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Proceedings Paper

Implementation of uniform and simultaneous ART for 3D volume reconstruction in x-ray imaging system
Author(s): Young Jun Roh; Won Shik Park; Hyung Suck Cho; Hyoung Jo Jeon
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Paper Abstract

In this research, we propose a 3D volume reconstruction method using x-ray images and present a series of calibration methods to implement it in an x-ray imaging system. In our previous work, we have proposed an advanced 3D reconstruction algorithm based on algebraic reconstruction technique(ART), called a uniform and simultaneous ART(USART). In practice, however, there are two main issues to implement it in a realized x-ray imaging system. The first one is huge computation time and memory required in achieving 3D volume, which is a common limitation in ART methods. The second issue is the problem on system calibration for determining the geometry of the x-ray imaging conditions which are necessary information in ART method. This work addresses solving out these problems : We propose a fast computing model of USART, where spherical voxel elements are employed in computation to reduce computation time and memory. And a calibration method is proposed here to identify the x-ray imaging geometry based on a cone beam projection model. For this purpose, a reference grid pattern is locally displaced to predetermined positions, and then their relative coordinates are determined by analyzing the image variations according to the displacements of the grid pattern. The validity of the proposed 3D reconstruction method is investigated from a series of experiments.

Paper Details

Date Published: 18 October 2002
PDF: 12 pages
Proc. SPIE 4902, Optomechatronic Systems III, (18 October 2002); doi: 10.1117/12.467338
Show Author Affiliations
Young Jun Roh, Korea Advanced Institute of Science and Technology (South Korea)
Won Shik Park, Korea Advanced Institute of Science and Technology (South Korea)
Hyung Suck Cho, Korea Advanced Institute of Science and Technology (South Korea)
Hyoung Jo Jeon, Samsung Electronics Co., Ltd. (South Korea)

Published in SPIE Proceedings Vol. 4902:
Optomechatronic Systems III
Toru Yoshizawa, Editor(s)

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