Photoacoustic mammography capable of simultaneously acquiring photoacoustic and ultrasound images

Yasufumi Asao, Yohei Hashizume, Takahiro Suita, Ken Ichi Nagae, Kazuhiko Fukutani, Yoshiaki Sudo, Toshikazu Matsushita, Shuichi Kobayashi, Mariko Tokiwa, Iku Yamaga, Elham Fakhrejahani, Masae Torii, Masahiro Kawashima, Masahiro Takada, Shotaro Kanao, Masako Kataoka, Tsuyoshi Shiina, Masakazu Toi

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


We have constructed a prototype photoacoustic mammography system (PAM-02) capable of simultaneously acquiring photoacoustic (PA) and ultrasound (US) images. Each PA, US, and fused PA/US image can be acquired over a wide area of the breast using the scanning module of a US transducer, a PA detector, and optical prisms. The resolution of the PA images exhibits improvement from 2 to 1 mm compared to images acquired using our previous prototype. The maximum scan area of PAM-02 is 90 mm along the horizontal axis and 150 mm along the vertical axis. In a phantom experiment, the available depth was at least 45 mm. A representative example of the application of the PAM-02 prototype in clinical research at Kyoto University is presented and shows S-factor images, which are considered an approximation parameter related to hemoglobin saturation of tumor-related blood vessels. We confirmed the applicability of the system for anatomical and biological research.

Original languageEnglish
Article number116009
JournalJournal of biomedical optics
Issue number11
Publication statusPublished - 2016 Nov 1
Externally publishedYes


  • mammography
  • optoacoustic
  • photoacoustic imaging
  • ultrasound

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering


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