无心电图的电影MRI与数据驱动的心脏运动集群,以量化心室功能
Zhengyang Ming1,2, Arutyun Pogosyan3, Chang Gao1,2
1Physics and Biology in Medicine Graduate Program, University of California, Los Angeles, California, USA.
NMR in biomedicine
|January 10, 2024
概括
这项研究引入了一种新的自闭式电影MRI方法,使用数据驱动的集群来量化心脏功能,克服传统技术的局限性. 这种新的方法可以在没有心电图 (ECG) 门的情况下准确评估心室功能.
科学领域:
- 心血管成像 - 心血管成像
- 医学物理 医学物理
- 生物医学工程 生物医学工程
背景情况:
- 目前用于评估心脏功能的cine MRI在实时量化方面存在局限性.
- 现有的方法通常假定心脏运动 (周期性) 是正常的,这可能不适用于所有患者.
- 需要先进的MRI技术来准确评估心室功能,特别是非周期性心律.
研究的目的:
- 开发一种自闭式电影MRI采集技术.
- 实施数据驱动的集群,以精确地对心脏运动阶段进行分类.
- 为了使心脏功能的可靠量化使用MRI没有心电图 (ECG) 门.
主要方法:
- 采用了笛卡尔的黄金步平衡稳定状态自由前行序列.
- 主要组件分析和k-means集群被用于心脏相位组合.
- 图像质量,信号与噪声比率 (SNR),对比度与噪声比率 (CNR) 和布兰德-阿尔特曼分析被用于与ECG-gated方法进行比较.
主要成果:
- 拟议的基于集群的方法表明,与ECG-gating相比,时间紧性得到了改善 (p < 0.001).
- 图像质量高得分在末缩和末腹缩阶段实现,即使在患有心律失常的人中也是如此.
- 在基于集群的方法与参考 cine 方法得出的双心室喷射分数和体积中观察到微不足道的偏差.
结论:
- 使用数据驱动集群的无心电图的心脏MRI是可行的技术.
- 这种新的方法可以准确量化心脏功能.
- 该方法对评估不同患者群体的心脏功能,包括心律失常患者,显示出有前途.
更多相关视频
08:10Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
Published on: July 20, 2022
1.7K
10:17Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
Published on: April 11, 2025
600
相关概念视频
01:24Magnetic Resonance Imaging
5.2K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
5.2K
01:17Imaging Studies for Cardiovascular System I:Echocardiography
334
Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...
334