Tabatabai Habib, Oliver David E, Rohrbaugh John W, Papadopoulos Christopher
Department of Civil Engineering and Mechanics, University of Wisconsin-Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53211 USA.
Polytec, Inc., 25 South Street, Suite A, Hopkinton, MA 01748 USA.
Sens Imaging. 2013;14(1):13-28. doi: 10.1007/s11220-013-0077-1. Epub 2013 Aug 13.
Laser Doppler Vibrometry (LDV) has been widely used in engineering applications involving non-contact vibration and sound measurements. This technique has also been used in some biomedical applications including hearing research. The detectable frequencies are in the range of near-DC to 1 GHz or higher. This paper reviews applications of LDV in biomedical engineering and proposes new medical imaging applications based on measuring surface vibrations of tissues and organs. Tests were conducted on human skin using single point and scanning laser vibrometers. These tests suggest that skin vibrations due to the forcing excitation from the heart can be used in imaging of blood flow. The results of these tests illustrate the potential of such vibration measurements in a variety of diagnostic medical imaging applications including blood flow/restrictions, real-time monitoring of blood pressure variations, wound healing, muscle movements, etc. The fact that the measurements can be conducted remotely (non-contact) is an important benefit that adds to the promise of this approach.
激光多普勒测振技术（LDV）已广泛应用于涉及非接触式振动和声测量的工程应用中。该技术也已用于包括听力研究在内的一些生物医学应用中。可检测频率范围为近直流到1GHz或更高。本文综述了LDV在生物医学工程中的应用，并基于测量组织和器官的表面振动提出了新的医学成像应用。使用单点和扫描激光测振仪对人体皮肤进行了测试。这些测试表明，由心脏的强迫激励引起的皮肤振动可用于血流成像。这些测试结果说明了这种振动测量在各种诊断医学成像应用中的潜力，包括血流/血流限制、血压变化的实时监测、伤口愈合、肌肉运动等。测量可以远程（非接触）进行这一事实是该方法前景的一个重要优势。
