Visualising peripheral arterioles and venules through high-resolution and large-area photoacoustic imaging

Yoshiaki Matsumoto, Yasufumi Asao, Hiroyuki Sekiguchi, Aya Yoshikawa, Tomoko Ishii, Ken ichi Nagae, Shuichi Kobayashi, Itaru Tsuge, Susumu Saito, Masahiro Takada, Yoshihiro Ishida, Masako Kataoka, Takaki Sakurai, Takayuki Yagi, Kenji Kabashima, Shigehiko Suzuki, Kaori Togashi, Tsuyoshi Shiina, Masakazu Toi

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Photoacoustic (PA) imaging (PAI) has been shown to be a promising tool for non-invasive blood vessel imaging. A PAI system comprising a hemispherical detector array (HDA) has been reported previously as a method providing high morphological reproducibility. However, further improvements in diagnostic capability will require improving the image quality of PAI and fusing functional and morphological imaging. Our newly developed PAI system prototype not only enhances the PA image resolution but also acquires ultrasonic (US) B-mode images at continuous positions in the same coordinate axes. In addition, the pulse-to-pulse alternating laser irradiation shortens the measurement time difference between two wavelengths. We scanned extremities and breasts in an imaging region 140 mm in diameter and obtained 3D-PA images of fine blood vessels, including arterioles and venules. We could estimate whether a vessel was an artery or a vein by using the S-factor obtained from the PA images at two wavelengths, which corresponds approximately to the haemoglobin oxygen saturation. Furthermore, we observed tumour-related blood vessels around breast tumours with unprecedented resolution. In the future, clinical studies with our new PAI system will help to elucidate various mechanisms of vascular-associated diseases and events.

Original languageEnglish
Article number14930
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 2018 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • General

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