Abstract
This paper presents a novel, non-invasive, non-contact system to measure pulsewaveforms of artery via applying laser triangulation method to detect skin surfacevibration. The proposed arterial pulsation measurement (APM) system chiefly consists of alaser diode and a low cost complementary metal-oxide semiconductor (CMOS) imagesensor. Laser triangulation and centroid method are combined with the Fast FourierTransform (FFT) in this study. The shape and frequency of the arterial pulsation can bedetected rapidly by using our APM system. The relative variation of the pulse at differentmeasurement points near wrist joint is used as a prognostic guide in traditional Chinesemedicine (TCM). An extensive series of experiments was conducted to evaluate theperformance of the designed APM system. From experimental results, the pulse amplitudeand frequency at the Chun point (related to the small intestine) of left hand showed anobvious increase after having food. In these cases, the peak to peak amplitudes and thefrequencies of arterial pulsations range from 38 to 48 μm and from 1.27 to 1.35 Hz,respectively. The height of arterial pulsations on the area near wrist joint can be estimatedwith a resolution of better than 4 μm. This research demonstrates that applying a CMOSimage sensor in designing a non-contact, portable, easy-to-use, low cost pulse measurementsystem is feasible. Also, the designed APM system is well suited for evaluating and pre-diagnosing the health of a human being in TCM clinical practice.
Highlights
The waveform of arterial pulsation is considered a fundamental indicator for the diagnosis of cardiovascular disease, which can guide therapeutic decisions in complex clinical situations [1]
The proposed arterial pulsation measurement (APM) system consists of a laser diode and a low cost complementary metal-oxide semiconductor (CMOS) image sensor
Based on optical laser triangulation theory, a non-invasive and non-contact arterial pulsation measurement (APM) system to detect micro-vibration on skin surface is developed in this work
Summary
The waveform of arterial pulsation is considered a fundamental indicator for the diagnosis of cardiovascular disease, which can guide therapeutic decisions in complex clinical situations [1]. The CMOS image sensors possess several programmable features including electronic exposure (ET) control, continuous or single frame capture, and progressive or interlaced scanning modes The first of these features is very important to our experiments, especially for reducing noise and locating measurement point of laser spot. In TCM clinical practice, an experienced TCM physician can do the pulse diagnosis by palpation treatment conducted on multiple measurement points (i.e., Chun, Guan, and Chy points) to determine the relationships between the organs health and the wave patterns of pulses. These facts have been demonstrated in many literatures [13,14]. The evaluation of pulse variation gives us some valuable information concerning about the tested subjects’ health
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
