DocumentCode :
3094168
Title :
S-sequence bias-encoded photoacoustic imaging with top Orthogonal to Bottom Electrode (TOBE) CMUT arrays
Author :
Zemp, Roger J. ; Chee, Ryan ; Sampaleanu, Alexander ; Rishi, Deepak ; Forbrich, Alexander
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada
fYear :
2013
fDate :
21-25 July 2013
Firstpage :
1197
Lastpage :
1200
Abstract :
Recently we introduced Top Orthogonal to Bottom Electrode (TOBE) Capacitive Micromachined Ultrasound Transducers (CMUTs) as novel 2D arrays capable of 3D ultrasound imaging using only N transmit/receive and N bias channels for an NxN array. Here we adapt these devices for photoacoustic imaging by biasing one column and receiving across rows in parallel, then biasing another column and receiving along rows, and repeating this procedure until all columns have been biased in turn. Only elements in rows which are biased are dominantly sensitive to receive signals. Additionally, we propose a method to bias more than one column at a time using a biasing pattern sampled from rows or columns of a Hadamard S-matrix to improve signal-to-noise ratio, and demonstrate simulation results validating the proposed theory.
Keywords :
S-matrix theory; acoustic noise; acoustic signal processing; electrodes; photoacoustic effect; ultrasonic imaging; ultrasonic transducer arrays; 3D ultrasound imaging; CMUT arrays; Hadamard S-matrix; S-sequence bias-encoded photoacoustic imaging; capacitive micromachined ultrasound transducer arrays; novel 2D arrays; signal-to-noise ratio; top orthogonal-to-bottom electrode; Apertures; Electrodes; Encoding; Imaging; Signal to noise ratio; Transducers; Ultrasonic imaging; 2D arrays; 3D ultrasound imaging; CMUTs; MEMS;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium (IUS), 2013 IEEE International
Conference_Location :
Prague
ISSN :
1948-5719
Print_ISBN :
978-1-4673-5684-8
Type :
conf
DOI :
10.1109/ULTSYM.2013.0306
Filename :
6724922
Link To Document :
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