降低照射剂量在头颅多排CT中的临床应用

The Application of Reducing the Radiation Dose of Head Multi-Detector Row CT

目的:对比降低照射剂量前后头颅多排CT的图像质量,探讨低剂量头颅CT临床应用的可行性。方法:头颅CT受检者随机分组,用原设置的标准条件和不同的低剂量条件分别扫描,采用不同重建卷积函数成像,对图像质量行等级盲法评价。结果:半剂量条件下采用适当的重建卷积函数,其图像质量与标准条件下差异并无显著性意义。结论:利用现有设备,适当降低头颅CT的照射剂量,同时确保成像质量是完全可行的。

Objective：To assess the value of low dose CT scans in the head,by comparing the quality among the head images scaned with standard dose and different low doses. Methods：People who underwent head CT scans were divided into several groups at random. Images were achieved by different dose scans and reconstructed with different kernels. The quality of images was assessed by a blind method. Results.. No distinct statistic qualitative difference was found between the standard and half dose scans with a suitable kernel. Conclusion： It is feasible to lower the radiation dose of head muti-detector row CT,which will not affect the quality distinctly.