A custom-made linear array transducer for photoacoustic breast imaging

被引:1
作者
Xia, Wenfeng [1 ]
Piras, Daniele [1 ]
Heijblom, Michelle [1 ]
van Hespen, Johan [1 ]
van Veldhoven, Spiridon
Prins, Christian
van Leeuwen, Ton G. [1 ]
Steenbergen, Wiendelt [1 ]
Manohar, Srirang [1 ]
机构
[1] Univ Twente, Mira Inst Biomed Technol & Tech Med, Biomed Photon Imaging Grp, POB 217, NL-7500 AE Enschede, Netherlands
来源
PHOTONS PLUS ULTRASOUND: IMAGING AND SENSING 2012 | 2012年 / 8223卷
基金
英国工程与自然科学研究理事会;
关键词
Photoacoustic imaging; breast cancer; linear array transducer; MAMMOSCOPE;
D O I
10.1117/12.908497
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A custom-made first prototype of a linear array ultrasound transducer for breast imaging is presented. Large active area transducer elements (5 mm x 5 mm) with 1 MHz resonance frequency are chosen to obtain a relatively high sensitivity. Acoustic lenses are used to enlarge the narrow acceptance angle of such transducer elements. The minimum detectable pressure, frequency bandwidth and electrical impedance of the transducer elements are characterized. The results show the transducer has a minimum detectable pressure of 0.8 Pa, which is superior than the transducers used in the Twente Photoacoustic Mammoscope system previously developed in our group. The bandwidth of the transducer is relative small, however it can be improved when using optimized matching layer thickness in future. We also observed a strong lateral resonance at 330 kHz, which may cause problems in various aspects for a photoacoustic imaging system. We discuss the future improvement and plans for the transducer optimizations.
引用
收藏
页数:6
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