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Conference papers
Direct backprojection-filtration formula for region-of-interest imaging with few additional projections
Abstract : This paper provides a backprojection-filtration
method for image reconstruction in divergent circular fan-beam
and cone-beam geometries with flat detectors. It is based on a
splitting of the acquisition angular range into angular sectors
admitting filtering orientations in the image space where a
simple, mono-directional Fourier-based filtering is possible. The
new workflow is used for region-of-interest (ROI) reconstruction
from dual-rotation acquisitions, consisting of a truncated, densely
sampled acquisition and of a few additional non-truncated views.
Results show that the reconstructed images using our new
approach are similar to what FBP would achieve in the non-
truncated case, and demonstrate the feasibility of an accurate
direct reconstruction method for dual-rotation ROI imaging with
very few non-truncated views.
https://hal.telecom-paris.fr/hal-02288517
Contributor : Telecomparis Hal Connect in order to contact the contributor
Submitted on : Saturday, September 14, 2019 - 6:54:34 PM
Last modification on : Tuesday, October 19, 2021 - 11:15:16 AM
Contributor : Telecomparis Hal Connect in order to contact the contributor
Submitted on : Saturday, September 14, 2019 - 6:54:34 PM
Last modification on : Tuesday, October 19, 2021 - 11:15:16 AM