Comparison of Phase-Screen and Geometry-Based Phase Aberration Correction Techniques for Real-Time Transcranial Ultrasound Imaging
نویسندگان
چکیده
While transcranial ultrasound imaging is a promising diagnostic modality, it still hindered due to phase aberration and multiple scattering caused by the skull. In this paper, we compare near-field phase-screen modeling (PS) geometry-based correction technique (GB) when an ultrafast sequence (five plane waves tilted from −15 +15 degrees in cutaneous tissue layer) used for data acquisition. With simulation data, profile (AP) of two aberrator models (flat realistic temporal bone) was estimated five isoplanatic patches, while wave-speed brain surrounding point targets either modeled homogeneously (ideal) or slightly heterogeneously generate speckle (for mimicking more tissue). For experiment, phased array P4-1 transducer image wire phantom; 4.2-mm-thick bone-mimicking plate placed front probe. The AP three patches. numerical results indicate that, all scatterers are detectable reconstructed GB method, many not detected with PS method dataset estimation generated bone model heterogeneous tissue. experimental show that increases signal-to-clutter ratio (SCR) 7.5 dB 6.5 compared conventional reconstruction methods, respectively. reduces axial/lateral localization error 1.97/0.66 mm 2.08/0.7 reconstruction, lateral spatial resolution (full-width-half-maximum) also improved 0.1 1.06 Our comparison study suggests outperforms multi-angle wave single transducer.
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ژورنال
عنوان ژورنال: Applied sciences
سال: 2022
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app121910183