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Wavelength selection method with standard deviation: application to pulse oximetry.
Vazquez-Jaccaud, Camille; Paez, Gonzalo; Strojnik, Marija.
Afiliação
  • Vazquez-Jaccaud C; Infrared Physics Group, Centro de Investigaciones en Optica, Apartado Postal 1-948, 37150 Leon, Gto., Mexico.
Ann Biomed Eng ; 39(7): 1994-2009, 2011 Jul.
Article em En | MEDLINE | ID: mdl-21461782
Near-infrared spectroscopy provides useful biological information after the radiation has penetrated through the tissue, within the therapeutic window. One of the significant shortcomings of the current applications of spectroscopic techniques to a live subject is that the subject may be uncooperative and the sample undergoes significant temporal variations, due to his health status that, from radiometric point of view, introduce measurement noise. We describe a novel wavelength selection method for monitoring, based on a standard deviation map, that allows low-noise sensitivity. It may be used with spectral transillumination, transmission, or reflection signals, including those corrupted by noise and unavoidable temporal effects. We apply it to the selection of two wavelengths for the case of pulse oximetry. Using spectroscopic data, we generate a map of standard deviation that we propose as a figure-of-merit in the presence of the noise introduced by the living subject. Even in the presence of diverse sources of noise, we identify four wavelength domains with standard deviation, minimally sensitive to temporal noise, and two wavelengths domains with low sensitivity to temporal noise.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxigênio / Algoritmos / Oximetria / Interpretação Estatística de Dados / Diagnóstico por Computador / Artefatos Tipo de estudo: Diagnostic_studies / Prognostic_studies Aspecto: Patient_preference Limite: Humans Idioma: En Revista: Ann Biomed Eng Ano de publicação: 2011 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxigênio / Algoritmos / Oximetria / Interpretação Estatística de Dados / Diagnóstico por Computador / Artefatos Tipo de estudo: Diagnostic_studies / Prognostic_studies Aspecto: Patient_preference Limite: Humans Idioma: En Revista: Ann Biomed Eng Ano de publicação: 2011 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos