对QSM+qBOLD (或QQ) 在检测生理变化中高氧提取分数 (OEF) 的灵敏度评估
Praveena Elanghovan1, Thanh Nguyen2, Pascal Spincemaille2
1Department of Biomedical Engineering, University at Buffalo, Buffalo, NY, USA.
概括
这项研究表明,一种新的MRI方法,即定量灵敏度映射加上定量血氧水平依赖成像 (QQ),可以在高通风期间检测出增加的氧气提取分数 (OEF). 这种技术对研究神经系统疾病中大脑代谢具有前景.
科学领域:
- 神经成像是一种神经成像.
- 脑血管生理学 脑血管生理学
- 医学物理 医学物理
背景情况:
- 定量敏感性映射加上定量血氧水平依赖成像 (QSM+qBOLD或QQ) 是一种新的MRI技术.
- 之前的研究表明,在高头期间,QQ对氧气提取分数 (OEF) 降低的敏感性.
- 关于神经系统疾病相关的QQ对增加OEF的敏感性仍然未被探索.
研究的目的:
- 调查QQMRI方法对增加OEF的敏感性.
- 将QQ的性能与以前基于QSM的OEF方法进行比较.
- 评估QQ在神经疾病中研究大脑代谢的潜力.
主要方法:
- 11名健康受试者在休息和高通风期间接受了MRI扫描.
- 使用3TMRI进行3D多回声梯度回声序 (mGRE) 和动脉旋转标记 (ASL).
- 兴趣地区 (ROI) 分析和对对 t 测试比较了 QQ 和 QSM 之间的 OEF,CMRO2 和 CBF.
主要成果:
- 与休息相比,QQ和QSM都显示在高通风期间OEF增加.
- 在皮层灰质中,QQ-OEF从休息时的36.4±4.7%增加到高通风时的45.0±11.6%.
- QSM-OEF显示了类似的增加,从休息时的35.3±12.5%增加到高通风时的45.0±14.8%.
结论:
- 该QQMRI方法有效地检测生理变化,特别是增加的OEF.
- 在评估OEF时,QQ表现出与QSM相似的敏感性.
- QQ显示了在神经系统疾病中促进大脑代谢研究的潜力.
关键词:
氧气的提取分数.QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ在 QSM + qBOLD 中使用.定量化血液氧气水平依赖的成像学定量敏感性映射测绘 定量敏感性映射更多相关视频
08:35Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction
Published on: August 17, 2022
2.3K
04:20Integration of Brain Tissue Saturation Monitoring in Cardiopulmonary Exercise Testing in Patients with Heart Failure
Published on: October 1, 2019
5.7K
相关概念视频
01:17Assessment of Diffusion and Perfusion
921
Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
921
01:19Special considerations while measuring oxygen saturation
550
Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
550
01:24Pulse Oximetry
311
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
311
01:19Guidelines For Measuring Vital Signs
1.5K
Following these guidelines can help nurses accurately measure vital signs, assess changes in patient conditions, and provide timely treatment when necessary. Adhering closely to the guidelines ensures the accuracy and reliability of the results.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
1.5K
01:19Respiratory Assessment: Purpose and Indications
1.0K
Respiratory assessment is a cornerstone of nursing assessments, crucial for the early detection of patient deterioration. This evaluation transcends routine procedures, representing a critical skill nurses must master to ensure optimal patient care.
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
1.0K
01:20Assessment of Ventilation I: Respiratory Rate
1.0K
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:
1.0K