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2024-03-28T11:49:49+01:00webmedcentral logo
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http://www.webmedcentral.com/images/Header_Logo.giftext/html2016-10-01T10:39:46+01:00http://www.webmedcentral.com/Dr. Robert A LodderToward Surreptitious Remote Sensing of Blood Alcohol Concentration: Results with Integrated Near-Infrared Spectral Imaging and Laser Speech Detection
http://www.webmedcentral.com/article_view/5185
Alcohol abuse is a major problem in the United States. The most common measurement tool used in law enforcement for the determination of alcohol concentration in subjects is the breath analyzer (BrAC), and subjects know when they are being measured. However, when surreptitious measurements of BrAC in freely moving humans are sought, then hyperspectral remote-sensing measurement techniques must be used. In this work, two remote sensing methods for the estimation of BrAC were studied. A clinical trial involving human subjects was performed to assess the supposition that molecular factor computing (MFC) near-infrared (NIR) hyperspectral imaging and speech analysis using laser interferometry could be used to noninvasively estimate BrAC in subjects at a distance. A conventional breath analyzer was used to provide reference measurements. MFC NIRS imaging measurements gave a standard error of prediction (SEP) for a global model (all subjects) for blood alcohol of 8.1 mg/dL (0.0081%) and r2 = 0.987. The laser interferometer measurements of speech gave an average SEP for individual subject results for blood alcohol of 9.0 mg/dL (0.0090%) and r2 = 0.975.