Measurement of Flow Volume in the Presence of Reverse Flow with Ultrasound Speckle Decorrelation

Autor: Meng-Xing Tang, Xinhuan Zhou, Xiaowei Zhou, Chee Hau Leow
Přispěvatelé: British Heart Foundation
Rok vydání: 2019
Předmět:
Technology
Acoustics and Ultrasonics
030204 cardiovascular system & hematology
01 natural sciences
0302 clinical medicine
010301 acoustics
Ultrasonography
Microbubbles
Radiological and Ultrasound Technology
Phantoms
Imaging
Volumetric flow rate
Radiology
Nuclear Medicine & Medical Imaging
Ultrasound
Models
Cardiovascular
DOPPLER
Transverse plane
Pulsatile Flow
symbols
Current (fluid)
Rheology
Life Sciences & Biomedicine
Doppler effect
Blood Flow Velocity
Materials science
Acoustics
Biophysics
Article
03 medical and health sciences
symbols.namesake
0103 physical sciences
RECONSTRUCTION
Radiology
Nuclear Medicine and imaging
Computer Simulation
Reverse flow
Science & Technology
BLOOD-FLOW
business.industry
ELASTICITY
1103 Clinical Sciences
Blood flow
VELOCITY
QUANTIFICATION
Image Enhancement
3-D flow
FIELDS
Ultrasound imaging velocimetry
Flow velocity
Flow (mathematics)
business
Speckle decorrelation
SYSTEM
Zdroj: Ultrasound in Medicine & Biology
ISSN: 1879-291X
Popis: Direct measurement of volumetric flow rate in the cardiovascular system with ultrasound is valuable but has been a challenge because most current 2-D flow imaging techniques are only able to estimate the flow velocity in the scanning plane (in-plane). Our recent study demonstrated that high frame rate contrast ultrasound and speckle decorrelation (SDC) can be used to accurately measure the speed of flow going through the scanning plane (through-plane). The volumetric flow could then be calculated by integrating over the luminal area, when the blood vessel was scanned from the transverse view. However, a key disadvantage of this SDC method is that it cannot distinguish the direction of the through-plane flow, which limited its applications to blood vessels with unidirectional flow. Physiologic flow in the cardiovascular system could be bidirectional due to its pulsatility, geometric features, or under pathologic situations. In this study, we proposed a method to distinguish the through-plane flow direction by inspecting the flow within the scanning plane from a tilted transverse view. This method was tested on computer simulations and experimental flow phantoms. It was found that the proposed method could detect flow direction and improved the estimation of the flow volume, reducing the overestimation from over 100% to less than 15% when there was flow reversal. This method showed significant improvement over the current SDC method in volume flow estimation and can be applied to a wider range of clinical applications where bidirectional flow exists.
Databáze: OpenAIRE
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