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- W2016417622 abstract "The chest-wall underneath the breast tissue distorts the diffused near infra-red light measured at distant source-detectorpairs. Common image reconstruction method consider the media as homogeneous and applying the semi-infinite model.In this paper, we have compared the performance of our two-layer model with semi-infinite model by simulation and aclinical case. The results show that when the chest wall has significant effect on the measurement data, a benign lesionwith low absorption can be misled as a malignant case with high absorption by using semi-infinite model.We have also shown the influence of mismatch geometry of breast tissue and chest-wall at lesion and reference sides onthe reconstructed image and a correction method has been introduced to reduce these effects. With the assistance of twoorthogonal co-registered ultrasounds, the geometry of the breast tissue and chest wall interface can be determined andmodeled as a two-layer medium with 3D finite element mesh. Since numerical algorithms based on finite elementmethods (FEM) are suitable for complex geometry and boundary conditions, this method is adapted to model the chestwall.Four parameters of bulk absorption and reduced scattering coefficients of the first and second layers are estimatedand used to characterize the optical properties of the medium. We used a finite element model based on modified bornapproximation for image reconstruction. A mismatch correction algorithm has been applied to compensate the mismatchgeometry of the breast tissue and chest-wall interface at the reference and the lesion side." @default.
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- W2016417622 date "2009-02-12" @default.
- W2016417622 modified "2023-09-25" @default.
- W2016417622 title "An optical tomography method that accounts for a titled chest-wall in breast imaging" @default.
- W2016417622 doi "https://doi.org/10.1117/12.812105" @default.
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