低浓度对比剂低管电压在过轻或适中体重患者腹部CT增强扫描中的应用

发布时间：2018-10-31 19:25

【摘要】：目的探讨低浓度对比剂低管电压在过轻或适中体重患者腹部CT增强扫描中应用的可行性,寻找减少腹部CT增强扫描射线剂量及碘摄取量的最优方案。资料与方法选取体重指数(BMI)20 kg/m2的40例过轻患者,随机分为A1组和B1组,每组20例;同时选取20 kg/m2≤BMI25 kg/m2的40例适中体重患者,随机分为A2组和B2组,每组20例。A1组和A2组采用低浓度对比剂低管电压(威视派克270mg I/ml,管电压100 k V)行腹部CT增强扫描,B1组和B2组采用常规扫描方案(欧乃派克300 mg I/ml,管电压120 k V)行腹部CT增强扫描。比较4组的对比噪声比(CNR)、图像质量评分和有效射线剂量(ED)。结果 A1组和B1组、A2组和B2组动脉期、门静脉期的CNR及图像质量评分比较差异均无统计学意义(t=-1.539~0.000,P0.05);B1组动脉期CNR及图像质量评分明显高于A2组和B2组,差异均有统计学意义(P0.05)。结论低浓度对比剂低管电压扫描方案可以在降低碘摄取量及辐射的同时获得与常规增强扫描同等的腹部图像质量;BMI对肝脏动脉期图像质量影响较大,对门静脉期图像质量影响较小,可考虑在肝脏增强检查协议中选择性降低门静脉期电压以降低辐射。
[Abstract]:Objective to explore the feasibility of using low concentration contrast agent and low tube voltage in abdominal CT enhanced scanning in patients with light or moderate body weight, and to find the best scheme to reduce the dose and iodine intake of abdominal CT enhanced scanning. Materials and methods 40 underweight patients with body mass index (BMI) 20 kg/m2 were randomly divided into A1 group and B1 group with 20 cases in each group. At the same time, 40 moderate weight patients with 20 kg/m2 鈮，

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