Fundamental Study for Optical Transillumination Imaging of Arteriovenous Fistula - System Integration into Practical Compact Device for Bedside Application

Hideaki Kamiyama, Masataka Kitama, Masaji Yamashita, Hisae O. Shimizu, Yohichiro Kojima, Go Okuyama, Akihiro Kikuchi, Koichi Shimizu

研究成果: Conference contribution

抄録

In dialysis therapy, an arteriovenous (AV) fistula is often required to maintain enough blood flow. The major problem of the AV fistula is its stenosis and occlusion, and the daily management of the AV fistula is one of the most important issues in dialysis. However, the current management techniques in clinical practice are invasive or subjective. To solve this problem, we proposed an optical transillumination imaging technique to visualize the condition of the AV fistula. The measurement of the diameter of AV fistula with this technique makes the early detection of stenosis and occlusion possible. We developed an experimental system and measured the diameter of the AV fistula in transillumination images. Though we could confirm the feasibility of the proposed technique, the developed experimental system was too large and heavy for the bedside use in clinical practice. In this study, we tried to downsize the measurement system and to improve its human interface. The previous system consisted of a heavy CCD camera and light source with each controller. They were connected to a personal computer for control and data processing. All of them were housed in a metal frame to make the whole system large (0.14 m 3 ) and heavy (20 kg). We designed a new system using the new devices which were small in size and light in weight. The functions of device control and data processing were integrated into a one-board computer (Raspberry Pi). As a result, the weight of the entire system was reduced to about 1/25 and the volume to about 1/12 of its original values. The system has become usable at bedside and easily movable among the patient's rooms in a hospital. The captured and processed images can be monitored on the 7.0 inch display mounted on a one-board computer. Finally, we examined the feasibility of the new system to measure the diameter of a blood vessel using a model phantom. The diameters measured in the transillumination images were accurate enough for clinical applications. In this study, we confirmed the significant advancement of the proposed technique toward the practical application in clinical use.

本文言語English
ホスト出版物のタイトル2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018 - Proceedings
出版社Institute of Electrical and Electronics Engineers Inc.
ページ308-310
ページ数3
ISBN(電子版)9784885523151
DOI
出版ステータスPublished - 2018 12 31
イベント2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018 - Toyama, Japan
継続期間: 2018 8 12018 8 4

出版物シリーズ

名前Progress in Electromagnetics Research Symposium
2018-August
ISSN(印刷版)1559-9450
ISSN(電子版)1931-7360

Other

Other2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018
国/地域Japan
CityToyama
Period18/8/118/8/4

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 電子材料、光学材料、および磁性材料

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