Near-Infrared Imaging Approach for in vivo Detecting the Distribution of Human Blood Vessels

The near-infrared diffuse reflectance imaging method is presented to detect the distribution of blood vessels at body surfaces in the paper. In the experimental system, the near-infrared LED was used as the light source, the low-noise CMOS camera sensor combining with a filter was used as the detector, the computer was used as the data-processing terminal. After the system had been set up, two groups of photos for the hand and the arm were taken respectively. One group was taken under the nature light, the other group was taken under the near-infrared LEDs. The distribution of the blood vessels cannot be got in the first group of photos, while they can be got in the second group of photos. The results show that the near-infrared imaging method could be used to detect blood vessels noninvasively and conveniently.