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

Abstract Most low-frequency (< 5 MHz) ultrasound imaging systems are based on multi-
element transducer arrays. Transducer arrays have the ability to optimally focus the …

This is Part I of a series of two papers describing the development of a digital high-
frequency, annular-array, ultrasonic imaging system. In this paper, the design and …

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 …

Ultrasonic imaging is one of the most important and still growing diagnostic tools today.
Ultrasonic imaging is more appealing as a clinical imaging modality compared to such …

Polyvinylidene fluoride (PVDF) transducers have been developed for ultrasonic backscatter
microscopy (UBM) applications. Single element devices encompassed the frequency range …

High-frequency ultrasound (HFU) shows promises for with fine-resolution imaging. However,
the limited depth of field (DOF) and penetration depth of HFU waves mitigates in significance …

High‐frequency ultrasound (HFU) allows fine‐resolution imaging at the expense of limited
depth‐of‐field (DOF) and shallow acoustic penetration. Coded‐excitation imaging allows a …

The advantage of ultrasonic annular arrays over conventional single element transducers
has been in the ability to transmit focus at multiple points throughout the depth of field, as …

The design, fabrication, and performance of miniature high-frequency annular arrays are
described. A 50-MHz, 2-mm-diameter, 7-element, equal-area annular array was fabricated …