摘要
目的:探讨心律及其波动与重建相位窗的关系。方法:268例疑似冠心病病人进行冠脉成像,按检查时心率及其波动分为以下四组:平均心率小于等于65次/min、心率波动小于等于6次组(A组);平均心率小于65次/min、心率波动大于6次/min组(B组);平均心率大于65次/min、心率波动小于等于6次/min组(C组);平均心率大于65次/min、心率波动大于6次/min组(D组);接受40层螺旋CT冠状动脉成像术,统计其最佳重建相位窗。结果:A组重建相位窗集中分布于60%～70%B组及C组RCA重建相位窗主要分布于30%～40%及60%～70%,LAD及LCX主要分布于60%～80%。D组RCA重建相位窗主要分布于30%～40%,LAD及LCX重建相位窗不规律。结论:心率及其波动对40层螺旋CT冠状动脉成像的最佳重建相位窗有重要影响,心率控制在65次/min及以下,心率波动控制在6次/min及以下,最佳重建相位窗通常在60%～70%。心率在65次/min以上或波动大于6次/min的,一定要多时相重建。
Purpose： To evaluate the effect of heart rate and heart rate fluctuation on reconstruction window. Methods： Two hundred and sixty - eight patients with suspected coronary artery disease were divided into four groups according to their heart rates and fluctuations. Group A： the average heart rate was smaller than or equal to 65 per minute, heart rate fluctuation was smaller than or equal to 6; group B： the average heart rate was smaller than 65 per minute, heart rate fluctuation was above 6; group C： the average heart rate was higher than 65 per minute, heart rate fluctuation was smaller than 6; group D： the average heart rate was higher than 65 per minute, heart rate fluctuation was above 6. All these patients were undergone 40 - slice Spiral CT coronary angiography. The best reconstruction window of them were compared. Results： The best reconstruction window of group A distributed in 60% - 70% window. The best reconstruction window of RCA in group B and C mainly distributed in 30% - 40% window and 60% - 70% window, that of LAD and LCX mainly distributed in 60% - 80%. The best reconstruction window of RCA in group D mainly distributed in 30% - 40%, that of LAD and LCX were not constant. Conclusion： The heart rate and the fluctuation had the major effect to the best reconstruction window of multi - slice spiral CT coronary angiography. The best reconstruction window was usually in 50% - 70%, when the heart rate was controlled at 65 per minute and below and the heart rate fluctuation was controlled at 6 or below 10. When the heart rate was above 65 per minute or the fluctuation was above 10, multi- phase reconstruction must be carried on.
出处
《中国医学计算机成像杂志》
CSCD
北大核心
2009年第3期238-242,共5页
Chinese Computed Medical Imaging
关键词
多层螺旋CT
冠状动脉成像
心率
心率波动
重建相位窗
Multi -slice spiral CT
Coronary angiography
Heart rate
Heart rate fluctuation
Reconstruction window
