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心脏MRI T2映射与心脏阶段获取和改进的运动敏感驱动平衡血压抑制
Ebtihal Raheem Hammood1, Shapoor Shirani2, Sahar Asl Fallah2
1Radiation Sciences Department, School of Allied Medical Sciences, International Campus, Tehran University of Medical Sciences, Tehran 1417744361, Iran.
Radiology advances
|October 8, 2025
概括
梯度-旋转-回声 (GraSE) 序列在心血管磁共振 (CMR) 成像中提供可重现的T2映射,在静缩和放缩阶段之间没有显著差异. 改进的运动敏感驱动平衡 (iMSDE) 是一种可行的黑血技术,在静脉缩中显示的器件较少.
科学领域:
- 心血管磁共振 (CMR) 图像成像
- 生物医学工程 生物医学工程
- 医学成像物理 医学成像物理
背景情况:
- 心血管磁共振 (CMR) 影像利用T2映射进行心肌组织属性评估.
- T2地图易受运动工件和信号干扰的影响,需要先进的技术来提高质量.
- 梯度旋回回声 (GraSE) 序列,特定的心脏阶段和暗血 (DB) 成像被探索以提高可靠性.
研究的目的:
- 为了评估T2放松时间的变化和图像质量,T2地图使用CMR中的GraSE序列.
- 为了比较T2地图的收购在结束-心心缩与结束-腹心缩,和没有脂肪和 (FS).
- 评估改进运动敏感驱动平衡 (iMSDE) 的可行性,作为与双反转恢复 (DIR) 相比的替代DB技术.
主要方法:
- 开发了五种DB GraSE序列变体,并在1.5特斯拉MRI扫描仪上进行了测试.
- 44名健康的志愿者接受了各种GraSE序列,包括终端腹痛 (ED) 和终端心痛 (ES) 收购,有或没有FS.
- 四种变种使用iMSDE进行血液抑制,而一种商业变种 (GraSE-CO) 使用DIR.
主要成果:
- 分析了34名参与者的数据;在GraSE变体中没有发现全球T2平均值的显著差异 (P > .05).
- 在所有GraSE序列中观察到全球T2值的优异的读者内部和读者间一致性 (r > 0.8).
- 对于所有GraSE变体,图像质量被评为中等到良好,在末缩成像中,人工物发生率较低,而在末缩成像中则较低.
结论:
- 所有的GraSE序列变异都显示出高可重现性,心肌T2值不受心脏阶段的影响.
- iMSDE技术是T2映射的可行的替代DB方法.
- 使用iMSDE在静脉缩期间的获取导致人工物发病率较低,相比于静脉缩.
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