### Abstract

^{2 }for matrix probes. A 62+62 RC probe has four times larger surface area and one-eighth of the channel count when compared to the same-pitch fully populated 32x32 matrix probe. This research investigates the performance of such a prototype array for volumetric Synthetic Aperture (SA) B-mode and vector flow imaging using defocused waves. An interleaved SA sequence was implemented on the SARUS scanner using a 3 MHz,

*λ*/2-pitch 62+62 RC piezoelectric probe. The sequence contains repeated emissions with rows and columns interleaved with B-mode emissions. The sequence contains 80 emissions in total and can provide a volume rate above 125 Hz yielding continuous data. Velocities were estimated using the Directional Transverse Oscillation Cross-Correlation method. Measurements were made on a circulating flow rig with a parabolic profile with a peak velocity of 0.25 m/s and beam-to-flow angle of 90º, and two different rotation angles (0º, 45º). Results showed a maximum bias of -17.5% and a standard deviation of 3.9%. A second setup used a tissue mimicking phantom with pulsating flow showing full volumetric flow estimated using the method. The flow was visualized in the entire rectilinear volume at once, with B-mode planes selectable in the entire region. This was attained using only 62 channels in receive making full volumetric imaging and velocity estimation implementable on current scanner hardware.

Original language | English |
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Title of host publication | Proceedings of 2019 IEEE International Ultrasonics Symposium |

Publisher | IEEE |

Publication date | 2019 |

Pages | 864-867 |

ISBN (Electronic) | 978-1-7281-4596-9 |

DOIs | |

Publication status | Published - 2019 |

Event | 2019 IEEE International Ultrasonics Symposium - SEC Glasgow, Glasgow, United Kingdom Duration: 6 Oct 2019 → 9 Oct 2019 http://attend.ieee.org/ius-2019/ |

### Conference

Conference | 2019 IEEE International Ultrasonics Symposium |
---|---|

Location | SEC Glasgow |

Country | United Kingdom |

City | Glasgow |

Period | 06/10/2019 → 09/10/2019 |

Internet address |

### Cite this

*Proceedings of 2019 IEEE International Ultrasonics Symposium*(pp. 864-867). IEEE. https://doi.org/10.1109/ULTSYM.2019.8925885

}

*Proceedings of 2019 IEEE International Ultrasonics Symposium.*IEEE, pp. 864-867, 2019 IEEE International Ultrasonics Symposium, Glasgow, United Kingdom, 06/10/2019. https://doi.org/10.1109/ULTSYM.2019.8925885

**Full Volumetric 3-D Vector Flow Imaging Using a 62+62 Row-Column Array.** / Schou, Mikkel; Jørgensen, Lasse Thurmann; Stuart, Matthias Bo; Traberg, Marie Sand; Tomov, Borislav Gueorguiev; Jensen, Jørgen Arendt.

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

TY - GEN

T1 - Full Volumetric 3-D Vector Flow Imaging Using a 62+62 Row-Column Array

AU - Schou, Mikkel

AU - Jørgensen, Lasse Thurmann

AU - Stuart, Matthias Bo

AU - Traberg, Marie Sand

AU - Tomov, Borislav Gueorguiev

AU - Jensen, Jørgen Arendt

PY - 2019

Y1 - 2019

N2 - Row Column (RC) Arrays can produce highresolution 3-D volumetric images with only 2N interconnections compared to N2 for matrix probes. A 62+62 RC probe has four times larger surface area and one-eighth of the channel count when compared to the same-pitch fully populated 32x32 matrix probe. This research investigates the performance of such a prototype array for volumetric Synthetic Aperture (SA) B-mode and vector flow imaging using defocused waves. An interleaved SA sequence was implemented on the SARUS scanner using a 3 MHz, λ/2-pitch 62+62 RC piezoelectric probe. The sequence contains repeated emissions with rows and columns interleaved with B-mode emissions. The sequence contains 80 emissions in total and can provide a volume rate above 125 Hz yielding continuous data. Velocities were estimated using the Directional Transverse Oscillation Cross-Correlation method. Measurements were made on a circulating flow rig with a parabolic profile with a peak velocity of 0.25 m/s and beam-to-flow angle of 90º, and two different rotation angles (0º, 45º). Results showed a maximum bias of -17.5% and a standard deviation of 3.9%. A second setup used a tissue mimicking phantom with pulsating flow showing full volumetric flow estimated using the method. The flow was visualized in the entire rectilinear volume at once, with B-mode planes selectable in the entire region. This was attained using only 62 channels in receive making full volumetric imaging and velocity estimation implementable on current scanner hardware.

AB - Row Column (RC) Arrays can produce highresolution 3-D volumetric images with only 2N interconnections compared to N2 for matrix probes. A 62+62 RC probe has four times larger surface area and one-eighth of the channel count when compared to the same-pitch fully populated 32x32 matrix probe. This research investigates the performance of such a prototype array for volumetric Synthetic Aperture (SA) B-mode and vector flow imaging using defocused waves. An interleaved SA sequence was implemented on the SARUS scanner using a 3 MHz, λ/2-pitch 62+62 RC piezoelectric probe. The sequence contains repeated emissions with rows and columns interleaved with B-mode emissions. The sequence contains 80 emissions in total and can provide a volume rate above 125 Hz yielding continuous data. Velocities were estimated using the Directional Transverse Oscillation Cross-Correlation method. Measurements were made on a circulating flow rig with a parabolic profile with a peak velocity of 0.25 m/s and beam-to-flow angle of 90º, and two different rotation angles (0º, 45º). Results showed a maximum bias of -17.5% and a standard deviation of 3.9%. A second setup used a tissue mimicking phantom with pulsating flow showing full volumetric flow estimated using the method. The flow was visualized in the entire rectilinear volume at once, with B-mode planes selectable in the entire region. This was attained using only 62 channels in receive making full volumetric imaging and velocity estimation implementable on current scanner hardware.

U2 - 10.1109/ULTSYM.2019.8925885

DO - 10.1109/ULTSYM.2019.8925885

M3 - Article in proceedings

SP - 864

EP - 867

BT - Proceedings of 2019 IEEE International Ultrasonics Symposium

PB - IEEE

ER -