Volume 23, Issue 2
Lithography of Aluminum Coated PVDF Annular Array for Photoacoustic Endoscopy

Jiaying Xiao, Tianshuang Wang, Kuan Peng, Xiaokai Zhang & Bo Wang

Commun. Comput. Phys., 23 (2018), pp. 561-571.

Published online: 2018-02

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  • Abstract

Focused transducers are frequently used in photoacoustic endoscopy (PAE) to ensure high acoustic resolution beyond the depth of optical diffraction. Although most transducers in PAE are ceramic and focus-fixed, we here propose the polyvinylidine fluoride (PVDF) based annular array to reduce the fabrication cost, and to allow dynamic focusing for increased depth of field. In this work, a method of direct lithography on the aluminum coated PVDF films was used for the annular array fabrication. The PVDF annular array was built with a 110 µm thick aluminum coated PVDF film, which contained three independent rings of equal width within a 5.5 mm aperture size. Phantom experiments were conducted for field test, and a simple linear model was used to compare the acquired results in the acoustic field test. The device was used for demonstration in PAE application. Potential applications of the proposed method include the PAE imaging of several large human organs and lumens such as the gastrointestinal tract and the cervical canal.

  • Keywords

Polyvinylidine fluoride, annular array, photoacoustic endoscopy, mask-and-etch method.

  • AMS Subject Headings

65C20, 65D30, 68U20

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{CiCP-23-561, author = {}, title = {Lithography of Aluminum Coated PVDF Annular Array for Photoacoustic Endoscopy}, journal = {Communications in Computational Physics}, year = {2018}, volume = {23}, number = {2}, pages = {561--571}, abstract = {

Focused transducers are frequently used in photoacoustic endoscopy (PAE) to ensure high acoustic resolution beyond the depth of optical diffraction. Although most transducers in PAE are ceramic and focus-fixed, we here propose the polyvinylidine fluoride (PVDF) based annular array to reduce the fabrication cost, and to allow dynamic focusing for increased depth of field. In this work, a method of direct lithography on the aluminum coated PVDF films was used for the annular array fabrication. The PVDF annular array was built with a 110 µm thick aluminum coated PVDF film, which contained three independent rings of equal width within a 5.5 mm aperture size. Phantom experiments were conducted for field test, and a simple linear model was used to compare the acquired results in the acoustic field test. The device was used for demonstration in PAE application. Potential applications of the proposed method include the PAE imaging of several large human organs and lumens such as the gastrointestinal tract and the cervical canal.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.OA-2017-0066}, url = {http://global-sci.org/intro/article_detail/cicp/10538.html} }
TY - JOUR T1 - Lithography of Aluminum Coated PVDF Annular Array for Photoacoustic Endoscopy JO - Communications in Computational Physics VL - 2 SP - 561 EP - 571 PY - 2018 DA - 2018/02 SN - 23 DO - http://dor.org/10.4208/cicp.OA-2017-0066 UR - https://global-sci.org/intro/article_detail/cicp/10538.html KW - Polyvinylidine fluoride, annular array, photoacoustic endoscopy, mask-and-etch method. AB -

Focused transducers are frequently used in photoacoustic endoscopy (PAE) to ensure high acoustic resolution beyond the depth of optical diffraction. Although most transducers in PAE are ceramic and focus-fixed, we here propose the polyvinylidine fluoride (PVDF) based annular array to reduce the fabrication cost, and to allow dynamic focusing for increased depth of field. In this work, a method of direct lithography on the aluminum coated PVDF films was used for the annular array fabrication. The PVDF annular array was built with a 110 µm thick aluminum coated PVDF film, which contained three independent rings of equal width within a 5.5 mm aperture size. Phantom experiments were conducted for field test, and a simple linear model was used to compare the acquired results in the acoustic field test. The device was used for demonstration in PAE application. Potential applications of the proposed method include the PAE imaging of several large human organs and lumens such as the gastrointestinal tract and the cervical canal.

Jiaying Xiao, Tianshuang Wang, Kuan Peng, Xiaokai Zhang & Bo Wang. (2020). Lithography of Aluminum Coated PVDF Annular Array for Photoacoustic Endoscopy. Communications in Computational Physics. 23 (2). 561-571. doi:10.4208/cicp.OA-2017-0066
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