Wavelength selection method with standard deviation: application to pulse oximetry.
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.
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