An improved phased array ultrasonic probe using 0.91Pb(Zn1/3Nb2/3)O-3-0.09PbTiO(3) single crystal

Citation
S. Saitoh et al., An improved phased array ultrasonic probe using 0.91Pb(Zn1/3Nb2/3)O-3-0.09PbTiO(3) single crystal, JPN J A P 1, 38(5B), 1999, pp. 3380-3384
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
38
Issue
5B
Year of publication
1999
Pages
3380 - 3384
Database
ISI
SICI code
Abstract
A 96-channel phased array probe for echocardiography using a single-plate, 0.91Pb(Zn1/3Nb2/3)O-3-0.09PbTiO(3) (PZNT 91/9) single-crystal transducer wi th dimensions of 14 x 20 mm has been fabricated to realize greater sensitiv ity and broader bandwidth properties. The center frequency of the probe, 3. 5 MHz, was selected to cover the bandwidths of two conventional lead zircon ate titanate (PZT) ceramic probes with center frequencies of 2.5 and 3.75 M Hz. A solder paste was used to connect a flexible printed circuit to the PZ NT 91/9 transducer. The echo amplitude of the PZNT 91/9 probe is about 6 JB higher than that of the two PZT probes, and the fractional bandwidths are 30 and 75 percentage points wider, respectively. The B-mode image quality o f the PZNT 91/9 probe is comparable to that of the two PZT probes, and the Doppler sensitivity of the PZNT 91/9 probe is almost equal to that of the 2 .5 MHz PZT probe, which means that the PZNT 91/9 probe matches both the pen etration of the 2.5 MHz PZT probe and the resolution of 3.75 MHz PZT probe.