为自由呼吸运动同时进行多切片加速 纠正晚期加多增强成像
Grzegorz Tomasz Kowalik1, Karl P Kunze1,2, Filippo Bosio1
1Faculty of Life Sciences and Medicine, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK.
Magnetic resonance in medicine
|February 15, 2026
概括
同时多切片 (SMS) 加速自由呼吸运动纠正和平均晚期加多增强MRI (FB PSIR-MoCo LGE) 协议将扫描时间减半. 这种方法保持了对心肌痕评估的良好一致,对图像质量的影响最小.
科学领域:
- 心血管成像 - 心血管成像
- 磁共振成像技术 磁共振成像技术
- 医疗技术 医疗技术 医学技术
背景情况:
- 晚期加多增强 (LGE) 核磁共振是评估心肌痕的关键.
- 传统的LGE协议可能耗时,限制患者的舒适性和吞吐量.
- 需要加速成像技术来提高心脏MRI的效率.
研究的目的:
- 开发和评估加速自由呼吸运动的纠正和平均晚期加多增强MRI (FB PSIR-MoCo LGE) 协议.
- 评估使用同时多切片 (SMS) 成像以缩短采集时间的可行性.
- 将SMS加速LGE的诊断性能与非加速参考协议进行比较.
主要方法:
- 在 FB PSIR-MoCo LGE 序列中实现了同时多切片 (SMS) bSSFP 成像与 GC-LOLA 校正 (多频带系数为2) 的实现.
- 在26名患者中获得了两个协议:SMS加速和非SMS参考.
- 评估了心肌敏度,对比度和噪声比率 (CNRs) 和痕体积;图像质量被评分在4分级.
主要成果:
- 通过SMS获取,扫描时间缩短了两倍 (1.9分 vs 3.7分).
- 图像质量得分略有下降,但仍保持良好至优秀 (3.46对3.64).
- 心肌敏度没有显著差异;痕体积评估显示出很好的一致性 (R2=0.996).
结论:
- 该SMS FB PSIR-MoCo LGE协议有效地减少了50%的扫描时间,对图像质量和心肌度的影响最小.
- 与参考方法相比,这种加快的协议为心肌痕评估提供了很好的协议.
- 短信加速代表了高效的心脏MRI的有希望的进步.
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