摘要
目的:研究常规CT头部、胸部和腹部扫描过程中Z轴扫描位移对患者主要器官剂量及有效剂量的影响。方法:等间隔设置Z轴位移量,基于临床常用扫描参数,采用SR250软件估算患者器官剂量和有效剂量。结果:有效剂量产生规律性渐变,部分器官剂量对Z轴位移反应敏感。结论:在CT扫描过程中,可以有目的地避开或尽可能远离X射线敏感器官,以减小器官剂量,控制辐射风险。
Objective To investigate the influence of organ dose and effective dose on patients for different Z value during head, chest and abdomen CT scan. Methods With equispaced displacement on axis Z, organ dose and effective dose was estimated by using SR250 software with commonly used CT exposure parameters. Results Effective dose changed gradually for different Z value, some organ dose was sensitive to the Z location. Conclusion It is necessary to avoid X-ray sensitive organ in CT examination to minimize radiation risk.[Chinese Medical Equipment Journal,2009,30（9）：5-6,13]
出处
《医疗卫生装备》
CAS
2009年第9期5-6,13,共3页
Chinese Medical Equipment Journal
基金
国家自然科学基金项目(30870751)
