Szczegóły publikacji
Opis bibliograficzny
Local phase velocity imaging with wavenumber filter banks for ultrasound shear wave elastography / Ramin ALMASI, Matthew W. Urban, Piotr KIJANKA // Computer Methods and Programs in Biomedicine ; ISSN 0169-2607. — 2025 — vol. 269 art. no. 108894, s. 1–20. — Bibliogr. s. 19–20, Abstr. — Publikacja dostępna online od: 2025-06-06
Autorzy (3)
- AGHAlmasi Ramin
- Urban Matthew W.
- AGHKijanka Piotr
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 160646 |
|---|---|
| Data dodania do BaDAP | 2025-07-01 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.cmpb.2025.108894 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Computer Methods and Programs in Biomedicine |
Abstract
Background and objectives: Ultrasound shear wave elastography is a non-invasive imaging technique for the assessment of the mechanical properties of tissues. However, existing techniques may yield erroneous assessments of lesion size or shape, particularly at low frequencies (250-500 Hz). Methods: This study introduces a novel imaging technique, Local Phase Velocity-based Imaging utilizing Wavenumber-domain Bell Filters (LPVI-WBF), which enables the imaging of shear wave velocity in soft tissue at a single low frequency. This approach offers enhanced tissue lateral propagation and more precise stiffness measurements at low frequencies. Operating in the frequency-wavenumber domain, LPVI-WBF employs an adaptive approach that utilizes a custom two-dimensional Fourier transform and its inverse to enhance the phase velocity image smoothness with reduced time complexity and memory usage. In comparison with the original Local Phase Velocity-Based Imaging (LPVI) method, the LPVI-WBF has been demonstrated to reduce bias in phase velocity values at low frequencies (250–500 Hz) for stiffer inclusions which are of considerable significance in clinical contexts. Furthermore, a sliding window is not employed in LPVI-WBF due to the associated complications. In this study, both left-to-right and right-to-left acoustic radiation force pushes are employed to enhance the outcomes of a single push. Results: The results of our experiments with a heterogeneous elastic phantom demonstrate that proposed LPVI-WBF is an effective technique for reconstructing two-dimensional shear wave phase velocity maps with more accurate values and a higher contrast-to-noise ratio between target and background at low frequencies (i.e., below 500 Hz). Moreover, it reduces the processing time and memory usage by 39% and 94%, respectively. Conclusion: This paper proposes a novel method for generating 2-D shear wave phase velocity images, resulting in local phase velocity maps that more accurately reflect the B-mode true shapes and values at low frequencies (i.e. below 500 Hz), as demonstrated by results obtained from inclusion phantoms. Additionally, LPVI-WBF provides a higher contrast-to-noise ratio (CNR) at low frequencies for stiffer inclusions, which are of great importance in clinical applications.
