A comparison of CMUTs and piezoelectric transducer elements for 2D medical imaging based on conventional simulation models

Author

Wygant, I.

Author_Institution

Adv. Technol. Group, Texas Instrum., Santa Clara, CA, USA

fYear

2011

fDate

18-21 Oct. 2011

Firstpage

100

Lastpage

103

Abstract

This work compares CMUT and piezoelectric transducer technology for a typical 1D 7.5-MHz medical transducer array element. The comparison is based on the Redwood model of the piezoelectric transducer and a spring-mass-damper model for the CMUT. The simulated CMUT shows over twice the fractional bandwidth of the piezoelectric transducer but one-half the sensitivity and lower noise-equivalent-voltage. Experimental data from a CMUT array element generally confirms the CMUT simulations although shows lower source pressure and bandwidth.

Keywords

biomedical transducers; biomedical ultrasonics; capacitive sensors; micromachining; piezoelectric transducers; ultrasonic transducer arrays; 1D medical transducer array element; 2D medical imaging; CMUT array element; CMUT simulations; Redwood model; capacitive micromachined ultrasound transducer; fractional bandwidth; noise-equivalent-voltage; piezoelectric transducer elements; piezoelectric transducer technology; simulated CMUT; simulation models; source pressure; spring-mass-damper model; Bandwidth; Sonar equipment; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2011 IEEE International

Conference_Location

Orlando, FL

ISSN

1948-5719

Print_ISBN

978-1-4577-1253-1

Type

conf

DOI

10.1109/ULTSYM.2011.0025

Filename

6293606