儿童低剂量头颅CT的临床应用

Clinical Application of Low Radiation Dose Head CT Scans of Children.

目的对比降低照射剂量前后头颅多排CT的成像质量,探讨适于少年儿童头颅CT检查的低剂量条件及其可行性。方法66例受检者随机分为3组,用原机标准条件或两种不同的低剂量条件分别扫描,以不同卷积函数重建成像,对头颅CT图像质量行盲法等级评价。结果1/2、1/3剂量条件下,调低重建卷积函数值成像,其图像质量与标准条件下并无统计学差异。讨论儿童头颅CT检查中,利用现有设备,选择合适的低照射条件,同时确保成像质量,是恰当可行的。

Objective To study the appropriate parameters of low dose head CT scans of children and assess the feasibility by comparing the quality of images scaned with different dose. Methods The children who underwent the head CT scans were randomly divided into three groups. Images were achieved by the standard or two different low dose scans, which were reconed with different kernel values. The result was assessed by blind method. Results No marked statistical qualitative difference is noted among the images archieved byt the standard or low dose scans reconed with the suitable kernel. Conclusion In the head scans of children, it is feasible to lower the radiation dose of CT, and reserve quality of images.