High-Resolution All-Digital Transmit Beamformer for High-Frequency and Wearable Ultrasound Imaging Systems

2020 ◽  
Vol 28 (2) ◽  
pp. 492-502 ◽  
Author(s):  
Duo Sheng ◽  
Jun-Wei Lin ◽  
Yi-Hsiang Wang ◽  
Chih-Chung Huang
Keyword(s):  
High Resolution ◽  
Ultrasound Imaging ◽  
High Frequency ◽  
Imaging Systems

32-Channel transmit beamformer with high timing resolution for high-frequency ultrasound imaging systems

2020 ◽  
Vol 91 (5) ◽  
pp. 054701
Author(s):  
Duo Sheng ◽  
Sheng-Min Chan ◽  
Chun-Wei Lin ◽  
Chih-Chung Huang
Keyword(s):  
Ultrasound Imaging ◽  
High Frequency ◽  
Imaging Systems ◽  
High Frequency Ultrasound ◽  
Timing Resolution ◽  
High Frequency Ultrasound Imaging ◽  
Frequency Ultrasound

Efficient and stable beamforming architecture for high frequency ultrasound imaging systems

2012 ◽  
Author(s):  
Han Jin Cho ◽  
Jeeun Kang ◽  
Jae Jin Lee ◽  
Jaehwang Choi ◽  
Tai-kyong Song ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
High Frequency ◽  
Imaging Systems ◽  
High Frequency Ultrasound ◽  
High Frequency Ultrasound Imaging ◽  
Frequency Ultrasound

High resolution ply-by-ply ultrasound imaging of impact damage in thick CFRP laminates by high-frequency acoustic microscopy

2021 ◽  
Vol 256 ◽  
pp. 113102
Author(s):  
Egor Morokov ◽  
Vadim Levin ◽  
Andrey Chernov ◽  
Alexander Shanygin
Keyword(s):  
High Resolution ◽  
Ultrasound Imaging ◽  
High Frequency ◽  
Impact Damage ◽  
Acoustic Microscopy ◽  
Cfrp Laminates

Development of a Bipolar Pulse Generator for High-Frequency Ultrasound Imaging System

2013 ◽  
Vol 311 ◽  
pp. 217-221 ◽  
Author(s):  
Jian Xing Wu ◽  
Pei Jarn Chen ◽  
Yi Chun Du ◽  
Chien Lin Wang ◽  
Guan Chun Chen ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
High Frequency ◽  
Pulse Generator ◽  
Ultrasound Image ◽  
Imaging Systems ◽  
Bipolar Pulse ◽  
High Frequency Ultrasound ◽  
Image System ◽  
High Frequency Ultrasound Imaging ◽  
Frequency Ultrasound

The pulse generator is the critical component in high-frequency ultrasound imaging systems. Currently, there still exist some shortcomings about commercial ultrasound image systems and devices such as 5900 PR …etc.. However, to achieve a higher sensitivity and high performance, a programmable pulser generator is desired to match the requirements of high frequency ultrasound image system. In this study, we utilized a novel bipolar pulse generator method to overcome those issues in developed high resolution image system. As the needs of application in clinic, a real –time of high-frequency ultrasound imaging systems, including pulse generator, high speed scanning mechanism, high voltage protection and FPGA trigger control circuit, was developed in our Laboratory. This paper will focus to compare the performance of the bipolar generator and unipolar generator as used in pulse generator device respectively. Finally, the developed bipolar pulse generator show the better performance than the unipolar generator does. The bipolar system can generate clean N-cycle bipolar pulses and improve the center frequency of transducer up to 60 MHz. The axial resolution of scan system has been improved to around 60 μm. In addition, the result indicated that the proposed bipolar pulser could increase 4 dB for pulse/echo waveforms amplitude.

scholarly journals High resolution ultrasound imaging for repeated measure of wound tissue morphometry, biomechanics and hemodynamics under fetal, adult and diabetic conditions

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241831
Author(s):  
Surya C. Gnyawali ◽  
Mithun Sinha ◽  
Mohamed S. El Masry ◽  
Brian Wulff ◽  
Subhadip Ghatak ◽  
...  
Keyword(s):  
Wound Healing ◽  
High Resolution ◽  
Ultrasound Imaging ◽  
High Frequency ◽  
Normal Skin ◽  
Repeated Measure ◽  
Non Invasive ◽  
Severe Strain ◽  
Inflammatory Phase ◽  
Wound Tissue

Non-invasive, repeated interrogation of the same wound is necessary to understand the tissue repair continuum. In this work, we sought to test the significance of non-invasive high-frequency high-resolution ultrasound technology for such interrogation. High-frequency high-resolution ultrasound imaging was employed to investigate wound healing under fetal and adult conditions. Quantitative tissue cellularity and elastic strain was obtained for visualization of unresolved inflammation using Vevo strain software. Hemodynamic properties of the blood flow in the artery supplying the wound-site were studied using color Doppler flow imaging. Non-invasive monitoring of fetal and adult wound healing provided unprecedented biomechanical and functional insight. Fetal wounds showed highly accelerated closure with transient perturbation of wound tissue cellularity. Fetal hemodynamics was unique in that sharp fall in arterial pulse pressure (APP) which was rapidly restored within 48h post-wounding. In adults, APP transiently increased post-wounding before returning to the pre-wounding levels by d10 post-wounding. The pattern of change in the elasticity of wound-edge tissue of diabetics was strikingly different. Severe strain acquired during the early inflammatory phase persisted with a slower recovery of elasticity compared to that of the non-diabetic group. Wound bed of adult diabetic mice (db/db) showed persistent hypercellularity compared to littermate controls (db/+) indicative of prolonged inflammation. Normal skin strain of db/+ and db/db were asynchronous. In db/db, severe strain acquired during the early inflammatory phase persisted with a slower recovery of elasticity compared to that of non-diabetics. This study showcases a versatile clinically relevant imaging platform suitable for real-time analyses of functional wound healing.

CMOS Ultrasonic Receiver With On-Chip Analog-to-Digital Front End for High-Resolution Ultrasound Imaging Systems

2016 ◽  
Vol 16 (20) ◽  
pp. 7454-7463 ◽  
Author(s):  
Teng-Chuan Cheng ◽  
Tsung-Heng Tsai
Keyword(s):  
High Resolution ◽  
Ultrasound Imaging ◽  
Imaging Systems ◽  
Analog To Digital ◽  
Front End ◽  
On Chip

scholarly journals Bipolar-power-transistor-based limiter for high frequency ultrasound imaging systems

Ultrasonics ◽  
2014 ◽  
Vol 54 (3) ◽  
pp. 754-758 ◽  
Author(s):  
Hojong Choi ◽  
Hao-Chung Yang ◽  
K. Kirk Shung
Keyword(s):  
Ultrasound Imaging ◽  
High Frequency ◽  
Imaging Systems ◽  
High Frequency Ultrasound ◽  
Power Transistor ◽  
High Frequency Ultrasound Imaging ◽  
Frequency Ultrasound
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