通过深度学习支持的CMR动脉旋转标记 (DeepMASL) 来绘制心肌动脉血流的精度提高:微球 in vivo验证
Ran Li1, Caleb Berberet1, Qi Huang1
1Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, United States.
概括
一种新的深度学习方法 (DeepMASL) 在冠状动脉疾病的狗中显著提高了心肌血流 (MBF) 测量精度. 这种先进的动脉旋转标记技术为诊断心脏 perfusion 缺陷提供了一个有希望的非对比方法.
科学领域:
- 心血管成像 - 心血管成像
- 医学物理 医学物理
- 人工智能在医学中的应用
背景情况:
- 心肌动脉旋转标记 (ASL) 方法与噪声作斗争,限制了精确的心肌动脉血流量 (MBF) 量化.
- 现有的ASL技术对背景和生理噪声敏感,影响诊断可靠性.
研究的目的:
- 开发和验证一个支持深度学习的ASL方法 (DeepMASL),用于准确的MBF量化.
- 为了评估DeepMASL在诱导冠状动脉狭窄的狗模型中的性能.
主要方法:
- 一个基于物理的深度学习网络 (DeepMASL) 使用具有不同噪音水平的合成ASL信号进行训练.
- 用DeepMASL测量心肌动脉血流量,并与健康和狭窄的狗的侵入性微球测量进行比较.
- 在不同的生理条件下,狗接受了诱导的高血压,以评估MBF.
主要成果:
- 深度MASL将MBF低估率从33-49% (非深度MASL) 降至10%以下.
- 在不同的狭窄水平上观察到DeepMASL和微球MBF值之间的强相关性 (r = 0.85-0.86).
- 布兰德-阿尔特曼分析显示,对于DeepMASL测量,偏差最小和可接受的变化.
结论:
- 在冠状动脉狭窄的情况下,DeepMASL显著提高了区域MBF量化的准确性.
- 经过验证的DeepMASL技术显示出在心肌输液缺陷的非对比诊断中临床翻译的潜力.
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