Ultrasonic testing has been used for many decades, proving itself very efficient detecting defects in industrial sectors. The desire to apply ultrasonic geometrically complex structures, and anisotropic, inhomogeneous materials, together with the advent of more powerful electronics software, is constantly pushing applicability waves their limits. General ray tracing models, suitable calculating...

In order to improve the accuracy of ultrasonic phased array focusing time delay, analyzing the original interpolation Cascade-Integrator-Comb (CIC) filter, an 8× interpolation CIC filter parallel algorithm was proposed, so that interpolation and multichannel decomposition can simultaneously process. Moreover, we summarized the general formula of arbitrary multiple interpolation CIC filter paral...

Focusing beyond the acoustic diffraction limit has always been expected, especially in imaging and ultrasonic therapy. Manipulating waves offers an alternative application potential high-resolution medical ultrasound diagnosis treatment. Here, a two-dimensional circular meta-lens is presented, with sub-wavelength Helmholtz resonator array to implement super-diffraction focusing. The proposed co...

Total-focusing imaging based on full-matrix data, which makes the synthesis of sound waves at focus point, has been widely used and shown to improve resolution effectively. In traditional total-focusing imaging, it is considered that echo signals received by all transmit–receive pairs contain effective characteristic information from focal point. However, both acoustic theory detection experime...

Purpose: The aim of this study was to evaluate the split-crest technique with ultrasonic bone surgery for implant placement in patients with narrow ridges, focusing on the status of soft and hard tissues and on implant success rate, at least 6 months after implant loading. Materials and Methods: During September 2007 and November 2008, 15 patients received 37 implants (BTI implants) with split-...