- Below normal: 90-94%. Your blood oxygen level is lower than normal. Environmental factors such as altitude or physical conditions like asthma can cause lower SpO2 levels. - Low: Less than 90%. If your blood oxygen level is low, you may experience more severe symptoms like shortness of...
当大脑皮层受到生理刺激,局部神经元活动增加使其代谢率增高,局部血管扩张,血流量增加,但在增加程度上有明显差异,局部组织中氧的供应量超过代谢的耗氧量,HbO2相对增加,顺磁性的dHb相对减少,表现为该脑区的T2*MR信号强度相对增加。临床应用:fMRI研究已取得了很大的成绩,目前的研究已不仅停留在用fMRI技术来显示神经活动...
Blood-oxygen-level dependent(BOLD) response:measured via functional magnetic resonance imaging (fMRI); changes in local oxygenation of cerebral blood flow can be detected. The method has a high spatial and a low temporal resolution. Because 5-HT affects vasculature itself and causes vasoconstriction,...
Breathing disturbances can occur when the muscles in the roof of your mouth, tongue, and throat relax, partially causing a blockage in your airway and resulting in lower oxygen intake. These disturbances can be caused by factors such as alcohol use, sleeping on your back, congestion, illness,...
aHe looked for the girl whose heart he knew,but whose face he didn't,the girl with the rose 他正在寻找心脏他知道,但面孔他没有,女孩与上升的女孩 [translate] ablood oxygen level–dependent 血液氧气水平依赖 [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语...
价格 免费 App 内购买项目 Oxygen Level & Pulse MonitorS$ 14.48 App 支持 隐私政策 肺活量测试 - 血氧检测: 血氧饱和度, 血氧, 心率 Blood oxygen app 心率+血氧 Oximeter - Track Oxygen SpO2 心脏检测仪 - 心率与血氧饱和度检测,血压测量仪软件
Blood Oxygen Level-DependentBOLD BOLD imaging is a version of magnetic resonance imaging that depends on the different magnetic properties of oxygenated versus deoxygenated hemoglobin and thus, indirectly, on variations in...doi:10.1007/978-0-387-79948-3_10John Whyte...
原理:由于血液中Hb在与氧结合成HbO2时磁矩和顺磁性均下降,而去氧后变成dHb,具有顺磁效应可导致血管内外出现非均匀性磁场,使T2*缩短,MR信号减小。因而利用快速梯..
CO2 blood oxygen level-dependent MR mapping of cerebrovascular reserve in a clinical population: safety, tolerability, and technical feasibility. PURPOSE: To evaluate the safety, tolerability, and technical feasibility of mapping cerebrovascular reactivity (CVR) in a clinical population by using a pr.....
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