相关实验视频
Updated: Jun 14, 2025
09:14
Cardiac Magnetic Resonance Imaging at 7 Tesla
Published on: January 6, 2019
11.4K
加速化学转移编码心血管磁共振成像,使用分辨率增强网络
Manuel A Morales1, Scott Johnson1, Patrick Pierce1
1Department of Medicine (Cardiovascular Division), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA.
概括
一种新的深度学习方法,FastCSE,加速了心血管磁共振化学转移编码 (CSE) 用于心肌脂肪成像. 这种技术可以减少喘息,而不会影响脂肪可视化质量.
科学领域:
- 心血管磁共振 (CMR) 是一种心血管磁共振技术.
- 医疗成像医学成像
- 医疗保健中的人工智能
背景情况:
- 心血管磁共振 (CMR) 化学转移编码 (CSE) 对心肌脂肪成像至关重要.
- 加快CSE获取对于提高患者舒适度和扫描效率至关重要.
研究的目的:
- 开发和评估一个深度学习网络,FastCSE,以加速CSE成像.
- 通过使用一种新的深度学习方法,提高图像清晰度并减少CSE扫描中的工件.
主要方法:
- 快速CSE使用超分辨率生成对抗网络进行复杂值的图像增强.
- 该网络在1519名患者的大数据集上接受了培训,并进行了前性验证.
- 双回声CSE图像以各种分辨率获取,并使用FastCSE处理以恢复清晰度.
主要成果:
- FastCSE成功地在线重建了CSE图像,显著减少了喘息的数量.
- 与标准GRAPPA相比,在FastCSE处理的图像中,图像的清晰度得到了改善,并且响声的工件减少了.
- 在FastCSE图像中的模糊性与更高分辨率,非加速扫描相提并论.
结论:
- 深度学习加速的CSE (FastCSE) 在CMR心肌脂肪成像中有效地减少了喘息.
- 该技术保持图像质量和清晰度,为心血管成像提供了有前途的进步.
- 在FastCSE中,图像的清晰度与标准化的并行成像方法相提并论.
相关概念视频
01:24Magnetic Resonance Imaging
5.0K
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...
5.0K
01:14NMR Spectrometers: Resolution and Error Correction
679
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
679
01:12Double Resonance Techniques: Overview
191
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
191
01:05Atomic Nuclei: Magnetic Resonance
639
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
639