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Journal of Applied Research and Technology
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Photoacoustic Tomography System

Authors: J. D. Martínez-Ramírez; R. Quispe-Siccha; C. García-Segundo; F. J. González; R. Espinosa-Luna; G. Gutiérrez-Juárez;

Photoacoustic Tomography System

Abstract

Basados en el efecto fotoacústico pulsado, se desarrolló un dispositivo experimental para generar imágenesbidimensionales de muestras ópticamente opacas ocultas en un medio turbio. El medio turbio se hizo de agar ynanopartículas monodispersas, con estos materiales indujimos una absorción y esparcimiento óptico semejante al delos tejidos humanos. La señal PA se genera por la absorción óptica del la muestra; una vez producida viaja a travésdel medio esparsor. Las propiedades de ópticas de la muestra así como la forma de éste definen la amplitud y formade la señal PA. En el sistema fotoacústico se utilizaron pulsos láser de Nd: YAG de 10 ns, con frecuencia derepetición de 10Hz, y longitud de onda de 1064 nm. Las señales generadas fueron registradas por un transductorultrasónico con frecuencia de corte de 10 MHz. Tanto la muestra como el medio esparsor se rotaron para obtener 36proyecciones, las cuales fueron utilizadas para alimentar un algoritmo de reconstrucción de imágenes basado en latransformada de Radon. Como resultado se obtuvieron imágenes tomográficas 2D de tres muestras distintas.

Keywords

radon transform, Ingeniería, tomography, Photoacoustic imaging

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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gold