Investigating vascular activities via infrared imaging

The value of using microcirculation as a marker for cardiovascular health and as a means to assess the risk of cardiovascular events has been realized, which stimulates interest in developing instruments to detect and monitor basic vascular phenomena. It was confirmed that the low frequency oscillations derived from Laser Doppler Flowmetry (LDF) signals are related to certain vascular activities. In this work we used infrared imaging to visualize the vasculature network, and demonstrate its spatial, spectral, and temporal behaviors. Similar low frequency components were found, too. These features could be used for tissue classification. In addition, an image enhancement procedure was proposed for subjects with very weak vascular visibility. Other benefits from such enhancement will also be discussed.


Wei-Min Liu received PhD degree in Electrical Engineering from Univ. of Maryland, Baltimore County. Currently he is an assistant professor at Dept. of Computer Science and Information Engineering, National Chung Cheng University. He is also an affiliated scientist of National Institute of Biomedical Imaging and Bioengineering, USA. His research interests involve medical imaging, hyperspectral data exploitation, and biomedical signal processing