Influence of photo-detector's dead-time on the speckle contrast for blood flow measurement



Título del documento: Influence of photo-detector's dead-time on the speckle contrast for blood flow measurement
Revista: Journal of applied research and technology
Base de datos: PERIÓDICA
Número de sistema: 000395698
ISSN: 1665-6423
Autores: 1
1
1
1
Instituciones: 1Instituto Nacional de Astrofísica, Optica y Electrónica, Departamento de Optica, Tonantzintla, Puebla. México
Año:
Periodo: Dic
Volumen: 13
Número: 6
Paginación: 551-554
País: México
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Aplicado, descriptivo
Resumen en inglés The statistics of temporal integration of dynamically scattered light is commonly employed to calculate the correlation time of the light and related physical properties of the object that produce it, i.e. scatterer's speed. Recently, studying the statistics of time-averaged fluorescence intensity, it was reported that a small dead-time (1% of the exposure time) of the photo-detector increases the correlation time by one order of magnitude compared with an ideal photo-detector. Applying the same theory to the speckle contrast calculation for blood flow measurement, we found that the effect of dead-time is negligible compared to an ideal photo-detector for contrast calculation
Disciplinas: Ingeniería,
Medicina,
Física y astronomía
Palabras clave: Sistema cardiovascular,
Optica,
Ingeniería biomédica,
Moteado laser,
Imagenología médica,
Flujo sanguíneo,
Fotodetectores
Keyword: Engineering,
Medicine,
Physics and astronomy,
Cardiovascular system,
Optics,
Biomedical engineering,
Laser speckle,
Medical imaging,
Blood flow,
Photodetectors
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