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We present an algorithm which allows us to investigate what is feasible when reconstructing a Region-Of-Interest (ROI) from transaxial truncated cone-beam projections obtained on a circular orbit in combination with information obtained at a different magnification level. We use the well-known fact that a rough estimate of the global properties of the Radon… (More)
We present an algorithm which allows us to reconstruct a Region-Of-Interest (ROI) from transaxial truncated cone-beam projections. While sometimes it is possible to reconstruct good approximations from projections passing only through a specific localized region, in other cases the reconstruction of the original density function shows severe artifacts,… (More)
Acknowledgments I would like to thanks all those people for continuing support and help in making this thesis possible.
be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, broadcasting or by any other information storage and retrieval system without written permission from the copyright owner. I don't give a shit for fame. I don't give a shit for society. I don't care about making friends with important people.… (More)
In this paper we develop a new algorithm that enables the reconstruction of a region of interest (ROI) in X-ray Computed Tomography (CT), when only a local region of the object is to be imaged. The method uses a Gaussian window function in order to reduce the X-ray attenuation from the region outside the ROI. The method uses almost completely local data and… (More)