scholarly journals High-Resolution Interferometric Synthetic Aperture Imaging in Scattering Media

2020 ◽  
Vol 13 (1) ◽  
pp. 291-316 ◽  
Author(s):  
Liliana Borcea ◽  
Josselin Garnier
Keyword(s):  
High Resolution ◽  
Synthetic Aperture ◽  
Scattering Media ◽  
Synthetic Aperture Imaging

scholarly journals Photonics-based broadband radar for high-resolution and real-time inverse synthetic aperture imaging

2017 ◽  
Vol 25 (14) ◽  
pp. 16274 ◽  
Author(s):  
Fangzheng Zhang ◽  
Qingshui Guo ◽  
Ziqian Wang ◽  
Pei Zhou ◽  
Guoqiang Zhang ◽  
...  
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging

scholarly journals High-Resolution 3-D Refractive Index Tomography and 2-D Synthetic Aperture Imaging of Live Phytoplankton

2014 ◽  
Vol 18 (6) ◽  
pp. 691-697 ◽  
Author(s):  
SangYun Lee ◽  
Kyoohyun Kim ◽  
Adam Mubarok ◽  
Adisetyo Panduwirawan ◽  
KyeoReh Lee ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Resolution ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging

Summary and Expectation of Synthetic Aperture Imaging towards High-Orbit Objects

2014 ◽  
Vol 599-601 ◽  
pp. 1745-1748
Author(s):  
Xi Yu Li ◽  
Xin Gao ◽  
Jia Tang ◽  
Chang Ming Lu
Keyword(s):  
High Resolution ◽  
Atmospheric Turbulence ◽  
Synthetic Aperture ◽  
Imaging Method ◽  
Large Telescope ◽  
Intensity Correlation ◽  
Synthetic Aperture Imaging ◽  
Satellite Imaging ◽  
Orbit Satellite ◽  
High Orbit

The resolution of ground-based large aperture adaptive telescope which is limited by diffraction and atmospheric turbulence can’t achieve the demand of high-orbit satellite imaging, while synthetic aperture imaging can get high resolution without using large telescope. In this paper, we analyzed the merits and demerits of several synthetic aperture imaging method such as amplitude interference imaging, intensity correlation imaging, and Fourier telescope which can be used in high-orbit satellite imaging. According to the analysis we prospected for the development of synthetic aperture imaging method towards high-orbit satellite in the future

Golay Coded Sequences in Synthetic Aperture Imaging Systems

2011 ◽  
Vol 36 (4) ◽  
Author(s):  
Ihor Trots ◽  
Yuriy Tasinkevych ◽  
Andrzej Nowicki ◽  
Marcin Lewandowski
Keyword(s):  
Imaging Systems ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging

scholarly journals Synthetic Aperture Imaging Using High-Frequency Convex Array for Ophthalmic Ultrasound Applications

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2275
Author(s):  
Hae Gyun Lim ◽  
Hyung Ham Kim ◽  
Changhan Yoon
Keyword(s):  
Image Quality ◽  
Penetration Depth ◽  
Spatial Resolution ◽  
High Frequency ◽  
Imaging System ◽  
Ex Vivo ◽  
Synthetic Aperture ◽  
Single Element ◽  
High Frequency Ultrasound ◽  
Synthetic Aperture Imaging

High-frequency ultrasound (HFUS) imaging has emerged as an essential tool for pre-clinical studies and clinical applications such as ophthalmic and dermatologic imaging. HFUS imaging systems based on array transducers capable of dynamic receive focusing have considerably improved the image quality in terms of spatial resolution and signal-to-noise ratio (SNR) compared to those by the single-element transducer-based one. However, the array system still suffers from low spatial resolution and SNR in out-of-focus regions, resulting in a blurred image and a limited penetration depth. In this paper, we present synthetic aperture imaging with a virtual source (SA-VS) for an ophthalmic application using a high-frequency convex array transducer. The performances of the SA-VS were evaluated with phantom and ex vivo experiments in comparison with the conventional dynamic receive focusing method. Pre-beamformed radio-frequency (RF) data from phantoms and excised bovine eye were acquired using a custom-built 64-channel imaging system. In the phantom experiments, the SA-VS method showed improved lateral resolution (>10%) and sidelobe level (>4.4 dB) compared to those by the conventional method. The SNR was also improved, resulting in an increased penetration depth: 16 mm and 23 mm for the conventional and SA-VS methods, respectively. Ex vivo images with the SA-VS showed improved image quality at the entire depth and visualized structures that were obscured by noise in conventional imaging.

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