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The development of real-time 3-D underwater imaging is restricted by the huge hardware cost and the computational burden associated with a large number of transducers. In this paper, a low-complexity real-time 3-D sonar imaging system with a cross array is proposed. The low complexity, in both hardware cost and computational load, is achieved by an innovative method of signal processing in the far...
Image-guide high-intensity focused ultrasound (HIFU) has been widely used in the treatment of uterine fibroids. However, before HIFU system is ready for use, the targeting accuracy should be known for the safety of important abdominal organs surrounding the target. Researchers have used magnetic resonance (MR) images or computed tomography (CT) to evaluate the targeting accuracy of current MR-guided...
The computational load is prohibitive in 3D sonar systems for real-time image generation. In the literature, an efficient frequency beamforming method based on the distributed and parallel subarray (DPS) has been introduced for planar arrays working in the far field. This paper extends the DPS beamforming algorithm to process the signals acquired from a scene in the near field. The alogrithm divides...
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