256层螺旋CT低剂量、低浓度冠状动脉的应用研究

目的 探讨应用双低技术-低千伏(100 kV)、低浓度碘对比剂(270 mgI/ml)在冠状动脉CTA检查中的可行性。方法 将入选标准的100例冠状动脉CTA检查患者,分为A、B两组,B组再根据管电压和碘对比剂不同分为B1组和B2组。A组30例为前瞻性心电门控,采用100 kV、270 mgI/ml威视派克对比剂,B组为回顾性心电门控,其中B1组35例采用100 kV、270 mgI/ml威视派克对比剂,B2组35例采用120 kV、370 mgI/ml碘普罗胺对比剂。计算各组有效辐射剂量。结果 平均有效辐射剂量(ED) A组为(1.32±0.012) mSv、B1组为(5.55±1.04) mSv、B2组为(10.57 ±1.07) mSv。A组与B1组间、A组与B2组间及B1组与B2组间均有统计学差异。结论 应用双低技术-低千伏(100kV)、低浓度碘对比剂,在体重指数≤ 25.0 kg/m²条件下,可以有效降低辐射剂量。

Study of Clinical Application about Coronary Angiography by Low Dosage and Low Concentration In 256 Layer Spiral CT

Objective To explore the feasibility of CTA in the coronary arteries with the double low technology, namely lowkV (100 kV) and low concentration of iodine wcontrast agent (270 mgI/ml). Methods In the inclusion criteria, 100 patients with coronary artery CTA examination are divided into A, B two groups. Group B again divided into B1 and B2 group according to the tube voltage and different iodine contrast agent. A group of 30 cases applied the prospective heart switch control, using 100 kV, 270 mgI/ml Visipaque contrast medium, group B applied retrospective heart switch control, including B1 group of 35 cases with 100 kV, 270 mgI/ml Visipaque contrast medium, B2 group of 35 cases with 120 kV, 370 mgI/ml Iopromide contrast agent. Finally, Calonlate the effective radiation dose of groups. Results The mean effective dose (ED) in group A is (1.32±0.012) mSv, B1 is (5.55±1.04) mSv, B2 group is (10.57±1.07) mSv. Between group A and group B1, group A and group B2 and B1 and B2 group, there is statistically significant. Conclusion Under the condition of body mass index of ≤ 25.0 kg/m² or less, the application of double low technology, low kV (100 kV), low concentration of iodine contrast agent, can effectively reduce the radiation dose.