Paper Info
Title
Fabrication of a PMN-PT single crystal-based transcranial Doppler transducer and the power regulation of its detection system.
Abstract
Doppler sonographic measurement of flow velocity in the basal cerebral arteries through the intact skull was developed using a pulsed Doppler technique and 2 MHz emitting frequency. Relaxor-based ferroelectric single crystals Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) were chosen to be the piezoelectric transducer material due to their ultrahigh piezoelectric coefficients, high electromechanical coupling coefficients and low dielectric loss. The pulse-echo response of the transducer was measured using the conventional pulse-echo method in a water bath at room temperature. The -6 dB bandwidth of the transducer is 68.4% and the sensitivity is -17.4 dB. In order to get a good match between transducer and detection system, different transmission powers have been regulated by changing the impedance of the transmitting electric circuit. In the middle cerebral artery (MCA) measurement photograph results, as the transmission power is increasing, the detection results become clearer and clearer. A comparison at the same transmission power for different transducers shows that the detection photograph obtained by the crystal transducer was clearer than that obtained with a commercial transducer, which should make it easier for doctors to find the cerebral arteries.
Year
DOI
Venue
2014
10.3390/s141224462
SENSORS
Keywords
Field
DocType
ultrasonic transducer,PMN-PT single crystal,transcranial doppler transducer,power regulation
Transducer,Ferroelectricity,Ultrasonic sensor,Dielectric loss,Electronic engineering,Electrical impedance,Acoustics,Engineering,Electronic circuit,Doppler effect,Piezoelectricity
Journal
Volume
Issue
ISSN
14
12.0
1424-8220
Citations 
PageRank 
References 
0
0.34
0
Authors
7
Name
Order
Citations
PageRank
Qingwen Yue121.83
Dongxu Liu200.68
Wei Wang3589.02
Wenning Di400.68
Di Lin500.68
Xi'an Wang600.34
Haosu Luo701.01