摘要目的 通过对CT胸部常规扫描与低剂量扫描模式下的剂量长度乘积（DLP）值进行比较，为CT胸部扫描时的条件选择提供数据参考。方法 采用CT-DP检测探头和标准CT剂量体模，测量GE Revolution型256排CT胸部常规扫描模式与低剂量扫描模式下的DLP。结果 对胸部低剂量模式，Chest_Lowdose LARGE SIZE模式，DLP测量值60.16 mGy·cm；Chest_Lowdose SMALL SIZE模式，DLP测量值33.65 mGy·cm。胸部常规扫描模式，DLP测量值276.68 mGy·cm。胸部常规扫描模式DLP值是Chest_Lowdose SMALL SIZE模式的8.22倍，是Chest_Lowdose LARGE SIZE模式的4.60倍。而同为胸部低剂量扫描，根据受检者体型不同，选择Chest_Lowdose LARGE SIZE模式DLP值是Chest_Lowdose SMALL SIZE模式的1.79倍。结论 选择低剂量CT进行胸部扫描能显著降低受检者剂量，对体型瘦小的受检者选择合适的胸部低剂量扫描模式也会明显降低所受剂量。
刘芳, 王小山, 陈英民, 宋钢, 刘乾, 牛菲. 两种CT胸部扫描模式下DLP值的测量与分析[J]. 中国辐射卫生, 2019, 28(6): 633-636.
LIU Fang, WANG Xiaoshan, CHEN Yingmin, SONG Gang, LIU Qian, NIU Fei. Measurement and analysis of DLP values in two chest CT scanning modes. , 2019, 28(6): 633-636.
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