Title

Image reconstruction for the circle-and-arc trajectory

Authors

Authors

A. Katsevich

Comments

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Abbreviated Journal Title

Phys. Med. Biol.

Keywords

CONE-BEAM CT; FILTERED BACKPROJECTION; INVERSION ALGORITHM; COMPUTED-TOMOGRAPHY; PI-LINES; ACQUISITION; GEOMETRY; Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging

Abstract

Proposed is an exact shift-invariant filtered backprojection algorithm for the circle-and-arc trajectory. The algorithm has several important features. First, it allows for the circle to be incomplete. Second, axial truncation of the cone beam data is allowed. Third, the length of the arc is determined only by the region of interest and is independent of the size of the entire object. The algorithm is quite flexible and can be used for even more general trajectories that consist of several circular segments and arcs. The algorithm applies also in the case when the circle (or, circles) is complete. A numerical experiment with the clock phantom demonstrated good image quality.

Journal Title

Physics in Medicine and Biology

Volume

50

Issue/Number

10

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

2249

Last Page

2265

WOS Identifier

WOS:000229866100005

ISSN

0031-9155

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