【摘 要】
：
目的探讨GE各系列CT机主要性能指标的实验研究.方法CT机质量控制检测是CT机应用中的重要环节,笔者采用Victoreen公司生产的AAPM体模、4000M+剂量仪及10cm笔型电离室对GE各系
【机 构】
：
广东省职业病防治院放射卫生防护所510310
论文部分内容阅读
目的探讨GE各系列CT机主要性能指标的实验研究.方法CT机质量控制检测是CT机应用中的重要环节,笔者采用Victoreen公司生产的AAPM体模、4000M+剂量仪及10cm笔型电离室对GE各系列17种CT机的十项主要性能指标进行了检测.结果标准算法下10种低档CT的空间分辨率为1.0mm,7种中高档机型可达0.75mm;高分辨率算法下,Lightspeed Qx/Ⅰ型可达0.4mm,而8800型却只有0.75mm.所抽检的全部CT其密度分辨率均在0.6%,3.5mm以内,最好的可小于2.5mm.结论高档
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