Measurement of Volumetric Flow

Direct volumetric blood flow measurement in coronary arteries by thermodilution.

OBJECTIVES This study sought to validate a new method for direct volumetric blood flow measurement in coronary arteries in animals and in conscious humans during cardiac catheterization. BACKGROUND Direct volumetric measurement of blood flow in selective coronary arteries would be useful for studying the coronary circulation. METHODS Based on the principle of thermodilution with continuous ...

Three-dimensional Optical Flow Method for Measurement of Volumetric Brain Deformation from Intraoperative Magnetic Resonance Images

Measurement of Microsphere Concentration Using a Flow Cytometer with Volumetric Sample Delivery

Microsphere concentrations are needed to assign equivalent reference fluorophores (ERF) units to microspheres used in quantitative flow cytometry. A flow cytometer with a syringe based sample delivery system was evaluated for the measurement of the concentration of microspheres contained in a vial of lyophilized microspheres certified by BD Biosciences to contain 50,600 microspheres. The concen...

Quantification of coronary microvascular resistance using angiographic images for volumetric blood flow measurement: in vivo validation.

Structural coronary microcirculation abnormalities are important prognostic determinants in clinical settings. However, an assessment of microvascular resistance (MR) requires a velocity wire. A first-pass distribution analysis technique to measure volumetric blood flow has been previously validated. The aim of this study was the in vivo validation of the MR measurement technique using first-pa...

In vivo label-free measurement of lymph flow velocity and volumetric flow rates using Doppler optical coherence tomography

Direct in vivo imaging of lymph flow is key to understanding lymphatic system function in normal and disease states. Optical microscopy techniques provide the resolution required for these measurements, but existing optical techniques for measuring lymph flow require complex protocols and provide limited temporal resolution. Here, we describe a Doppler optical coherence tomography platform that...