Next generation CAT system
Author(s)
Kim, Jaewon, S.M. Massachusetts Institute of Technology
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Alternative title
Next generation Computerized Axial Tomography system
Other Contributors
Massachusetts Institute of Technology. Dept. of Architecture. Program in Media Arts and Sciences.
Advisor
Ramesh Raskar.
Terms of use
Metadata
Show full item recordAbstract
Two novel techniques for future CAT system are presented. Transmission descattering is a singleshot method to differentiate unscattered and scattered components of light transmission through a scattering material. Directly-transmitted components travel in a straight line from the light source, while scattered components originate from multiple scattering centers in the volume. Angularly varying scattered light is strategically captured via a lenslet array placed close to the image plane and the unscattered direct component is computed based on separable scattered components. The disadvantage is a reduction in spatial resolution. As an application, the enhanced tomographic reconstruction is demonstrated using estimated direct transmission images. The other technique is single-shot 3D reconstruction of a translucent object. Multiple light sources form images of a translucent object at different projection angles onto a screen. Those images are captured by a single-photo in a coded format via lenslet array. The projection image casted from each light source is separated from each other by a decoding process and in turn the images are combined to reconstruct 3D shape of the translucent object by ART method.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2010. Cataloged from PDF version of thesis. Includes bibliographical references (p. 45-48).
Date issued
2010Department
Program in Media Arts and Sciences (Massachusetts Institute of Technology)Publisher
Massachusetts Institute of Technology
Keywords
Architecture. Program in Media Arts and Sciences.