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- W2019415426 abstract "We propose the use of a time-of-flight (TOF) camera to obtain the patient's body contour in 3D guided imagingreconstruction scheme in CT and C-arm imaging systems with truncated projection. In addition to pixel intensity, a TOFcamera provides the 3D coordinates of each point in the captured scene with respect to the camera coordinates.Information from the TOF camera was used to obtain a digitized surface of the patient's body. The digitization points aretransformed to X-Ray detector coordinates by registering the two coordinate systems. A set of points corresponding tothe slice of interest are segmented to form a 2D contour of the body surface. Radon transform is applied to the contour togenerate the 'trust region' for the projection data. The generated 'trust region' is integrated as an input to augment theprojection data. It is used to estimate the truncated, unmeasured projections using linear interpolation. Finally the imageis reconstructed using the combination of the estimated and the measured projection data. The proposed method isevaluated using a physical phantom. Projection data for the phantom were obtained using a C-arm system. Significantimprovement in the reconstructed image quality near the truncation edges was observed using the proposed method ascompared to that without truncation correction. This work shows that the proposed 3D guided CT image reconstructionusing a TOF camera represents a feasible solution to the projection data truncation problem." @default.
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- W2019415426 date "2011-03-03" @default.
- W2019415426 modified "2023-09-26" @default.
- W2019415426 title "3D-guided CT reconstruction using time-of-flight camera" @default.
- W2019415426 doi "https://doi.org/10.1117/12.878881" @default.
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