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Article Dans Une Revue Ultrasonics Année : 2015

Thomson\textquoterights multitaper approach combined with coherent plane-wave compounding to reduce speckle in ultrasound imaging

Résumé

In ultrasound imaging, the speckle pattern limits the image quality. Spatial and frequency compounding are commonly used to reduce speckle noise or improve the contrast. Although recent implementations can preserve a frame rate that is compatible with real-time imaging (e.g., synthetic aperture compounding), most classic compounding techniques are based on the coherent combination of several radiofrequency images from the same investigated area, which reduces the frame rate. Furthermore, Thomson\textquoterights multitaper approach aims to smooth the speckle by incoherently combining the obtained B-mode images after applying different apodization windows on the same original data. With only one acquisition, the frame rate remains high, but the spatial resolution is decreased. To improve the resolution and contrast while reducing the speckle noise, this paper proposes combining the coherent plane-wave compounding technique (CPWC) with Thomson\textquoterights multitaper method. The resulting multitaper coherent plane-wave compounding (MCPWC) takes advantage of coherent and incoherent approaches. Simulations and experimental results demonstrate that in terms of the signal-to-noise ratio, contrast, and resolution, the image quality is increased using plane wave emissions at approximately ten steering angles with three Thomson\textquoterights tapers. Outside the focal area, the lateral resolution is improved by a factor of 2, and the contrast is increased by approximately 2 dB compared with images obtained using a single focalization technique and Thomson\textquoterights multitaper approach.
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Dates et versions

hal-01986407 , version 1 (18-01-2019)

Identifiants

Citer

M. Toulemonde, O. Basset, P. Tortoli, C. Cachard. Thomson\textquoterights multitaper approach combined with coherent plane-wave compounding to reduce speckle in ultrasound imaging. Ultrasonics, 2015, 56, pp.390-398. ⟨10.1016/j.ultras.2014.09.006⟩. ⟨hal-01986407⟩
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