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Imaging of the optical properties of turbid media with integrated detection based on the Kubelka-Munk model

JUN
24
2019
24. JUN 2019

Poster Hall B0 European Conferences on Biomedical Optics (ECBO) > Diffuse Optical Spectroscopy and Imaging > Lunch Break and Poster Session - Monday

12:45-14:15 h | Hall B0 Hall B0, ICM

Subjects: Biophotonics and Medical Engineering

Type: Poster

Speech: English

We describe a diffuse optical imaging (DOI) system with structured illumination and integrated detection based on the Kubelka-Munk (KM) light propagation model for the spatial characterization of the absorption and scattering properties of turbid media. Although light propagation in turbid media may be modeled by Monte Carlo techniques or based on the radiative transfer equation (RTE), the KM model is still widely used because of its relative simplicity, as it allows to express the scattering and absorption coefficients directly in terms of the measured reflection and transmission. However, in the conventional KM method, measurements are usually performed with integrating spheres, and it is not possible to resolve the spatial characteristics of the optical properties. The proposed system is based on the concept of a single-pixel camera. Our strategy allows to retrieve images of the absorption and scattering properties of turbid media by using bucket detectors such as integrating spheres with photodiodes. The spatial resolution is achieved by projecting a set of microstructured light pattern onto the sample. Those patterns are codified by a digital micromirror device (DMD). Maps of total reflectance and transmittance, to apply the KM method, are generated from the photodiode signals by using single-pixel imaging algorithms. Our experimental results confirm the validity of the idea. The data acquisition process can be speed up by the application of compressive sensing. In addition, the simplicity of the detection system makes possible to choose more complex sensors attached to the integrating spheres, such as fiber spectrometers for performing hyperspectral imaging.

Informations

Author,
Univ. Jaume I

Armin J. M. Lenz
Armin J. M. Lenz

Location

Eingang
Nord-West
ICM
Eingang
Nord
Eingang
West
Atrium
Eingang
Nord-Ost
Eingang
Ost
Conference
Center Nord
Freigelände
C1
C2
C3
C4
C5
C6
B0
B1
B2
B3
B4
B5
B6
A1
A2
A3
A4
A5
A6

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