Blood Flow Quantification
Blood Flow Quantification - Related Videos
03:38
Developing a Cerebral Blood Flow Atlas for Blood Flow Mapping
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2025
Source: Tan, Z., et al., Construction and Application of Cerebral Functional Region-Based Cerebral Blood Flow Atlas Using Magnetic Resonance Imaging-Arterial Spin Labeling. J. Vis. Exp. (2024).This video demonstrates the method to construct a cerebral blood flow atlas by integrating magnetic resonance imaging or MRI-arterial spin labeling data with segmented brain regions, visualizing blood flow patterns, and quantifying flow levels across functional areas.
08:38
Quantification of the Immunosuppressant Tacrolimus on Dried Blood Spots Using LC-MS/MS
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Cited by 28 •
2015
Here we describe a high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) assay to quantify the immunosuppressant tacrolimus in dried blood spots using a simple manual protein precipitation step and online column extraction.
01:29
Blood Flow
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2025
Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow. Slow...
06:56
Human Fetal Blood Flow Quantification with Magnetic Resonance Imaging and Motion Compensation
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Cited by 4 •
2021
Here we present a protocol for measuring fetal blood flow rapidly with MRI and retrospectively performing motion correction and cardiac gating.
08:18
Design and Use of a Full Flow Sampling System (FFS) for the Quantification of Methane Emissions
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Cited by 13 •
2016
We have designed, developed, and implemented a novel full flow sampling system (FFS) for quantification of methane emissions and greenhouse gases from across the natural gas supply chain.
FAQs
Measurements may be based on detecting red blood cell motion or following an injected tracer or contrast agent as it passes through vessels or tissue. These signals are converted into estimates such as flow, velocity, or tissue perfusion. The chosen signal therefore influences which aspect of circulation can be quantified and how vascular function is characterized.
Flow, velocity, and tissue perfusion describe related but different features of circulation. Flow indicates blood movement through a vascular region, velocity describes movement speed, and perfusion reflects blood delivery within tissue. Separating these measurements helps researchers assess vascular function more precisely and relate circulation to tissue oxygenation or local disease-associated changes.
Inflammation and endothelial activation can alter circulation by changing vascular behavior and promoting leakage. Blood Flow Quantification captures these changes as differences in measured flow or tissue perfusion, allowing vascular effects to be evaluated alongside immune responses. This is important because altered perfusion can influence how immune cells reach infected or inflamed tissues.
Vessel obstruction can reduce circulation, whereas vascular leakage indicates disruption of the normal vascular barrier. Quantifying the resulting changes helps connect local vascular dysfunction with infection-related tissue effects and systemic immune responses. These measurements can also show whether abnormal circulation is associated with impaired delivery to tissue or changing disease severity.
A typical workflow identifies the vessel or tissue of interest, records red blood cell motion or tracks an injected tracer or contrast agent, and analyzes the resulting signal over a defined period. The signal is then converted into flow, velocity, or tissue-perfusion estimates. This sequence provides a quantitative basis for comparing vascular states.
Researchers can apply these measurements when they need to evaluate how infection or inflammation affects circulation, tissue oxygenation, or immune-cell delivery. The approach supports comparisons during disease progression and after treatment. It is especially useful when local vascular changes need to be examined together with broader immune responses rather than assessed independently.
Perfusion measurements show how effectively blood reaches a tissue region, providing context for the movement of immune cells into that site. If inflammation, endothelial activation, leakage, or obstruction changes local circulation, the resulting measurements can help explain altered immune-cell delivery. This links vascular function with the tissue-level organization of an immune response.
Repeated measurements can indicate whether treatment is associated with changes in circulation, tissue perfusion, vascular leakage, or oxygenation. In infection research, those findings can be interpreted alongside disease progression and immune responses. The method therefore provides quantitative vascular outcomes that help assess whether treatment-related changes correspond to improved or altered tissue conditions.