Characterization of photoacoustic tomography system with dual illumination

Kazuhiko Fukutani, Yasuhiro Someda, Masakazu Taku, Yasufumi Asao, Shuichi Kobayashi, Takayuki Yagi, Makoto Yamakawa, Tsuyoshi Shiina, Tomoharu Sugie, Masakazu Toi

研究成果: Conference contribution

14 被引用数 (Scopus)

抄録

In this study, we characterized a newly developed imaging system, "dual illumination mode photoacoustic tomography (PAT) system". The PAT system can simultaneously or separately illuminate biological tissues from a forward and backward direction toward an array transducer. The shape of the custom-made transducer is rectangular, which allows direct illumination of tissue surfaces in front of the array transducer through a holding plate from the backward direction. The transducer frequency was designed at 1 MHz by considering the trade-off relationship between ultrasound attenuation and image resolution. A Ti:Sa laser optically pumped with a Q-switched Nd:YAG laser, having a tunable wavelength of 700 to 900 nm, was chosen for deep light penetration in tissues. The laser light was sufficiently expanded and homogenized to keep the level of laser-pulse fluence on the sample surface under the ANSI safety limit. System performance was tested with phantoms. The results of our study showed that the system visualized all the absorbers embedded in a 50-mm-thick tissue-mimicking phantom with a lateral resolution of 2∼3 mm.

本文言語English
ホスト出版物のタイトルPhotons Plus Ultrasound
ホスト出版物のサブタイトルImaging and Sensing 2011
DOI
出版ステータスPublished - 2011
外部発表はい
イベントPhotons Plus Ultrasound: Imaging and Sensing 2011 - San Francisco, CA, United States
継続期間: 2011 1月 232011 1月 25

出版物シリーズ

名前Progress in Biomedical Optics and Imaging - Proceedings of SPIE
7899
ISSN(印刷版)1605-7422

Conference

ConferencePhotons Plus Ultrasound: Imaging and Sensing 2011
国/地域United States
CitySan Francisco, CA
Period11/1/2311/1/25

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 原子分子物理学および光学
  • 放射線学、核医学およびイメージング

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