Micro Non-Uniform Linear Array (MNULA) for Ultrasound Plane Wave Imaging

Effects of Non-Elevation-Focalized Linear Array Transducer on Ultrasound Plane-Wave Imaging

Plane-wave ultrasound imaging (PWUS) has become an important method of ultrasound imaging in recent years as its frame rate has exceeded 10,000 frames per second, allowing ultrasound to be used for two-dimensional shear wave detection and functional brain imaging. However, compared to the traditional focusing and scanning method, PWUS images always suffer from a degradation of lateral resolutio...

K-Space analysis for plane-wave ultrasound imaging

Ultrasound imaging can be considered as an inverse scattering problem in which the unknown distribution of the material parameters mass density and compressibility is reconstructed from measurements of scattered waves on the borders around the object. Unfortunately, this inverse problem is mathematically ill-posed and nonlinear: While the wave propagation is considered linear, the mapping of ma...

Focal Plane Array-based Millimeter Wave Imaging Radiometer

A Circular Array for Plane-Wave Synthesis

We analyze a circular array of electric line sources for generating a uniform plane wave in the interior region of the array. Identical results for the synthesized element weightings are obtained using matrix inversion or a Fourier series technique. A physical optics approximation for the element weightings is also presented, hut it yields a much poorer result for the synthesized field. The ang...

Micro-ultrasound for preclinical imaging.

Over the past decade, non-invasive preclinical imaging has emerged as an important tool to facilitate biomedical discovery. Not only have the markets for these tools accelerated, but the numbers of peer-reviewed papers in which imaging end points and biomarkers have been used have grown dramatically. High frequency 'micro-ultrasound' has steadily evolved in the post-genomic era as a rapid, comp...