scholarly journals Frequency-Domain-Based Strain Estimation and High-Frame-Rate Imaging for Quasi-Static Elastography

2012 ◽  
Vol 59 (4) ◽  
pp. 817-824 ◽  
Author(s):  
Alessandro Ramalli ◽  
Olivier Basset ◽  
Christian Cachard ◽  
Enrico Boni ◽  
Piero Tortoli
Keyword(s):  
Frequency Domain ◽  
Frame Rate ◽  
High Frame Rate ◽  
Strain Estimation

Frequency-domain high frame-rate 2D vector flow imaging

2013 ◽  
Author(s):  
M. Lenge ◽  
A. Ramalli ◽  
E. Boni ◽  
A. Cellai ◽  
H. Liebgott ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Frame Rate ◽  
Flow Imaging ◽  
High Frame Rate

High-frame-rate 2-D vector blood flow imaging in the frequency domain

2014 ◽  
Vol 61 (9) ◽  
pp. 1504-1514 ◽  
Author(s):  
Matteo Lenge ◽  
Alessandro Ramalli ◽  
Enrico Boni ◽  
Hervé Liebgott ◽  
Christian Cachard ◽  
...  
Keyword(s):  
Blood Flow ◽  
Frequency Domain ◽  
Frame Rate ◽  
Flow Imaging ◽  
Blood Flow Imaging ◽  
High Frame Rate

scholarly journals High-Frame-Rate 3-D Vector Flow Imaging in the Frequency Domain

2020 ◽  
Vol 10 (15) ◽  
pp. 5365 ◽  
Author(s):  
Stefano Rossi ◽  
Alessandro Ramalli ◽  
Fabian Fool ◽  
Piero Tortoli
Keyword(s):  
Frequency Domain ◽  
Signal To Noise Ratio ◽  
Ultrasonic Transducer ◽  
Computational Cost ◽  
Three Dimensional ◽  
Frame Rate ◽  
Velocity Measurements ◽  
High Frame Rate ◽  
Capacitive Micromachined Ultrasonic Transducer ◽  
Spiral Array

Ultrasound vector Doppler techniques for three-dimensional (3-D) blood velocity measurements are currently limited by low temporal resolution and high computational cost. In this paper, an efficient 3-D high-frame-rate vector Doppler method, which estimates the displacements in the frequency domain, is proposed. The novel method extends to 3-D an approach so far proposed for two-dimensional (2-D) velocity measurements by approximating the (x, y, z) displacement of a small volume through the displacements estimated for the 2-D regions parallel to the y and x directions, respectively. The new method was tested by simulation and experiments for a 3.7 MHz, 256-element, 2-D piezoelectric sparse spiral array. Simulations were also performed for an equivalent 7 MHz Capacitive Micromachined Ultrasonic Transducer spiral array. The results indicate performance (bias ± standard deviation: 6.5 ± 8.0) comparable to the performance obtained by using a linear array for 2-D velocity measurements. These results are particularly encouraging when considering that sparse arrays were used, which involve a lower signal-to-noise ratio and worse beam characteristics with respect to full 2-D arrays.

scholarly journals High frame-rate intravascular optical frequency-domain imaging in vivo

2013 ◽  
Vol 5 (1) ◽  
pp. 223 ◽  
Author(s):  
Han Saem Cho ◽  
Sun-Joo Jang ◽  
Kyunghun Kim ◽  
Alexey V. Dan-Chin-Yu ◽  
Milen Shishkov ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Frame Rate ◽  
Optical Frequency ◽  
Optical Frequency Domain Imaging ◽  
High Frame Rate

Measurement of regional pulse wave velocity using very high frame rate ultrasound

Choonpa Igaku ◽  
2015 ◽  
Vol 42 (6) ◽  
pp. 701-709
Author(s):  
Hideyuki HASEGAWA ◽  
Kazue HONGO ◽  
Hiroshi KANAI
Keyword(s):  
Pulse Wave Velocity ◽  
Wave Velocity ◽  
Pulse Wave ◽  
Frame Rate ◽  
High Frame Rate ◽  
Very High

scholarly journals High frame-rate multichannel beam-scanning microscopy based on Lissajous trajectories

2014 ◽  
Vol 22 (20) ◽  
pp. 24224 ◽  
Author(s):  
Shane Z. Sullivan ◽  
Ryan D. Muir ◽  
Justin A. Newman ◽  
Mark S. Carlsen ◽  
Suhas Sreehari ◽  
...  
Keyword(s):  
Frame Rate ◽  
Scanning Microscopy ◽  
Beam Scanning ◽  
High Frame Rate ◽  
Lissajous Trajectories

scholarly journals Limits of subjective and objective vection for ultra-high frame rate visual displays

Displays ◽  
2020 ◽  
Vol 64 ◽  
pp. 101961 ◽  
Author(s):  
Séamas Weech ◽  
Sophie Kenny ◽  
Claudia Martin Calderon ◽  
Michael Barnett-Cowan
Keyword(s):  
Frame Rate ◽  
Visual Displays ◽  
High Frame Rate
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