### Abstract

Original language | English |
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Title of host publication | 2008 IEEE Ultrasonics Symposium |

Volume | 1-4 |

Publisher | IEEE |

Publication date | 2008 |

Pages | 1619-1622 |

ISBN (Print) | 978-1-4244-2428-3 |

DOIs | |

Publication status | Published - 2008 |

Event | 2008 IEEE International Ultrasonics Symposium - Beijing, China Duration: 2 Nov 2008 → 5 Nov 2008 http://ewh.ieee.org/conf/ius_2008/ |

### Conference

Conference | 2008 IEEE International Ultrasonics Symposium |
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Country | China |

City | Beijing |

Period | 02/11/2008 → 05/11/2008 |

Internet address |

Series | I E E E International Ultrasonics Symposium. Proceedings |
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ISSN | 1051-0117 |

### 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

*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

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*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.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research

TY - GEN

T1 - Transverse correlation: An efficient transverse flow estimator - initial results

AU - Holfort, Iben Kraglund

AU - Henze, Lasse

AU - Kortbek, Jacob

AU - Jensen, Jørgen Arendt

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

Y1 - 2008

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.

U2 - 10.1109/ULTSYM.2008.0395

DO - 10.1109/ULTSYM.2008.0395

M3 - Article in proceedings

SN - 978-1-4244-2428-3

VL - 1-4

SP - 1619

EP - 1622

BT - 2008 IEEE Ultrasonics Symposium

PB - IEEE

ER -