在脊髓的多回声梯度回声成像中,对呼吸引起的B0场波动进行了基于导航器的优化校正
Laura Beghini1, Silvan Büeler2, Martina D Liechti2
1Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway.
Magnetic resonance in medicine
|March 4, 2025
概括
这项研究引入了优化的导航器处理,以减少脊髓MRI中呼吸诱导的人工物. 这种新方法显著提高了图像质量,提高了信号噪声比和对比噪声比,以获得更好的可视化.
科学领域:
- 医疗成像医学成像
- 神经成像是一种神经成像.
- 磁共振成像是一种磁共振成像技术.
背景情况:
- 脊髓的多回声梯度回声 (ME-GRE) 成像易受呼吸引起的B0场波动的影响.
- 这些波动因肺部接近而加剧,导致幽灵文物,降低图像质量.
- 标准的导航器处理技术对于脊髓成像通常是无效的.
研究的目的:
- 开发和验证用于脊髓ME-GRE成像的专门导航器处理.
- 为了减轻呼吸引起的B0场波动和相关的幽灵艺术品.
- 增强脊髓MRI中信号与噪声比率 (SNR) 和对比与噪声比率 (CNR).
主要方法:
- 获得了6名健康志愿者在自由呼吸期间获得的3T ME-GRE脊髓数据.
- 使用中线导航器读数和呼吸带记录.
- 实现了定制导航器处理,包括FFT,间隔选择,SNR加权平均和使用带数据的新型相解封算法.
- 在重建之前,通过相模解调校正成像数据.
主要成果:
- B0场的波动和幽灵是最明显的在下宫和上 lumbosacral 带.
- 优化的导航器校正在所有脊髓区域显著改善了视觉质量和定量指标 (SNR,CNR,幽灵).
- 在高场波动的地区观察到SNR/CNR (高达29%/37%) 的显著群体平均增加.
结论:
- 专门的基于导航器的校正有效地减少了脊髓中幽灵文物ME-GRE.
- 该技术增强了SNR和CNR,从而改善了解剖图像质量.
- 这种方法为临床和研究应用提供了实际的解决方案,改善了脊髓MRI的一致性.
更多相关视频
06:26Author Spotlight: Exploring Breathing Techniques and Digital Solutions for Enhancing Running Performance
Published on: September 27, 2024
356
06:53Management of Respiratory Motion Artefacts in 18F-fluorodeoxyglucose Positron Emission Tomography using an Amplitude-Based Optimal Respiratory Gating Algorithm
Published on: July 23, 2020
5.5K
相关概念视频
01:23Mechanical Ventilation III: Noninvasive Ventilation
68
Noninvasive positive-pressure ventilation (NIPPV), continuous positive airway pressure (CPAP), and bilevel positive airway pressure (BiPAP) are essential methods in respiratory care. These ventilation techniques offer unique benefits for patients with various respiratory conditions, providing adequate support without requiring intubation. Let's explore how each method is crucial in improving patient outcomes and enhancing respiratory therapy.
Noninvasive Positive-Pressure Ventilation...
Noninvasive Positive-Pressure Ventilation...
68
01:30Mechanism of Breathing I: Inspiration
1.2K
Introduction to Inspiration: The Respiratory System in Action
The respiratory system, an essential network for breathing, comprises the conducting and respiratory zones, each playing a crucial role in the overall process of respiration. Let us explore the detailed mechanism of inspiration, or inhalation, which is the first phase of the respiratory cycle.
Pathway of Air during Inspiration
During inspiration, air enters our body through the nose or mouth and moves through the conducting zone,...
The respiratory system, an essential network for breathing, comprises the conducting and respiratory zones, each playing a crucial role in the overall process of respiration. Let us explore the detailed mechanism of inspiration, or inhalation, which is the first phase of the respiratory cycle.
Pathway of Air during Inspiration
During inspiration, air enters our body through the nose or mouth and moves through the conducting zone,...
1.2K
01:20Assessment of Ventilation I: Respiratory Rate
981
Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
981
01:21Mechanism of Breathing III: The Accessory Muscles
1.9K
The Role of Accessory Muscles in the Respiratory System
The respiratory system is a complex network that relies on primary respiratory muscles like the diaphragm, but also involves accessory muscles to enhance lung expansion and airflow during both inhalation and exhalation.
Enhancing Inhalation with Accessory Muscles:
Accessory muscles such as the sternocleidomastoid, scalene, intercostal, and abdominal muscles are crucial when additional respiratory effort is required, such as during deep...
The respiratory system is a complex network that relies on primary respiratory muscles like the diaphragm, but also involves accessory muscles to enhance lung expansion and airflow during both inhalation and exhalation.
Enhancing Inhalation with Accessory Muscles:
Accessory muscles such as the sternocleidomastoid, scalene, intercostal, and abdominal muscles are crucial when additional respiratory effort is required, such as during deep...
1.9K
01:23Mechanism of Breathing II: Expiration
852
The Physiology of Expiration: A Seamless Respiratory Process
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration:
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration:
852
01:18Neural Control of Respiration
2.0K
The neural regulation of respiration is a meticulously coordinated process primarily controlled by the respiratory centers located within the brainstem. These centers, composed of specialized neurons, transmit nerve impulses that control the contraction and relaxation of our respiratory muscles.
Respiratory Centers in the Brainstem
Two primary areas comprise the respiratory center: the medullary respiratory center in the medulla oblongata and the pontine respiratory group in the pons. The...
Respiratory Centers in the Brainstem
Two primary areas comprise the respiratory center: the medullary respiratory center in the medulla oblongata and the pontine respiratory group in the pons. The...
2.0K