Ms. Camille Vazquez-Jaccaud Profile

Camille Vazquez-Jaccaud

Engineer at Centro de Investigaciones en Óptica AC

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Publications (7)

Proceedings Article | 3 November 2011 Paper

Cross-talk analysis in arterial hemoglobin oxygen saturation measurements

C. Vazquez-Jaccaud, G. Paez, M. Strojnik, G. Moreno-Gonzalez-Teran

Proceedings Volume 8011, 801196 (2011) https://doi.org/10.1117/12.903390

KEYWORDS: Oxygen, Oximetry, Light emitting diodes, Absorption, Near infrared, Tissue optics, Absorbance, Oximeters, Blood, Sensors

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Proceedings Article | 28 August 2010 Paper

Oxygen saturation with simulated breathing

Camille Vazquez-Jaccaud, Gonzalo Paez, Marija Strojnik

Proceedings Volume 7808, 78081J (2010) https://doi.org/10.1117/12.859760

KEYWORDS: Oxygen, Absorption, Oximetry, Transmittance, Signal to noise ratio, Heart, Near infrared spectroscopy, Near infrared, Tissues, Signal attenuation

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Proceedings Article | 2 September 2009 Paper

Transillumination waveform simulator for pulse oximetry

Camille Vazquez-Jaccaud, Gonzalo Paez, Marija Strojnik

Proceedings Volume 7453, 74530V (2009) https://doi.org/10.1117/12.824897

KEYWORDS: Oximetry, Signal attenuation, Absorption, Oxygen, Tissues, Signal processing, Blood, Tissue optics, Signal to noise ratio, Fourier transforms

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Pulse oximetry technique is a non invasive method useful to monitor the quantity of oxygen in hemoglobin, used in medical diagnosis and clinical decision-making. It is based on the ratio between the red and infrared light absorbance corresponding to the oxygenated (HbO₂) and non-oxygenated (Hb) state of the hemoglobin. We develop the mathematical model to obtain the oxygen saturation value observing that it depends on four known parameters: two transillumination values assessed at the common pulse oximetry wavelengths (λ₁ = 660 nm y λ₂ = 940 nm), and the extinction coefficients for the oxy- and deoxy-hemoglobin at these given wavelengths. Analyzing the extinction curves for oxy- and deoxy-hemoglobin we note that at λ equal to 660 nm the HbO₂ component almost does not contribute to the attenuation of incidance when we transilluminate tissue (7.479x10^-5 cm^-1M^-1). In this case is the Hb component that gives the significant attenuation value (7.863x10^-4 cm^-1M^-1). In 940 nm the extinction coefficient of the Hb is 2.589x10^-5 cm^-1M^-1 and we can ignore it when we count attenuation. At this λ we assume that the pulsate component is only affected by the HbO₂ (2.099x10^-4 cm^-1M^-1). This analysis of hemoglobin extinction coefficients in the absorption curves highlights the signal to noise ratio between these two oxygen dependent elements. We are interested in accentuate the better contrast interval (λ pair), where this signal-to-noise ratio is higher, looking for more transillumination information and more precise SO₂ value. We propose to use a transillumination waveform simulator to study the different effects (respiration, artifact body movement, absorption, low perfusion, etc) presented in complex physiological signals and to know the optical path-integrated behavior when we transilluminate tissue. This is practical for acquisition and processing transillumination signals. The present work is the first part of a λ selection method to guaratee the optimum S/N for measurements in blood using pulse oximetry and spectroscopic techniques at near infrared.

Proceedings Article | 20 February 2009 Paper

Ballistic photons in tissue characterization study

Camille Vazquez-Jaccaud, Gonzalo Paez, Marija Strojnik, Michelle Scholl

Proceedings Volume 7186, 71860P (2009) https://doi.org/10.1117/12.809777

KEYWORDS: Photons, Scattering, Tissue optics, Laser scattering, Interferometry, Absorption, Tissues, Refraction, Laser tissue interaction, Diagnostics

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Proceedings Article | 3 September 2008 Paper

Evaluation of oxygen saturation using a heart simulator

Camille Vazquez-Jaccaud, Gonzalo Paez, Marija Strojnik

Proceedings Volume 7082, 70820O (2008) https://doi.org/10.1117/12.806206

KEYWORDS: Oxygen, Absorption, Oximetry, Heart, Near infrared, Near infrared spectroscopy, Spectroscopy, Tissues, Signal attenuation, Signal to noise ratio

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Proceedings Article | 3 September 2008 Paper

Flame evolution during first second after ignition in a gas stove

Marija Strojnik, Gonzalo Paez, Camille Vazquez-Jaccaud, Eduardo Lopez

Proceedings Volume 7082, 70820N (2008) https://doi.org/10.1117/12.797452

KEYWORDS: Image processing, Infrared cameras, Visualization, Combustion, Cameras, Infrared imaging, Optical inspection, Visible radiation, Video, Oxygen

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Proceedings Article | 7 September 2006 Paper

Development of noise-immune oximetry: theory and measurement

Gonzalo Paez, Camille Vazquez-Jaccaud, Marija Strojnik

Proceedings Volume 6307, 63070F (2006) https://doi.org/10.1117/12.674923

KEYWORDS: Signal processing, Oxygen, Signal attenuation, Mathematical modeling, Interference (communication), Tissues, Oximetry, Blood, Signal detection, Absorption

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Showing 5 of 7 publications

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