冠状动脉前瞻性心电门控窄窗采集技术在320排螺旋CT中的应用

目的：探讨使用320排螺旋CT前瞻性心电门控窄窗采集技术，在降低辐射剂量方面的应用。方法：研究组50例采用前瞻性心电门控技术，对照组50例患者采用回顾性心电门控技术，分别测量两组间图像质量以及辐射剂量。结果：两组数据比较，患者的基本情况如年龄、心率、体重和体重指数以及图像质量差异无统计学意义（P〉0．05），有效放射剂量两组间的差异有统计学意义（P=0．0001），前瞻性心电门控组辐射剂量（8．80±2．78）mSv显著低于回顾心电门控组（25．82±8．84）mSv。结论：前瞻性心电门控窄窗采集技术在确保图像质量的同时可以降低辐射剂量。

Narrow Window of Coronary Prospective ECG-gated Acquisition Technology in the 320-slice Spiral CT

Objective： To investigate the use of ECG-gated 320-slice spiral CT forward-looking narrow window acquisition techniques in reducing the radiation dose. Method： group of 50 patients using prospective ECG gating technology, the control group of 50 patients using retrospective ECG gating technology, we measured image quality and radiation dose between the two groups. Results： Comparing two sets of data, the basic situation of the patient such as age, heart rate, body weight and BMI （Body Mass Index, BMI） and image quality difference was not statistically significant （P 〉 0.05）, the effective radiation dose difference between the two groups statistically significant （P= 0.000 1）, prospective ECG-gated radiation dose group （8.80 ± 2.78） mSv was significantly lower than recalled gating group （25.82 ±8.84） mSv. Conclusion： Prospective ECG-gated narrow window capture technology to ensure image quality while reducing radiation dose patients affected.