将冠状动脉CT血管造影的图像质量与宽探测器CT中ECG-gating和没有ECG的图像质量进行比较
Kun Wang1, Yueqiao Zhang1, Bin Chen1
1Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Frontiers in cardiovascular medicine
|April 28, 2025
概括
非心电图 (ECG) 导入的冠状动脉CT血管造影 (CCTA) 与传统的ECG导入的CCTA提供类似的图像质量和诊断准确性,显著减少扫描时间. 这种没有心电图的CCTA在临床上适用,特别是在紧急情况下.
科学领域:
- 放射学 放射学是一门学科.
- 心血管成像 - 心血管成像
- 医学成像技术 医学成像技术
背景情况:
- 传统的ECG-gated冠状动脉CT血管造影 (CCTA) 是冠状动脉疾病的标准诊断工具.
- 电脑心电图门将图像采集与心脏周期同步,以最大限度地减少运动工件.
- 然而,心电图门可以延长检查时间,在某些患者群体中可能具有挑战性.
研究的目的:
- 为了比较图像质量,辐射剂量和无心电图CCTA和常规心电图CCTA之间的检查时间.
- 评估无心电图CCTA的临床适用性和诊断性能.
- 为了优化辐射剂量,使用修改后的ECG-less协议.
主要方法:
- 一项前性研究涉及109名疑似冠状动脉疾病的患者.
- 患者被分为没有心电图 (n=59) 和有心电图 (n=50) 的两组.
- 分析了客观和主观的图像质量指标,检查时间和针对侵入性冠状动脉血管学的诊断性能. 为了减少辐射剂量,使用了经过修改的ECG-less协议.
主要成果:
- 没有心电图的CCTA的检查时间显著缩短 (225s vs 330s),但初始辐射剂量较高 (2.83 mSv vs 1.90 mSv).
- 一个经过修改的ECG-less协议将有效剂量降低了28% (2.03 mSv),与传统组相比相当.
- 没有观察到主观图像质量或SNR/CNR的显著差异. 狭窄检测的诊断准确度很高 (每患者94.4%的灵敏度,50%的特异性).
结论:
- 没有心电图的CCTA提供了与传统的ECG-gatedCCTA相匹配的图像质量和诊断准确性.
- 它显著减少了检查时间,提高了临床适用性,特别是在紧急情况下.
- 这种技术适用于ECG引线位置很难或不可靠的场景.
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