DocumentCode
3468563
Title
Synthetic aperture focusing techniques applied in the near field of a focused transducer
Author
Masri, W. ; Mina, M. ; Udpa, Satish S. ; Udpa, L. ; Xue, T. ; Lord, W.
Author_Institution
Dept. of Electr. Eng. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Volume
1
fYear
1995
fDate
7-10 Nov 1995
Firstpage
783
Abstract
Synthetic aperture focusing techniques (SAFT) are used to improve the signal-to-noise ratio (SNR) of ultrasonic images. The effect of applying SAFT in the near-field of a focused transducer is studied. The variations in the near-field zone are derived analytically and used to modify the SAFT algorithm. SAFT is performed on both the RF data and the envelope of the signal. Experimental results demonstrating the effectiveness of the approach are presented
Keywords
acoustic noise; ultrasonic focusing; ultrasonic imaging; ultrasonic transducers; RF data; SAFT algorithm; envelope; focused transducer; near-field zone; signal-to-noise ratio; synthetic aperture focusing techniques; ultrasonic images; Acoustic transducers; Circuits; Envelope detectors; Focusing; Geometry; Integral equations; RF signals; Radio frequency; Solids; Ultrasonic transducers;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location
Seattle, WA
ISSN
1051-0117
Print_ISBN
0-7803-2940-6
Type
conf
DOI
10.1109/ULTSYM.1995.495683
Filename
495683
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