Ahmet Tuysuzoglu, Jonathan M. Kracht, Müjdat Çetin, Robin Cleveland, W. Clem Karl
Journal of the Acoustical Society of America, vol. 131, no.2, pp. 1271-1281, February 2012.
An image formation framework for ultrasound imaging from synthetic transducer arrays based on sparsity-driven regularization functionals using single-frequency Fourier domain data is proposed. The framework involves the use of a physics-based forward model of the ultrasound observation process, the formulation of image formation as the solution of an associated optimization problem, and the solution of that problem through eﬃcient numerical algorithms. The sparsity-driven, model-based approach estimates a complex-valued reﬂectivity ﬁeld and preserves physical features in the scene while suppressing spurious artifacts. It also provides robust reconstructions in the case of sparse and reduced observation apertures. The effectiveness of the proposed imaging strategy is demonstrated using experimental data.