使用4D与2D相对比的非增强型MRI流量评估在已修复的Fallot成年人的四分法中
Jean Alfred François Champollion1, Thomas Senage2, Lara Marteau3
1CHU Nantes PHU 6 imagerie médicale, Nantes, France. radiologiechampollion@gmail.com.
European radiology
|April 17, 2025
概括
没有对比剂的四维相位对比 (4D-PC) 核磁共振是可靠的评估血液流动的成年人修复的四重法洛 (rToF). 虽然它通常是准确的,但它可能略微低估了肺吐.
科学领域:
- 心血管成像 - 心血管成像
- 医学物理 医学物理
- 放射学 放射学是一门学科.
背景情况:
- 经过修复的四重法洛特病 (rToF) 的成年人需要定期监测心脏功能和血液流动.
- 定量MRI对于评估rToF患者的血液动力学至关重要.
- 非对比成像技术是首选的,以尽量减少与对比剂相关的风险.
研究的目的:
- 在rToF患者中,使用4D-PC MRI与2D-PC MRI相比,评估量化流量分析的可靠性.
- 评估非对比的4D-PC流MRI对心脏流量测量的准确性和可重复性.
- 确定4D-PCMRI是否可以作为对比增强方法的可行替代方案.
主要方法:
- 对26名成年rToF患者 (2021-2023) 的回顾性研究,使用4D-PC和2D-PCMRI序列,没有对比剂.
- 使用这两种技术进行了对大动脉和肺部流量的定量测量.
- 统计分析包括学生的T-测试用于平均值比较和林的一致性相关系数 (CCC) 达成一致,与观察者之间的评估.
主要成果:
- 与非4D序列 (47分钟) 相比,4D-PCMRI扫描时间显著缩短 (13分钟).
- 在肺 (CCC=0.75) 和大动脉 (CCC=0.91) 两种流动中,在4D-PC和2D-PCMRI之间观察到强烈一致的吐分数.
- 在4D-PCMRI中,肺吐分数 (-10% ± 15%) 和逆流体积 (-13mL ± 18mL) 的系统低估被发现.
结论:
- 非增强的4D-PC流动MRI证明了在rToF患者的定量流动评估的可靠性.
- 虽然准确,但4D-PCMRI可能低估了肺吐,需要仔细解释.
- 4D-PC MRI为rToF随访中的心脏流量评估提供了一个有希望的,可重复的,并可能更舒适的替代方案,减少了加多暴露.
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