{"doi":"10.1016/j.cmpb.2025.108894","title":"Local phase velocity imaging with wavenumber filter banks for ultrasound shear wave elastography","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.","journal":"Computer Methods and Programs in Biomedicine","year":2025,"id":521352,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":5,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9619,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":360687,"name":"Matthew W. Urban","orcid":"0000-0003-1360-4287","position":1,"is_corresponding":false},{"id":404722,"name":"Piotr Kijanka","orcid":"0000-0001-6086-3420","position":2,"is_corresponding":false},{"id":1391663,"name":"Ramin Almasi","orcid":"0000-0002-6726-548X","position":0,"is_corresponding":true}],"reference_count":62,"raw_metadata":null,"created_at":"2026-07-19T02:49:44.558743Z","pmid":"40505200","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}