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Proceedings Paper

Investigation of megavoltage local tomography for detecting setup errors in radiation therapy
Author(s): Daxin Shi; Mark A. Anastasio; Xiaochuan Pan; Charles A. Pelizzari; Peter Munro
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Paper Abstract

We investigate the problem of reconstructing a 3D image of a tumor volume from a set of truncated MV cone-beam projections. Our proposed approach is distinct from previously investigated approaches in that it utilizes a local tomography reconstruction algorithm. Using simulated and experimental MV projection data, we demonstrate that a local cone-beam tomography algorithm can reconstruct accurate images that contain information regarding boundaries and edges inside a localized region of interest. We also demonstrate that the conventional Feldkamp-Davis-Kress cone-beam reconstruction algorithm is not well-suited for reconstructing images of low-contrast structures from truncated cone-beam projections.

Paper Details

Date Published: 30 May 2003
PDF: 7 pages
Proc. SPIE 5029, Medical Imaging 2003: Visualization, Image-Guided Procedures, and Display, (30 May 2003); doi: 10.1117/12.480348
Show Author Affiliations
Daxin Shi, Illinois Institute of Technology (United States)
Mark A. Anastasio, Illinois Institute of Technology (United States)
Xiaochuan Pan, Univ. of Chicago (United States)
Charles A. Pelizzari, Univ. of Chicago (United States)
Peter Munro, Varian Medical Systems (United States)


Published in SPIE Proceedings Vol. 5029:
Medical Imaging 2003: Visualization, Image-Guided Procedures, and Display
Robert L. Galloway, Editor(s)

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