number of dispersed small size ghosts. Conclusion： In order not to affect clinical diagnosis, replacing the a-Se FPD with a new one is necessary.
出处
《中国医学装备》
2013年第2期21-23,共3页
China Medical Equipment
关键词
探测器
脱膜
环境条件
投照条件
Detector
Point desquamation
Ambient condition
Exposure condition
