时间和空间分辨率对心房特征追踪心血管磁共振成像的影响
Jonas Schmidt-Rimpler1, Sören J Backhaus2, Finn P Hartmann3
1University Medical Center Göttingen, Department of Cardiology and Pneumology, Georg-August University, Göttingen, Germany; University Medical Center Göttingen, Institute for Diagnostic and Interventional Radiology, Georg-August University, Göttingen, Germany.
International journal of cardiology
|November 5, 2023
概括
优化心血管磁共振特征跟踪 (CMR-FT) 解析度是准确心房功能分析的关键. 对于应变,建议使用30/周期的时间分辨率,而对于应变率评估,则需要50/周期.
科学领域:
- 心脏病学 心脏病学
- 医疗成像医学成像
- 生物医学工程 生物医学工程
背景情况:
- 心血管磁共振特征跟踪 (CMR-FT) 提供了超越体积分析的预后价值.
- 使用CMR-FT进行心房功能分析越来越重要.
- 目前缺乏用于心房功能分析的标准化最佳分辨率参数.
研究的目的:
- 用CMR-FT.评估不同时间和空间分辨率对心房功能评估的影响.
- 确定最佳的CMR-FT参数,以准确测量左心房 (LA) 应变和应变率 (SR).
主要方法:
- 在12名健康志愿者和9名心力衰竭患者中进行了CMR-FT.
- 拍摄的电影序列具有不同的时间分辨率 (20-50/周期) 和空间分辨率.
- 评估了观察者间和观察者内部的可重复性.
主要成果:
- 较高的时间分辨率与增加的绝对应变和SR值相关.
- 观察到LA总应变的显著变化高达30/周期.
- 在LA SR评估中,显示了高达50/周期的显著变化.
- 与时间分辨率相比,空间分辨率对应变评估的影响较小.
结论:
- 时间和空间分辨率都会影响心房功能评估的准确性.
- 一致的LA应变评估需要标准的空间分辨率和30/周期.
- 准确的LA SR评估需要至少50/周期的时间分辨率.
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