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Diffuse optical tomographic imager using a single light source
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10.1063/1.3040016
/content/aip/journal/jap/105/2/10.1063/1.3040016
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/2/10.1063/1.3040016
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

3D diffusion of photons through the phantom from a single source.

Image of FIG. 2.
FIG. 2.

Single source illumination of the tissue with a detector located on the opposite side of the object. is the source. are the detector positions.

Image of FIG. 3.
FIG. 3.

Experimental setup for a single probing light source with multiple detectors. The laser light source is modulated by 100 MHz sinusoidal signal.

Image of FIG. 4.
FIG. 4.

Phantom 1 used for experimental study of two inhomogeneities with sizes of 6 and 8 mm. The background absorption and scattering coefficients are and , respectively. We have used 6 and 8 mm separately and both together at a time in our experiment.

Image of FIG. 5.
FIG. 5.

Phantom 2 used for experimental study of 5 mm inhomogeneity. It has absorption and scattering coefficients of and , respectively.

Image of FIG. 6.
FIG. 6.

The flow chart for the linear MOBIIR algorithm which updates the reconstructed optical parameter.

Image of FIG. 7.
FIG. 7.

Simulated and experimental measurements for a homogeneous phantom 1 with absorption and scattering coefficients of and , respectively.

Image of FIG. 8.
FIG. 8.

Contour plot of experimentally reconstructed image shows its exact location as it is inside the phantom (arrow sign indicating the locations of inhomogeneity from the center), which we have used in our experiment. Background absorption and scattering coefficients are and , respectively.

Image of FIG. 9.
FIG. 9.

Contour plot of experimentally reconstructed image of 5 mm shows its exact location as it is in the high scattering phantom (arrow sign indicating the locations of inhomogeneity from the center of phantom), which we ahve used in our experiment. Background absorption and scattering coefficients are and , respectively.

Image of FIG. 10.
FIG. 10.

Jacobian which is the gradient of fluence with respect to optical parameter from source to detect. The absorption and scattering coefficients of background of the object are and , respectively.

Image of FIG. 11.
FIG. 11.

Simulated reconstructed image of a phantom with one 6 mm inhomogeneity of absorption coefficient of . The background absorption and scattering coefficients are , respectively.

Image of FIG. 12.
FIG. 12.

3D plot of the simulated reconstructed image of a phantom with 6 mm inhomogeneity of absorption coefficient absorption . The background absorption and scattering coefficients are and , respectively.

Image of FIG. 13.
FIG. 13.

Reconstructed image from experimentally procured data. The embedded inhomogeneity inside the phantom is 6 mm and absorption coefficient is .The absorption and scattering coefficients of background are and , respectively.

Image of FIG. 14.
FIG. 14.

Reconstructed image from experimentally procured data. The embedded inhomogeneity size is 5 mm and absorption coefficient is .The absorption and scattering coefficients of background of are and , respectively.

Image of FIG. 15.
FIG. 15.

Reconstructed image of a phantom rotated by from experimental data. The embedded inhomogeneity size in phantom is 5 mm and absorption coefficient is . The absorption and scattering coefficients of background are and , respectively.

Image of FIG. 16.
FIG. 16.

3D plot of reconstructed image from experimentally procure data. The embedded inhomogeneity is 6 mm and absorption coefficient is . The absorption and scattering coefficients of background of used phantom are and , respectively.

Image of FIG. 17.
FIG. 17.

3D plot of reconstructed image from experimentally procured data. The size of the embedded inhomogeneity is 5 mm and absorption coefficient is . The absorption and scattering coefficients of background of are and , respectively.

Image of FIG. 18.
FIG. 18.

3D plot of reconstructed image of a phantom rotated by from experimental data. The embedded inhomogeneity size in phantom is 5 mm and absorption coefficient is . The absorption and scattering coefficients of background of used phantom are and , respectively.

Image of FIG. 19.
FIG. 19.

Contour plot of normalized Hessian using the experimental data shows that the localization of the reconstructed inhomogeneity is perfect. The background absorption and scattering coefficients are and , respectively.

Image of FIG. 20.
FIG. 20.

Simulated reconstructed image of 6 and 8 mm inhomogeneities with absorption . The background absorption and scattering coefficients are and , respectively.

Image of FIG. 21.
FIG. 21.

3D plot of the simulated reconstructed image shows the exact positions of the inhomogeneities with . The background absorption coefficient is and scattering coefficient is .

Image of FIG. 22.
FIG. 22.

Reconstructed image. The object is a homogeneous circular disk with absorption coefficient of with two embedded inhomogeneities with sizes of 6 and 8 mm and of absorption coefficient of . Background absorption coefficient is and scattering coefficient is .

Image of FIG. 23.
FIG. 23.

3D plot of experimental result of 6 and 8 mm inhomogeneities with absorption coefficient of . The background absorption and scattering coefficients are and , respectively.

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/content/aip/journal/jap/105/2/10.1063/1.3040016
2009-01-30
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Diffuse optical tomographic imager using a single light source
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/2/10.1063/1.3040016
10.1063/1.3040016
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