Real time inverse filter focusing through iterative time reversal

2004 ◽  
Vol 115 (2) ◽  
pp. 768-775 ◽  
Author(s):  
Gabriel Montaldo ◽  
Mickaël Tanter ◽  
Mathias Fink
Keyword(s):  
Real Time ◽  
Time Reversal ◽  
Inverse Filter

Real time inverse filter focusing by iterative time reversal

2002 ◽  
Vol 112 (5) ◽  
pp. 2446-2446 ◽  
Author(s):  
Gabriel Montaldo ◽  
Mickael Tanter ◽  
Mathias Fink
Keyword(s):  
Real Time ◽  
Time Reversal ◽  
Inverse Filter

Comparison between time reversal and spatio‐temporal inverse filter application to focusing through a human skull

2001 ◽  
Vol 109 (5) ◽  
pp. 2397-2397
Author(s):  
Mickael Tanter ◽  
Jean‐Francois Aubry ◽  
Jean‐Louis Thomas ◽  
Mathias Fink
Keyword(s):  
Time Reversal ◽  
Inverse Filter ◽  
Human Skull ◽  
Spatio Temporal

Real‐time characterization of unstationary flows using a time‐reversal mirror

1998 ◽  
Vol 103 (5) ◽  
pp. 2910-2910
Author(s):  
Agnes Maurel ◽  
Julien De Rosny ◽  
Sebastien Manneville ◽  
Philippe Roux ◽  
Mathias Fink
Keyword(s):  
Real Time ◽  
Time Reversal ◽  
Time Reversal Mirror

Real time identification of several targets by iterative time reversal

2002 ◽  
Vol 112 (5) ◽  
pp. 2308-2308 ◽  
Author(s):  
Gabriel Montaldo ◽  
Mickael Tanter ◽  
Mathias Fink
Keyword(s):  
Real Time ◽  
Time Reversal ◽  
Real Time Identification

A real-time formant tracker based on the inverse filter control method

2007 ◽  
Vol 28 (4) ◽  
pp. 271-274 ◽  
Author(s):  
Yuichi Ueda ◽  
Tomoya Hamakawa ◽  
Tadashi Sakata ◽  
Syota Hario ◽  
Akira Watanabe
Keyword(s):  
Real Time ◽  
Control Method ◽  
Inverse Filter

scholarly journals High-throughput volumetric adaptive optical imaging using compressed time-reversal matrix

2022 ◽  
Vol 11 (1) ◽  
Author(s):  
Hojun Lee ◽  
Seokchan Yoon ◽  
Pascal Loohuis ◽  
Jin Hee Hong ◽  
Sungsam Kang ◽  
...  
Keyword(s):  
Optical Imaging ◽  
Real Time ◽  
Mouse Brain ◽  
High Throughput ◽  
Time Reversal ◽  
Resolving Power ◽  
Fluorescence Labeling ◽  
Aberration Correction ◽  
Recording Time ◽  
Reflection Matrix

AbstractDeep-tissue optical imaging suffers from the reduction of resolving power due to tissue-induced optical aberrations and multiple scattering noise. Reflection matrix approaches recording the maps of backscattered waves for all the possible orthogonal input channels have provided formidable solutions for removing severe aberrations and recovering the ideal diffraction-limited spatial resolution without relying on fluorescence labeling and guide stars. However, measuring the full input–output response of the tissue specimen is time-consuming, making the real-time image acquisition difficult. Here, we present the use of a time-reversal matrix, instead of the reflection matrix, for fast high-resolution volumetric imaging of a mouse brain. The time-reversal matrix reduces two-way problem to one-way problem, which effectively relieves the requirement for the coverage of input channels. Using a newly developed aberration correction algorithm designed for the time-reversal matrix, we demonstrated the correction of complex aberrations using as small as 2% of the complete basis while maintaining the image reconstruction fidelity comparable to the fully sampled reflection matrix. Due to nearly 100-fold reduction in the matrix recording time, we could achieve real-time aberration-correction imaging for a field of view of 40 × 40 µm2 (176 × 176 pixels) at a frame rate of 80 Hz. Furthermore, we demonstrated high-throughput volumetric adaptive optical imaging of a mouse brain by recording a volume of 128 × 128 × 125 µm3 (568 × 568 × 125 voxels) in 3.58 s, correcting tissue aberrations at each and every 1 µm depth section, and visualizing myelinated axons with a lateral resolution of 0.45 µm and an axial resolution of 2 µm.

Improved time reversal focusing in complex media with inverse filter.

2008 ◽  
Vol 124 (4) ◽  
pp. 2551-2551
Author(s):  
Thomas Callaghan ◽  
George Papanicolaou
Keyword(s):  
Time Reversal ◽  
Complex Media ◽  
Inverse Filter

The stokes relations linking time reversal and the inverse filter

2005 ◽  
Author(s):  
F. Vignon ◽  
A. Saez ◽  
J.F. Aubry ◽  
M. Tanter ◽  
M. Fink
Keyword(s):  
Time Reversal ◽  
Inverse Filter

Real time bolt preload monitoring using piezoceramic transducers and time reversal technique—a numerical study with experimental verification

2016 ◽  
Vol 25 (8) ◽  
pp. 085015 ◽  
Author(s):  
Seyed Mohammad Parvasi ◽  
Siu Chun Michael Ho ◽  
Qingzhao Kong ◽  
Reza Mousavi ◽  
Gangbing Song
Keyword(s):  
Real Time ◽  
Experimental Verification ◽  
Time Reversal ◽  
Numerical Study ◽  
Bolt Preload
Sign in / Sign up

Export Citation Format

Share Document