三维高分辨率黑血晚期加多增强成像,以改善心房痕评估
Dongyue Si1, Yanfang Wu1, Jingjing Xiao1
1From the Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China (D.S., B.L., Z.N., H.D.); Coronary Care Unit, Fuwai Central China Cardiovascular Hospital, Zhengzhou, Henan, China (Y.W.); Department of Medical Engineering, Xinqiao Hospital, Army Medical University, Chongqing, China (J.X.); Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China (X.Q., J.Y., P.G., Y.L., D.Y., K.C., T.C., Z.C., X.L., Q.F.); School of Medical Technology, Beijing Institute of Technology, Beijing, China (R.G.); and Department of Radiology, Case Western Reserve University, Cleveland, Ohio (D.A.H.).
一种新的心脏核磁共振 (MRI) 技术改善了对心房动进行射频切除 (RFA) 后心房痕的可视化. 这种方法增强了痕检测和量化,潜在地改善了患者的治疗结果和治疗计划.
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:
- 射频移除 (RFA) 是心房的关键治疗方法,旨在减少心律失常.
- 准确评估心房痕对于指导RFA和预测患者预后至关重要.
- 传统的明亮血液晚期加多增强 (LGE) MRI 在可视化心房痕方面存在局限性,原因是对比度差.
研究的目的:
- 开发和评估一个自由呼吸的LGE心脏MRI技术.
- 该技术旨在同时获得高空间分辨率的黑血和亮血图像.
- 目标是改善心房痕检测和量化.
主要方法:
- 开发了一种新的自由呼吸,导航门,暗血相位敏感反转恢复 (PSIR) 序列.
- 两个共同注册的3D卷 (黑血和亮血) 获得了高空间分辨率 (1.25 × 1.25 × 3 mm3).
- 该序列在RFA后的20名患者中进行了对心房的测试,将图像对比度和痕量化与传统PSIR和电解剖绘图 (EAM) 进行了比较.
主要成果:
- 新的PSIR序列成功获得了所有参与者的高分辨率3D图像,平均扫描时间为8.3分钟.
- 与传统PSIR (0.60au与0.20au相比,P<.01) 相比,观察到明显改善的痕与血液对比度.
- 使用新序列的痕区域量化显示出与EAM有很强的相关性 (r = 0.66,P < .01),与传统PSIR不同 (r = 0.13,P = .63).
结论:
- 开发的黑血PSIR序列提供了高分辨率的黑血和亮血图像.
- 这种技术为可视化RFA后心房痕提供了卓越的图像对比度.
- 与传统的亮血LGEMRI相比,它可以实现更准确的痕量化.
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