Transverse correlation: An efficient transverse flow estimator - initial results

Iben Kraglund Holfort, Lasse Henze, Jacob Kortbek, Jørgen Arendt Jensen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

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Abstract

Color flow mapping has become an important clinical tool, for diagnosing a wide range of vascular diseases. Only the velocity component along the ultrasonic beam is estimated, so to find the actual blood velocity, the beam to flow angle has to be known. Because of the unpredictable nature of vascular hemodynamics, the flow angle cannot easily be found as the angle is temporally and spatially variant. Additionally the precision of traditional methods is severely lowered for high flow angles, and they breakdown for a purely transverse flow. To overcome these problems we propose a new method for estimating the transverse velocity component. The method measures the transverse velocity component by estimating the transit time of the blood between two parallel lines beamformed in receive. The method has been investigated using simulations performed with Field II. Using 15 emissions per estimate, a standard deviation of 1.64% and a bias of 1.13% are obtained for a beam to flow angle of 90 degrees. Using the same setup a standard deviation of 2.21% and a bias of 1.07% are obtained for a beam to flow angle of 75 degrees. Using 20 emissions a standard deviation of 3.4% and a bias of 2.06% are obtained at 45 degrees. The method performs stable down to a signal-to-noise ratio of 0 dB, where a standard deviation of 5.5% and a bias of 1.2% is achieved.
Original languageEnglish
Title of host publication2008 IEEE Ultrasonics Symposium
Volume1-4
PublisherIEEE
Publication date2008
Pages1619-1622
ISBN (Print)978-1-4244-2428-3
DOIs
Publication statusPublished - 2008
Event2008 IEEE International Ultrasonics Symposium - Beijing, China
Duration: 2 Nov 20085 Nov 2008
http://ewh.ieee.org/conf/ius_2008/

Conference

Conference2008 IEEE International Ultrasonics Symposium
CountryChina
CityBeijing
Period02/11/200805/11/2008
Internet address
SeriesI E E E International Ultrasonics Symposium. Proceedings
ISSN1051-0117

Bibliographical note

Copyright: 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

Cite this

Holfort, I. K., Henze, L., Kortbek, J., & Jensen, J. A. (2008). Transverse correlation: An efficient transverse flow estimator - initial results. In 2008 IEEE Ultrasonics Symposium (Vol. 1-4, pp. 1619-1622). IEEE. I E E E International Ultrasonics Symposium. Proceedings https://doi.org/10.1109/ULTSYM.2008.0395
Holfort, Iben Kraglund ; Henze, Lasse ; Kortbek, Jacob ; Jensen, Jørgen Arendt. / Transverse correlation: An efficient transverse flow estimator - initial results. 2008 IEEE Ultrasonics Symposium. Vol. 1-4 IEEE, 2008. pp. 1619-1622 (I E E E International Ultrasonics Symposium. Proceedings).
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abstract = "Color flow mapping has become an important clinical tool, for diagnosing a wide range of vascular diseases. Only the velocity component along the ultrasonic beam is estimated, so to find the actual blood velocity, the beam to flow angle has to be known. Because of the unpredictable nature of vascular hemodynamics, the flow angle cannot easily be found as the angle is temporally and spatially variant. Additionally the precision of traditional methods is severely lowered for high flow angles, and they breakdown for a purely transverse flow. To overcome these problems we propose a new method for estimating the transverse velocity component. The method measures the transverse velocity component by estimating the transit time of the blood between two parallel lines beamformed in receive. The method has been investigated using simulations performed with Field II. Using 15 emissions per estimate, a standard deviation of 1.64{\%} and a bias of 1.13{\%} are obtained for a beam to flow angle of 90 degrees. Using the same setup a standard deviation of 2.21{\%} and a bias of 1.07{\%} are obtained for a beam to flow angle of 75 degrees. Using 20 emissions a standard deviation of 3.4{\%} and a bias of 2.06{\%} are obtained at 45 degrees. The method performs stable down to a signal-to-noise ratio of 0 dB, where a standard deviation of 5.5{\%} and a bias of 1.2{\%} is achieved.",
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Holfort, IK, Henze, L, Kortbek, J & Jensen, JA 2008, Transverse correlation: An efficient transverse flow estimator - initial results. in 2008 IEEE Ultrasonics Symposium. vol. 1-4, IEEE, I E E E International Ultrasonics Symposium. Proceedings, pp. 1619-1622, 2008 IEEE International Ultrasonics Symposium, Beijing, China, 02/11/2008. https://doi.org/10.1109/ULTSYM.2008.0395

Transverse correlation: An efficient transverse flow estimator - initial results. / Holfort, Iben Kraglund; Henze, Lasse; Kortbek, Jacob; Jensen, Jørgen Arendt.

2008 IEEE Ultrasonics Symposium. Vol. 1-4 IEEE, 2008. p. 1619-1622 (I E E E International Ultrasonics Symposium. Proceedings).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

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N1 - Copyright: 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

PY - 2008

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N2 - Color flow mapping has become an important clinical tool, for diagnosing a wide range of vascular diseases. Only the velocity component along the ultrasonic beam is estimated, so to find the actual blood velocity, the beam to flow angle has to be known. Because of the unpredictable nature of vascular hemodynamics, the flow angle cannot easily be found as the angle is temporally and spatially variant. Additionally the precision of traditional methods is severely lowered for high flow angles, and they breakdown for a purely transverse flow. To overcome these problems we propose a new method for estimating the transverse velocity component. The method measures the transverse velocity component by estimating the transit time of the blood between two parallel lines beamformed in receive. The method has been investigated using simulations performed with Field II. Using 15 emissions per estimate, a standard deviation of 1.64% and a bias of 1.13% are obtained for a beam to flow angle of 90 degrees. Using the same setup a standard deviation of 2.21% and a bias of 1.07% are obtained for a beam to flow angle of 75 degrees. Using 20 emissions a standard deviation of 3.4% and a bias of 2.06% are obtained at 45 degrees. The method performs stable down to a signal-to-noise ratio of 0 dB, where a standard deviation of 5.5% and a bias of 1.2% is achieved.

AB - Color flow mapping has become an important clinical tool, for diagnosing a wide range of vascular diseases. Only the velocity component along the ultrasonic beam is estimated, so to find the actual blood velocity, the beam to flow angle has to be known. Because of the unpredictable nature of vascular hemodynamics, the flow angle cannot easily be found as the angle is temporally and spatially variant. Additionally the precision of traditional methods is severely lowered for high flow angles, and they breakdown for a purely transverse flow. To overcome these problems we propose a new method for estimating the transverse velocity component. The method measures the transverse velocity component by estimating the transit time of the blood between two parallel lines beamformed in receive. The method has been investigated using simulations performed with Field II. Using 15 emissions per estimate, a standard deviation of 1.64% and a bias of 1.13% are obtained for a beam to flow angle of 90 degrees. Using the same setup a standard deviation of 2.21% and a bias of 1.07% are obtained for a beam to flow angle of 75 degrees. Using 20 emissions a standard deviation of 3.4% and a bias of 2.06% are obtained at 45 degrees. The method performs stable down to a signal-to-noise ratio of 0 dB, where a standard deviation of 5.5% and a bias of 1.2% is achieved.

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M3 - Article in proceedings

SN - 978-1-4244-2428-3

VL - 1-4

SP - 1619

EP - 1622

BT - 2008 IEEE Ultrasonics Symposium

PB - IEEE

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Holfort IK, Henze L, Kortbek J, Jensen JA. Transverse correlation: An efficient transverse flow estimator - initial results. In 2008 IEEE Ultrasonics Symposium. Vol. 1-4. IEEE. 2008. p. 1619-1622. (I E E E International Ultrasonics Symposium. Proceedings). https://doi.org/10.1109/ULTSYM.2008.0395