Devices, systems, and methods for ultrasonically acquiring far-field and near-field images within a body are disclosed. An ultrasound imaging device adapted for insertion within a body includes a first ultrasonic sensor configured to transmit ultrasonic waves at a first frequency for acquiring far-...
Fast computation of far-field pulse-echo PSF of arbitrary arrays for large sparse 2-D ultrasound array design 2018, Ultrasonics Citation Excerpt : Therefore, in many researches [11,12] narrowband beam pattern (BP) has been chosen as the evaluation tool for designing narrowband arrays of antennas...
A parametric speaker is a device for generating and focusing highly directional sound beams. It is essentially a by-product that comes with the nonlinearity of ultrasound. It is noteworthy that this directional beam was controlled and utilized mostly for far-field applications in the past. We empi...
Researchers at the University of Toronto have developed a new distance-mapping principle that delivers automatic real-time focus of both near- and far-field images, simultaneously and in high resolution. Called the Omni-focus Video Camera, it is described as a “breakthrough in video camera ...
Time-Domain Optimized Near-Field Estimator for Ultrasound Imaging: Initial Development and Results For nearly four decades, adaptive beamforming (ABF) algorithms have been applied in RADAR and SONAR signal processing. These algorithms reduce the contribu... F Viola,MA Ellis,WF Walker - 《IEEE Tran...
The motion of a bubble near the free surface is solved by the boundary element method based on the linear wave equation, and the influence of fluid compressibility on bubble dynamics is analyzed. Based on the solution of the bubble motion, the far-field radiation noise induced by the bubble ...
The 10 MHz ultrasonic near-field: calculations, hydrophone and optical diffraction tomography measurements The near-field from a 10 MHz ultrasound transducer has been studied using three different techniques; theoretical calculations, miniature hydrophone measur... R Eriksson,A Holm,M Landeborg,... -...
and compared with ordinary ultrasound imaging, PA imaging has better tissue contrast, thus representing a complementary imaging modality27,28. More interestingly, PA imaging in the second near-infrared (NIR-II, 1000–1700 nm) window has been developed very recently. In particular, the spectral ...
f Bouncing frequency dependent on the laser power and bubble radius, lines for the theory, and dots for the experiments. g The numerical simulation conforming the bouncing bubble and revealing the related velocity field. The white dash line for the location of TIL. The error bars of the data...
The formation of an occlusive thrombus in the blood vessel is the main culprit for numerous life-threatening cardiovascular diseases that represent the leading cause of morbidity and mortality worldwide. Herein, we develop a polymer nanoplatform that int