Volumetric acoustic imaging is desirable for the visualization of underwater objects and
structures; however, the implementation of a volumetric imaging system is difficult due to the …

Real-time three-dimensional acoustic imaging is difficult in water or tissue because of the
slow speed of sound in these media. Conventional pulse–echo data collection, which uses …

Real-time volumetric ultrasound imaging is difficult due to problems with array construction
and due to the slow speed of data collection. In 1976, a linear amplitude-steered array was …

Very‐high‐frequency ultrasound (VHFU) transducer technology is currently experiencing a
great deal of interest. Traditionally, researchers have used single‐element transducers …

In 1976, Hughes and Thompson introduced the idea of steering the maximum response of a
linear array by amplitude weighting the output signals of the elements, thus eliminating the …

The problem of imaging with an annular array of transducers by employing all pairs of
transducer elements around the circumference of the annulus as transmitters and receivers …

Time reversal permits acoustic focusing and beam forming in inhomogeneous and/or high-
scattering environments. A volumetric array geometry can suppress back lobes and can fit a …

The extension of acoustic holography to uncontrolled media outside the laboratory requires
rapid scan of a large hologram surface. A system employing crossed linear arrays, one …

A synthetic-aperture acoustic imaging system has been developed which employs digital
electronics to perform real-time imaging with a 32-element acoustic transducer array. This …

The design and testing of a 5-ring, focused annular array is presented. The array has a total
aperture of 6 mm, a geometric focus of 12 mm, and a nominal center frequency of 40 MHz …