Real-time 2-d phased array vector flow imaging

Simon Holbek; Kristoffer Lindskov Hansen; Nikolaj Fogh; Ramin Moshavegh; Jacob Bjerring Olesen; Michael Bachmann Nielsen; Jorgen Arendt Jensen

doi:10.1109/TUFFC.2018.2838518

Real-time 2-d phased array vector flow imaging

Simon Holbek^*, Kristoffer Lindskov Hansen, Nikolaj Fogh, Ramin Moshavegh, Jacob Bjerring Olesen, Michael Bachmann Nielsen, Jorgen Arendt Jensen

^*Corresponding author for this work

Department of Clinical Medicine

3 Citations (Scopus)

Abstract

Echocardiography examination of the blood flow is currently either restricted to 1-D techniques in real-time or experimental offline 2-D methods. This paper presents an implementation of transverse oscillation for real-time 2-D vector flow imaging (VFI) on a commercial BK Ultrasound scanner. A large field-of-view (FOV) sequence for studying flow dynamics at 11 frames per second (fps) and a sequence for studying peak systolic velocities (PSVs) with a narrow FOV at 36 fps were validated. The VFI sequences were validated in a flow rig with continuous laminar parabolic flow and in a pulsating flow pump system before being tested in vivo, where measurements were obtained on two healthy volunteers. Mean PSV from 11 cycles was 155 cms^-1 with a precision of ±9.0% for the pulsating flow pump. In vivo, PSV estimated in the ascending aorta was 135 cms^-1 ± 16.9% for eight cardiac cycles. Furthermore, in vivo flow dynamics of the left ventricle and in the ascending aorta were visualized. In conclusion, angle independent 2-D VFI on a phased array has been implemented in real time, and it is capable of providing quantitative and qualitative flow evaluations of both the complex and fully transverse flow.

Original language	English
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	65
Issue number	7
Pages (from-to)	1205-1213
Number of pages	9
ISSN	0885-3010
DOIs	https://doi.org/10.1109/TUFFC.2018.2838518
Publication status	Published - 2018

Keywords

3-D vector flow
blood velocity estimation
transverse oscillation

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10.1109/TUFFC.2018.2838518

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title = "Real-time 2-d phased array vector flow imaging",

abstract = "Echocardiography examination of the blood flow is currently either restricted to 1-D techniques in real-time or experimental offline 2-D methods. This paper presents an implementation of transverse oscillation for real-time 2-D vector flow imaging (VFI) on a commercial BK Ultrasound scanner. A large field-of-view (FOV) sequence for studying flow dynamics at 11 frames per second (fps) and a sequence for studying peak systolic velocities (PSVs) with a narrow FOV at 36 fps were validated. The VFI sequences were validated in a flow rig with continuous laminar parabolic flow and in a pulsating flow pump system before being tested in vivo, where measurements were obtained on two healthy volunteers. Mean PSV from 11 cycles was 155 cms-1 with a precision of ±9.0% for the pulsating flow pump. In vivo, PSV estimated in the ascending aorta was 135 cms-1 ± 16.9% for eight cardiac cycles. Furthermore, in vivo flow dynamics of the left ventricle and in the ascending aorta were visualized. In conclusion, angle independent 2-D VFI on a phased array has been implemented in real time, and it is capable of providing quantitative and qualitative flow evaluations of both the complex and fully transverse flow.",

keywords = "3-D vector flow, blood velocity estimation, transverse oscillation",

author = "Simon Holbek and Hansen, {Kristoffer Lindskov} and Nikolaj Fogh and Ramin Moshavegh and Olesen, {Jacob Bjerring} and Nielsen, {Michael Bachmann} and Jensen, {Jorgen Arendt}",

year = "2018",

doi = "10.1109/TUFFC.2018.2838518",

language = "English",

volume = "65",

pages = "1205--1213",

journal = "I E E E Transactions on Ultrasonics, Ferroelectrics and Frequency Control",

issn = "0885-3010",

publisher = "Institute of Electrical and Electronics Engineers",

number = "7",

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T1 - Real-time 2-d phased array vector flow imaging

AU - Holbek, Simon

AU - Hansen, Kristoffer Lindskov

AU - Fogh, Nikolaj

AU - Moshavegh, Ramin

AU - Olesen, Jacob Bjerring

AU - Nielsen, Michael Bachmann

AU - Jensen, Jorgen Arendt

PY - 2018

Y1 - 2018

N2 - Echocardiography examination of the blood flow is currently either restricted to 1-D techniques in real-time or experimental offline 2-D methods. This paper presents an implementation of transverse oscillation for real-time 2-D vector flow imaging (VFI) on a commercial BK Ultrasound scanner. A large field-of-view (FOV) sequence for studying flow dynamics at 11 frames per second (fps) and a sequence for studying peak systolic velocities (PSVs) with a narrow FOV at 36 fps were validated. The VFI sequences were validated in a flow rig with continuous laminar parabolic flow and in a pulsating flow pump system before being tested in vivo, where measurements were obtained on two healthy volunteers. Mean PSV from 11 cycles was 155 cms-1 with a precision of ±9.0% for the pulsating flow pump. In vivo, PSV estimated in the ascending aorta was 135 cms-1 ± 16.9% for eight cardiac cycles. Furthermore, in vivo flow dynamics of the left ventricle and in the ascending aorta were visualized. In conclusion, angle independent 2-D VFI on a phased array has been implemented in real time, and it is capable of providing quantitative and qualitative flow evaluations of both the complex and fully transverse flow.

AB - Echocardiography examination of the blood flow is currently either restricted to 1-D techniques in real-time or experimental offline 2-D methods. This paper presents an implementation of transverse oscillation for real-time 2-D vector flow imaging (VFI) on a commercial BK Ultrasound scanner. A large field-of-view (FOV) sequence for studying flow dynamics at 11 frames per second (fps) and a sequence for studying peak systolic velocities (PSVs) with a narrow FOV at 36 fps were validated. The VFI sequences were validated in a flow rig with continuous laminar parabolic flow and in a pulsating flow pump system before being tested in vivo, where measurements were obtained on two healthy volunteers. Mean PSV from 11 cycles was 155 cms-1 with a precision of ±9.0% for the pulsating flow pump. In vivo, PSV estimated in the ascending aorta was 135 cms-1 ± 16.9% for eight cardiac cycles. Furthermore, in vivo flow dynamics of the left ventricle and in the ascending aorta were visualized. In conclusion, angle independent 2-D VFI on a phased array has been implemented in real time, and it is capable of providing quantitative and qualitative flow evaluations of both the complex and fully transverse flow.

KW - 3-D vector flow

KW - blood velocity estimation

KW - transverse oscillation

U2 - 10.1109/TUFFC.2018.2838518

DO - 10.1109/TUFFC.2018.2838518

M3 - Journal article

C2 - 29993373

AN - SCOPUS:85047205927

SN - 0885-3010

VL - 65

SP - 1205

EP - 1213

JO - I E E E Transactions on Ultrasonics, Ferroelectrics and Frequency Control

JF - I E E E Transactions on Ultrasonics, Ferroelectrics and Frequency Control

IS - 7

ER -

Real-time 2-d phased array vector flow imaging

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Keywords

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