Development of photoacoustic imaging system of finger vasculature using ring-shaped ultrasound transducer

Misaki Nishiyama, Takeshi Namita, Kengo Kondo, Makoto Yamakawa, Tsuyoshi Shiina

Research output: Chapter in Book/Report/Conference proceedingConference contribution


For early diagnosis of rheumatoid arthritis (RA), it is important to visualize its potential marker, vascularization in the synovial membrane of the finger joints. Photoacoustic (PA) imaging, which can image blood vessels at high contrast and resolution is expected to be a potential modality for earlier diagnosis of RA. In previous studies of PA finger imaging, different acoustic schemes such as linear or arc-shaped arrays have been utilized, but these have limited detection views, rendering inaccurate reconstruction, and most of them require rotational detection. We are developing a photoacoustic system for finger vascular imaging using a ring-shaped array ultrasound transducer. By designing the ring-array based on simulations and phantom experiments, we have created a system that can image multiple objects of different diameters and has the potential to image small objects 0.1-0.5mm in diameter at accurate positions by providing PA and ultrasound echo images simultaneously. In addition, we determined that full width at half maximum (FWHM) of the slice direction corresponded to that of the simulation. In the future, this system may visualize the 3-D vascularization of RA patients' fingers.

Original languageEnglish
Title of host publicationPhotons Plus Ultrasound
Subtitle of host publicationImaging and Sensing 2018
EditorsLihong V. Wang, Alexander A. Oraevsky
ISBN (Electronic)9781510614734
Publication statusPublished - 2018
Externally publishedYes
EventPhotons Plus Ultrasound: Imaging and Sensing 2018 - San Francisco, United States
Duration: 2018 Jan 282018 Feb 1

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferencePhotons Plus Ultrasound: Imaging and Sensing 2018
Country/TerritoryUnited States
CitySan Francisco


  • finger vascular imaging
  • photoacoustic imaging
  • rheumatoid arthritis
  • ring-shaped ultrasound transducer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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