A charge amplification approach for photoacoustic tomography (PAT) with parallel acoustic delay line (PADL) arrays

Cheng Fang; Arif Ustun; Young Cho; Jun Zou

doi:10.1117/12.2250433

3 March 2017 A charge amplification approach for photoacoustic tomography (PAT) with parallel acoustic delay line (PADL) arrays

Cheng Fang, Arif Ustun, Young Cho, Jun Zou

Author Affiliations +

Proceedings Volume 10064, Photons Plus Ultrasound: Imaging and Sensing 2017; 100645R (2017) https://doi.org/10.1117/12.2250433
Event: SPIE BiOS, 2017, San Francisco, California, United States

Abstract

This paper reports the development of a new charge amplification approach for photoacoustic tomography (PAT) based on parallel acoustic delay line (PADL) arrays. By using a PADL array to create different time delays, multiple-channel PA signals can be received simultaneously with a single-element transducer followed by single-channel DAQ electronics for image reconstruction. Unlike the conventional voltage amplifiers whose output voltage drops with increasing transducer capacitance, both theoretical analysis and experimental results have shown that the charge amplification can provide almost constant transducer-amplifier gain, which is not affected by the transducer capacitance. Therefore, it allows the use of a large single-element transducer to interface many PADLs without sacrificing the SNR of each channel. This opens the possibility of using large PADL arrays to achieve PAT with a wide field of view and high lateral resolution.

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Cheng Fang, Arif Ustun, Young Cho, and Jun Zou "A charge amplification approach for photoacoustic tomography (PAT) with parallel acoustic delay line (PADL) arrays", Proc. SPIE 10064, Photons Plus Ultrasound: Imaging and Sensing 2017, 100645R (3 March 2017); https://doi.org/10.1117/12.2250433

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KEYWORDS

Transducers

Acquisition tracking and pointing

Ultrasonography

Amplifiers

Ferroelectric materials

Optical amplifiers

Acoustics

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