低排CT提高冠状动脉成像检查成功率的策略

目的评估系统干预对提升32层CT冠状动脉成像成功率及图像优良率的价值。方法 188例疑诊冠状动脉粥样硬化性心脏病患者进行冠状动脉CT检查,男性99例,女性89例;年龄34~87岁,平均（63±12）岁,随机分为干预组、常规组。干预组105例,采用预约检查,从心率、呼吸、扫描层厚、相关注意事项等方面全面提前准备。常规组83例,直接登记检查。比较2组的心率控制情况,一次扫描成功率及图像优良率。结果 〈70次/min为标准,干预前2组心率差异无统计学意义。干预后干预组心率合格率明显高于常规组（χ2=8.095,P〈0.05）,干预组一次成功率（93.3%）明显高于常规组（66.3%）（χ2=22.417,P〈0.05）,干预组优良率（81.6%）亦高于常规组（45.5%）（χ2=21.416,P〈0.05）。结论系统干预能有效提高32层CT冠状动脉成像检查的成功率和图像的优良率。

Strategies to improve the success rate of low-slice CT coronary artery imaging

Objective To evaluate the value of system intervention to enhance the achievement ratio and fineness ratio in 32-slice CT coronary artery angiography.Methods One hunded and eighty-eight patients with suspected coronary artery 99 men,89 women;mean age（63±12）years;range：34~87years] accepted CT scan and were randomly divided into 2 groups.Intervention group of 105 patients,by appointment checks,from the heart rate,breathing,slice thickness,and other relevant considerations were fully prepared in advance.Conventional group of 83 cases,direct the registration examination.The situation of heart rate control,Success rate of one scan and image quality were compared.Results To less than 70 beats per minute as the standard,the two groups before intervention did not have statistically significant difference in heart rate.After the intervention,the passing rate of heart rate of intervention group was significantly higher than Conventional group（χ2=8.095,P〈0.05）.A success rate of the intervention group（93.3%） was significantly higher than the conventional group（66.3%）（χ2=22.417,P〈0.05）,good rate of 81.6% in the intervention group was also higher than normal group of 45.5%,rate of between image quality of the two groups of image quality was statistically significant（χ2=21.416,P〈0.05）.Conclusion System intervention can effectively improve the achievement ratio and the image quality ratio of 32-layers CT coronary artery imaging.