Improving biomedical ultrasonic imaging systems through coded excitation and pulse compression.

2008 ◽  
Vol 124 (4) ◽  
pp. 2473-2473
Author(s):  
Michael Oelze ◽  
Jose Sanchez
Keyword(s):  
Pulse Compression ◽  
Ultrasonic Imaging ◽  
Imaging Systems ◽  
Coded Excitation

scholarly journals Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

2021 ◽  
Vol 11 (4) ◽  
pp. 1508
Author(s):  
Muhammad Khalid Rizwan ◽  
Stefano Laureti ◽  
Hubert Mooshofer ◽  
Matthias Goldammer ◽  
Marco Ricci
Keyword(s):  
Carbon Fiber ◽  
Pulse Compression ◽  
Phased Array ◽  
Signal To Noise Ratio ◽  
Near Field ◽  
Ultrasonic Imaging ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Custom Made ◽  
Carbon Fiber Reinforced

The use of pulse-compression in ultrasonic non-destructive testing has assured, in various applications, a significant improvement in the signal-to-noise ratio. In this work, the technique is combined with linear phased array to improve the sensitivity and resolution in the ultrasonic imaging of highly attenuating and scattering materials. A series of tests were conducted on a 60 mm thick carbon fiber reinforced polymer benchmark sample with known defects using a custom-made pulse-compression-based phased array system. Sector scan and total focusing method images of the sample were obtained with the developed system and were compared with those reconstructed by using a commercial pulse-echo phased array system. While an almost identical sensitivity was found in the near field, the pulse-compression-based system surpassed the standard one in the far-field producing a more accurate imaging of the deepest defects and of the backwall of the sample.

A new beamforming technique for ultrasonic imaging systems

Ultrasonics ◽  
2000 ◽  
Vol 38 (1-8) ◽  
pp. 156-160
Author(s):  
G. Cincotti ◽  
G. Cardone ◽  
P. Gori ◽  
M. Pappalardo
Keyword(s):  
Ultrasonic Imaging ◽  
Imaging Systems ◽  
Beamforming Technique

Development in High Frequency Ultrasonic Imaging and Transducers

2002 ◽  
Author(s):  
K. Kirk Shung
Keyword(s):  
High Frequency ◽  
Ultrasonic Imaging ◽  
Piezoelectric Element ◽  
Large Degree ◽  
Imaging Systems ◽  
High Frequency Ultrasound ◽  
High Frequencies ◽  
Recent Developments ◽  
Supporting Structures ◽  
Frequency Ultrasound

There has been intense interest recently in ultrasonic imaging in the frequency range from 20 MHz and beyond in biomedicine. High frequency ultrasound has applications in dermatology, ophthalmology and intravascular imaging because of its superior resolution. The performance of ultrasonic imaging systems especially at high frequencies depends critically upon the transducers/arrays, the design of which in turn is determined to a large degree by the materials and fabrication methodology of the piezoelectric element and supporting structures. Recent developments in these areas are discussed in this paper.

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