Volume 17, Issue 10 e202400151
RESEARCH ARTICLE

A hybrid learning approach to better classify exhaled breath's infrared spectra: A noninvasive optical diagnosis for socially significant diseases

Igor Semenovich Golyak

Corresponding Author

Igor Semenovich Golyak

Department of Physics, Bauman Moscow State Technical University, Moscow, Russia

Correspondence

Igor Semenovich Golyak, Department of Physics, Bauman Moscow State Technical University, 105005, Moscow, Russia.

Email: [email protected]

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Dmitriy Romanovich Anfimov

Dmitriy Romanovich Anfimov

Department of Physics, Bauman Moscow State Technical University, Moscow, Russia

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Pavel Pavlovich Demkin

Pavel Pavlovich Demkin

Department of Physics, Bauman Moscow State Technical University, Moscow, Russia

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Pavel Vyacheslavovich Berezhanskiy

Pavel Vyacheslavovich Berezhanskiy

Sechenov First Moscow State Medical University, Moscow, Russia

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Olga Aleksandrovna Nebritova

Olga Aleksandrovna Nebritova

Department of Physics, Bauman Moscow State Technical University, Moscow, Russia

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Andrey Nikolaevich Morozov

Andrey Nikolaevich Morozov

Department of Physics, Bauman Moscow State Technical University, Moscow, Russia

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Igor Leonidovich Fufurin

Igor Leonidovich Fufurin

Department of Physics, Bauman Moscow State Technical University, Moscow, Russia

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First published: 29 July 2024
Citations: 1

Abstract

Early diagnosis is crucial for effective treatment of socially significant diseases, such as type 1 diabetes mellitus (T1DM), pneumonia, and asthma. This study employs a diagnostic method based on infrared laser spectroscopy of human exhaled breath. The experimental setup comprises a quantum cascade laser, which emits in a pulsed mode with a peak power of up to 150 mW in the spectral range of 5.3–12.8 μm (780–1890 cm−1), and a Herriott multipass gas cell with a specific optical path length of 76 m. Using this setup, spectra of exhaled breath in the mid-infrared range were obtained from 165 volunteers, including healthy individuals, patients with T1DM, asthma, and pneumonia. The study proposes a hybrid approach for classifying these spectra, utilizing a variational autoencoder for dimensionality reduction and a support vector machine method for classification. The results demonstrate that the proposed hybrid approach outperforms other machine learning method combinations.image

CONFLICT OF INTEREST STATEMENT

The authors declare no financial or commercial conflicts of interest exist.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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