## Abstract

A row-column beamformation algorithm is presented, which yields the output from the conventional delay-and-sum algorithm while reducing the number of operations by order of magnitude. The proposed method uses that in a row-column synthetic aperture sequence, the low-resolution volumes (LRV) have approximately constant image values along the elevation axis. It is, thus, possible to reconstruct the entire LRV from a single cross-section by modeling the positions with constant image values. As such, the proposed method consists of two stages. The first stage beamforms a low-resolution image per emission using the conventional approach. The second stage reconstructs the LRVs with one interpolation per voxel. Lastly, a high-resolution volume (HRV) is obtained by summing the LRVs across all emissions. The proposed algorithm was evaluated on measured data acquired using a 6 MHz 128+128 Vermon row-column probe and a Verasonics Vantage system. The proposed method beamformed a $100 \times 100 \times 200$ HRV consisting of 48 LRVs at a volume rate of 38 Hz. This was 9.23 times faster than a published GPU implementation of the conventional approach and real-time volumetric beamformation was achieved with a pulse repetition frequency of up to 1805 Hz. The output from the conventional and proposed beamformer was visually indistinguishable, and their point spread function's width heccurate interpolation requiright at -6 dB and -20 dB deviated less than 0.5%. This demonstrates that the number of operations of the conventional row-column beamformer can be significantly reduced with a negligible impact on image quality.

Originalsprog | Engelsk |
---|---|

Titel | 2023 IEEE International Conference on Acoustics, Speech, and Signal Processing Workshops (ICASSPW), |

Forlag | IEEE |

Publikationsdato | 2023 |

Sider | 1- |

ISBN (Trykt) | 979-8-3503-0262-2 |

ISBN (Elektronisk) | 979-8-3503-0261-5 |

DOI | |

Status | Udgivet - 2023 |

Begivenhed | 2023 IEEE International Conference on Acoustics, Speech and Signal Processing Workshops, ICASSPW 2023 - Rhodes Island, Grækenland Varighed: 4 jun. 2023 → 10 jun. 2023 |

### Konference

Konference | 2023 IEEE International Conference on Acoustics, Speech and Signal Processing Workshops, ICASSPW 2023 |
---|---|

Land/Område | Grækenland |

By | Rhodes Island |

Periode | 04/06/2023 → 10/06/2023 |

Sponsor | IEEE, IEEE Signal Processing Society |

### Bibliografisk note

Funding Information:This work was financially supported by European Research Council’s (ERC) Synergy Grant 854796.

Publisher Copyright:

© 2023 IEEE.