Implementation of noninvasive flow velocimetry through Monte Carlo simulation

Jen Chien Chien*, Bor-Shyh Lin, Bor Shing Lin, Shu Mei Wu, Fok Ching Chong

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


One of the most important mechanisms for maintaining the life of human beings is the human circulatory system. This research focuses on a non-invasive technique that maintains high resolution and high precision of measuring photon in the blood stream. We hope to obtain important biomedical parameters valuable for pathological diagnosis. In phase I, a non-invasive optical flow velocimetry is implemented for detecting the human circulatory system under the skin surface. The source of the incidence photon is He-Ne laser. The signal is transmitted and detected via a Y-type optical fiber. Optical heterodyning is used to measure the frequency difference between the reflection wave and the original incidence laser wave. Then numerical simulation using Monte Carlo was used in the analysis to verify the result. In phase II, after a velocimetry specification was decided, it was modeled, tested and verified using Monte Carlo simulation. Then the apparatus were set up as directed in the model. The performance of this velocimetry is satisfactory and acceptable. This method of implementing a velocimetry is simple, convenience and fast. Thus, no prior clinical experiment is need. Moreover, the best reading for the reflected wave is 45° ±2.35°. This is a real-time and continuous detecting blood flow velocimetry. We find that this is a reliable tool for doctors when doing clinical diagnosis.

Original languageEnglish
Pages (from-to)3311-3313
Number of pages3
JournalAnnual Reports of the Research Reactor Institute, Kyoto University
StatePublished - Oct 2001
Event23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Istanbul, Turkey
Duration: 25 Oct 200128 Oct 2001


  • Circulatory system
  • Clinical detection
  • He-Ne laser
  • Optical heterodyning


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