Implementation of Doppler Velocimetry Using Monte Carlo Method

• Main Author: 簡仁建
• Other Authors: 張璞曾
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/72516082109056083395

碩士 === 國立臺灣大學 === 電機工程學研究所 === 89 === The most desired aim of clinical detection is to minimize the dimension of detection instruments but still maintain high resolution and high precision. One of the most important mechanisms for maintaining the life of human beings is the human circulatory system. This researches focus on a non-invasive technique of photon measuring. From the measured results we can obtain important biomedical parameters useful for pathological diagnosis. This project is to implement a non-invasive optical flow velocimetry for detecting the human circulatory system under the skin surface. Monte Carlo Method is used to simulate and model the transmission of photon on the skin surface. The incident light source used was the He-Ne laser. The signal was transmitted and detected via Y-type optical fiber. Optical heterodyning is used to measure the frequency difference between the reflection wave and the original incidence laser wave. This is a real-time and continuous blood flow velocimetry. We find that the proposed method is feasible for doctors when doing clinical diagnosis. The results of simulation using Monte Carlo method and that of clinical experiment were identical. Therefore, in the future we can use Monte Carlo simulation to build the system without taking expriment.