文档介绍：An Approach to Detection of
Physiological Signals on Lumbar Vertebra
Based on Infrared Sequence Images
Bin Jing, Haiyun Li*
Dept. of Biomedical Engineering
Capital medical University
Beijing, P. R. China
jiingbin@, mu.
Abstract-In this paper, a method is developed to detect the II. METHOD
physiological signals on lumbar vertebra based on infrared We first construct an infrared dynamic image acquisition
sequence images. Firstly, an infrared dynamic image acquisition system. It contains a sensor system, a digital analog converter
system is constructed, and then infrared sequence images on the system and an analysis system. The experiment is performed
lumbar vertebra are acquired for 30s. Then, the time-lapse with this system.
signal of mean gray value of region of interest (ROI) is obtained. First, we locate the lumbar L1 and start to get the
Then, the power spectral density (PSD) is calculated by three sequence images, and the video format is PAL with a speed of
methods: periodogram, Welch and AR model. From the 25 frame/s. 750 images are acquired in all. Fig 1 is the first
spectrum graph, we can get some meaningful signals including image of the sequence. The rectangle in the image is ROI with
heart rate, respiration rate and so on. It will be very useful for 10*10 pixels.
the clinical diagnoses and treatment of lumbar disc herniati