Wearable transparent PVDF transducer for photoacoustic imager in body sensor network
- Resource Type
- Conference
- Authors
- Liu, Ya-Han; Lin, Fu-Sung; Chen, Li-Xiang; Su, Hsin-Yi; Hsu, You-Chi; Pal, Soma; Wang, Yeong-Her; Huang, Chih-Hsien
- Source
- 2020 IEEE International Ultrasonics Symposium (IUS) Ultrasonics Symposium (IUS),2020 IEEE International. :1-3 Sep, 2020
- Subject
- Bioengineering
Fields, Waves and Electromagnetics
Signal Processing and Analysis
Body sensor networks
Transducers
Three-dimensional displays
Indium tin oxide
Imaging
Acoustic sensors
Wearable sensors
PAI
transducer
PVDF
wearable sensor
- Language
- ISSN
- 1948-5727
A wearable transparent ultrasonic transducer was demonstrated with superior photoacoustic (PA) imaging performance regarding 116.8% −3dB fractional bandwidth, 4.75MHz center frequency, and $20\times 20\times 36\text{mm}^{3}$ volumetric imaging field. The wearable sensor was fabricated by sputtering 150nm thick amorphous Indium tin oxide (ITO) on the both sides of a 110um commercial Polyvinylidene fluoride (PVDF) film. A 532nm Nd:YAG laser with 5ns pulse width was used to generate co-register photoacoustic signals by delivering light into subjects through ITO and PVDF. A pencil lead with 0.3mm in diameter was used to evaluate the lateral resolution (400um). A 3D alphabet phantom made by a 3D printer were successfully imaged by self-designed PAI system. In Summary, the potential of using this acoustic sensor as a PA imager of wearable body sensor network applications was positive based on the results.