Ultrasound breast imaging using frequency domain reverse time migration
| Autor: | Olivier Roy, R. G. Pratt, Neb Duric, M. A. H. Zuberi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Computer science
Wave propagation Breast imaging Pulse (signal processing) business.industry Acoustics ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Seismic migration 01 natural sciences Imaging phantom 030218 nuclear medicine & medical imaging Ultrasound Tomography 010309 optics 03 medical and health sciences 0302 clinical medicine Signal-to-noise ratio Optics Frequency domain Speed of sound 0103 physical sciences Center frequency business Image restoration |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2218366 |
| Popis: | Conventional ultrasonography reconstruction techniques, such as B-mode, are based on a simple wave propagation model derived from a high frequency approximation. Therefore, to minimize model mismatch, the central frequency of the input pulse is typically chosen between 3 and 15 megahertz. Despite the increase in theoretical resolution, operating at higher frequencies comes at the cost of lower signal-to-noise ratio. This ultimately degrades the image contrast and overall quality at higher imaging depths. To address this issue, we investigate a reflection imaging technique, known as reverse time migration, which uses a more accurate propagation model for reconstruction. We present preliminary simulation results as well as physical phantom image reconstructions obtained using data acquired with a breast imaging ultrasound tomography prototype. The original reconstructions are filtered to remove low-wavenumber artifacts that arise due to the inclusion of the direct arrivals. We demonstrate the advantage of using an accurate sound speed model in the reverse time migration process. We also explain how the increase in computational complexity can be mitigated using a frequency domain approach and a parallel computing platform. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|