Exhaled air analysis using wideband wave number tuning range infrared laser photoacoustic spectroscopy

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Exhaled air analysis using wideband wave number tuning range infrared laser photoacoustic spectroscopy	666 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1117/1.JBO.22.1.017002

Title: Exhaled air analysis using wideband wave number tuning range infrared laser photoacoustic spectroscopy
Creator: Kistenev, Yury V.
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Kuzmin, Dmitry A.
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Penkova, Olga V.
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Kostyukova, Nadezhda Y.
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Karapuzikov, Alexey A.
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Borisov, Alexey V.
Date: 2017
DOI: 10.1117/1.JBO.22.1.017002
Description: The infrared laser photoacoustic spectroscopy (LPAS) and the pattern-recognition-based approach for noninvasive express diagnostics of pulmonary diseases on the basis of absorption spectra analysis of the patient’s exhaled air are presented. The study involved lung cancer patients ( N = 9 ), patients with chronic obstructive pulmonary disease ( N = 12 ), and a control group of healthy, nonsmoking volunteers ( N = 11 ). The analysis of the measured absorption spectra was based at first on reduction of the dimension of the feature space using principal component analysis; thereafter, the dichotomous classification was carried out using the support vector machine. The gas chromatography–mass spectrometry method (GC–MS) was used as the reference. The estimated mean value of the sensitivity of exhaled air sample analysis by the LPAS in dichotomous classification was not less than 90% and specificity was not less than 69%; the analogous results of analysis by GC–MS were 68% and 60%, respectively. Also, the approach to differential diagnostics based on the set of SVM classifiers usage is presented.