Title

An Inverse-Geometry Volumetric CT System With a Large-Area Scanned Source: A Feasibility Study

Document Type

Article

Language

eng

Format of Original

5 p.

Publication Date

9-2004

Publisher

American Association of Physicists in Medicine

Source Publication

Medical Physics

Source ISSN

0094-2405

Original Item ID

doi: 10.1118/1.1786171

Abstract

We propose an inverse-geometry volumetric CT system for acquiring a 15-cm volume in one rotation with negligible cone-beam artifacts. The system uses a large-area scanned source and a smaller detector array. This note describes two feasibility investigations. The first examines data sufficiency in the transverse planes. The second predicts the signal-to-noise ratio(SNR) compared to a conventional scanner. Results showed sufficient sampling of the full volume in less than 0.5 s and, when compared to a conventional scanner operating at 24 kW with a 0.5-s voxel illumination time (e.g., 0.5-s gantry rotation and pitch of one), predicted a relative SNR of 76%.

Comments

Medical Physics, Vol. 31, No. 9 (September 2004): 2623-2627. DOI.