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6 October 2015 Nonlinear approach to difference imaging in diffuse optical tomography
Meghdoot Mozumder, Tanja Tarvainen, Aku Seppänen, Ilkka Nissilä, Simon R. Arridge, Ville Kolehmainen
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Journal of Biomedical Optics, Vol. 20, Issue 10, 105001 (October 2015). https://doi.org/10.1117/1.JBO.20.10.105001
Abstract
Difference imaging aims at recovery of the change in the optical properties of a body based on measurements before and after the change. Conventionally, the image reconstruction is based on using difference of the measurements and a linear approximation of the observation model. One of the main benefits of the linearized difference reconstruction is that the approach has a good tolerance to modeling errors, which cancel out partially in the subtraction of the measurements. However, a drawback of the approach is that the difference images are usually only qualitative in nature and their spatial resolution can be weak because they rely on the global linearization of the nonlinear observation model. To overcome the limitations of the linear approach, we investigate a nonlinear approach for difference imaging where the images of the optical parameters before and after the change are reconstructed simultaneously based on the two datasets. We tested the feasibility of the method with simulations and experimental data from a phantom and studied how the approach tolerates modeling errors like domain truncation, optode coupling errors, and domain shape errors.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE) 1083-3668/2015/$25.00 © 2015 SPIE
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Meghdoot Mozumder, Tanja Tarvainen, Aku Seppänen, Ilkka Nissilä, Simon R. Arridge, and Ville Kolehmainen "Nonlinear approach to difference imaging in diffuse optical tomography," Journal of Biomedical Optics 20(10), 105001 (6 October 2015). https://doi.org/10.1117/1.JBO.20.10.105001
Published: 6 October 2015
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Cited by 10 scholarly publications.
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KEYWORDS
Nonlinear optics
Data modeling
Error analysis
Diffuse optical imaging
Diffuse optical tomography
Sensors
Optical imaging
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