The Research and Solution Scheme on Relationship between Dual-Source CT Coronary Artery CTA Artifact and Heart Rate Change
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摘要: 目的: 研究双源CT成像质量和错层伪影出现原因,探讨成像质量不佳的原因和解决方法。方法: 回顾性分析自2010年2月至2010年6月70例临床疑似冠心病人双源CT冠状动脉CTA图像和心电监测资料。比较出现错层伪影和无错层伪影的病人的平均心率、心率波动、心率变异和平均R-R间期的差异。结果: 出现错层伪影和无错层伪影病人的平均心率、心率波动、心率变异和平均R-R间期没有显著性差异。结论: 在双源CT使用中,平均心率、心率波动、心率变异、平均R-R间期等参数不是直接或主要导致图像质量不佳和错层伪影的主要原因,这与双源CT的设备性能和数据采集方式有关。导致图像伪影的原因是心律不齐、扫描过程中的体位移动,出现伪影后进行心电编辑重新发现和选择不同心动周期心脏运动相位相同的重建时间窗可以纠正错层伪影。Abstract: Purpose: The reason of imaging quality and wrong layer artifact of coronary arteries CTA with Dual-source CT and heart rate and to discuss the reason of poor imaging quality and the solution.Method: 70 cases of coronary arteries CTA imaging and ECG data of patients with suspected coronary artery disease from February 2010 to July 2010 were retrospectively analyzed.The difference of average heart rate,fluctuation of heart rate,variation of heart rate and average R-R period between the patients who has artifact and no artifact was compared.Results: Average heart rate,fluctuation of heart rate,variation of heart rate and average R-R period between the patients who has artifact and no artifact is no significant difference.Conclusion: Use in the double source CT in,average heart rate,heart rate motion,heart rate variation and average R-R expect to etc.parameter to isn't direct or mainly cause picture quality poor and wrong layer false shadow of main reason,this and double equipments function and data of the source CT collect a way relevant.Because the reason of picture false shadow is a heart Lyu not and together,the body in the scanning process move and appear false movie queen to carry on a heart electricity editor afresh detection and choose sport that is different to move period heart mutually same reconstruction time the window can rectify a wrong layer false shadow.
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Keywords:
- dual-source CT /
- coronary artery CTA /
- heart rate /
- wrong shadow
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