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LASER DOPPLER BLOOD FLOW MEASURING METHOD AND DEVICE

Foreign code F130007525
Posted date Jul 16, 2013
Country WIPO
International application number 2008JP073245
International publication number WO 2009/081883
Date of international filing Dec 19, 2008
Date of international publication Jul 2, 2009
Priority data
  • P2007-330112 (Dec 21, 2007) JP
Title LASER DOPPLER BLOOD FLOW MEASURING METHOD AND DEVICE
Abstract

Seat light beams (Ls) are formed by a cylindrical lens (22) from divided laser light from a semiconductor laser (12) and cross each other at a predetermined position. A lens system (30) for linearly focusing scattered light at a linear irradiation site (Lx) at which the seat light beams (Ls) cross each other is provided. An optical fiber array (32) of optical fibers (34) is disposed at a focusing position of the lens system (30). An avalanche photodiode (42) for converting the scattered light which is Doppler frequency-shifted by a blood flow into an electrical signal for each of the optical fibers (34) is provided. There are provided a laser Doppler blood flow measuring method and device capable of efficient multidimensional measurement in a wide range with high measurement accuracy for carrying out scanning while computing the blood flow rate in biological tissue at the linear irradiation site (Lx) for each of the optical fibers (34) from the Doppler frequency-shifted scattered light of the laser light and calculating the blood flow rate in a blood vessel in a predetermined region within a biological body.

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • INSTITUTE OF NATIONAL COLLEGES OF TECHNOLOGY, JAPAN,
  • NATIONAL UNIVERSITY CORPORATION UNIVERSITY OF TOYAMA,
  • HACHIGA, TADASHI,
  • ISHIDA, HIROKI,
  • AKIGUCHI, SHUNSUKE,
  • SHIRAKAWA, HIROKI,
  • ANDOH, TSUGUNOBU,
  • KURAISHI, YASUSHI
  • Inventor
  • HACHIGA, TADASHI,
  • ISHIDA, HIROKI,
  • AKIGUCHI, SHUNSUKE,
  • SHIRAKAWA, HIROKI,
  • ANDOH, TSUGUNOBU,
  • KURAISHI, YASUSHI
IPC(International Patent Classification)

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