BOLD signal physiology: Models and applications

被引:53
|
作者
Gauthier, C. J. [1 ]
Fan, A. P. [2 ]
机构
[1] Concordia Univ, Montreal, PQ, Canada
[2] Stanford Univ, Stanford, CA 94305 USA
关键词
CEREBRAL-BLOOD-FLOW; OXYGEN EXTRACTION FRACTION; POSITRON-EMISSION-TOMOGRAPHY; LEVEL-DEPENDENT MRI; METABOLIC-RATE; BRAIN OXYGENATION; CARBON-DIOXIDE; FUNCTIONAL MRI; QUANTITATIVE MEASUREMENTS; HEMOGLOBIN CONCENTRATION;
D O I
10.1016/j.neuroimage.2018.03.018
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The BOLD contrast mechanism has a complex relationship with functional brain activity, oxygen metabolism, and neurovascular factors. Accurate interpretation of the BOLD signal for neuroscience and clinical applications necessitates a clear understanding of the sources of BOLD contrast and its relationship to underlying physiology. This review describes the physiological components that contribute to the BOLD signal and the steady-state calibrated BOLD models that enable quantification of functional changes with a separate challenge paradigm. The principles derived from these biophysical models are then used to interpret BOLD measurements in different neurological disorders in the presence of confounding vascular factors related to disease.
引用
收藏
页码:116 / 127
页数:12
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