DocumentCode :
1488028
Title :
A 3.7 MHz phased array probe using 0.91Pb(Zn/sub 1/3/Nb/sub 2/3/)O/sub 3/-0.09PbTiO/sub 3/
Author :
Saitoh, Shiroh ; Takeuchi, Takashi ; Kobayashi, Tsuyoshi ; Harada, Kouichi ; Shimanuki, Senji ; Yamashita, Yohachi
Author_Institution :
Res. & Dev. Center, Toshiba Corp., Kawasaki, Japan
Volume :
46
Issue :
2
fYear :
1999
fDate :
3/1/1999 12:00:00 AM
Firstpage :
414
Lastpage :
421
Abstract :
A novel 128-channel phased array probe for echocardiography with a center frequency of 3.7 MHz using 0.91Pb(Zn/sub 1/3/Nb/sub 2/3/)O/sub 3/-0.09PbTiO/sub 3/ (PZN-9%PT) single crystal has been fabricated to realize greater sensitivity and broader bandwidth properties. The echo amplitude of the PZN-9%PT single-crystal probe is about 5 dB higher than that of the conventional lead airconate titanate (PZT) ceramic probe, and the fractional bandwidth is about 25 percentage points broader. The quality of B mode images obtained by the PZN-9%PT probe satisfies the performance of the two types of conventional PZT ceramic probes that have center frequencies of 2.5 and 3.75 MHz. At the reference frequency of 3 MHz, the Doppler sensitivity of the PZN-9%PT probe is about 5 dB higher than that of the 3.75 MHz PZT probe; the blood flow of a pulmonary vein in a hard-to-image patient is much more clearly imaged than in the case of using the PZT probe. These superior images are attributable to the use of sufficiently large PZN-9%PT single crystals obtained by the self-flux method.
Keywords :
Doppler measurement; biomedical transducers; blood flow measurement; echocardiography; lead compounds; piezoelectric transducers; ultrasonic transducer arrays; 3.7 MHz; B-mode imaging; Doppler sensitivity; PZN-PT single crystal; PbZnNbO/sub 3/-PbTiO/sub 3/; blood flow; echocardiography; medical diagnosis; phased array probe; pulmonary vein; self-flux growth; ultrasonic transducer; Bandwidth; Blood flow; Ceramics; Echocardiography; Frequency; Niobium; Phased arrays; Probes; Titanium compounds; Veins;
fLanguage :
English
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-3010
Type :
jour
DOI :
10.1109/58.753031
Filename :
753031
Link To Document :
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